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SubjectRe: Linux 4.14.113
diff --git a/Makefile b/Makefile
index 94673d2a6a27..fcfef30ca9a6 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
VERSION = 4
PATCHLEVEL = 14
-SUBLEVEL = 112
+SUBLEVEL = 113
EXTRAVERSION =
NAME = Petit Gorille

diff --git a/arch/arc/configs/hsdk_defconfig b/arch/arc/configs/hsdk_defconfig
index 083560e9e571..4dac1169f528 100644
--- a/arch/arc/configs/hsdk_defconfig
+++ b/arch/arc/configs/hsdk_defconfig
@@ -9,6 +9,7 @@ CONFIG_NAMESPACES=y
# CONFIG_UTS_NS is not set
# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
+CONFIG_BLK_DEV_RAM=y
CONFIG_EMBEDDED=y
CONFIG_PERF_EVENTS=y
# CONFIG_VM_EVENT_COUNTERS is not set
diff --git a/arch/arc/kernel/head.S b/arch/arc/kernel/head.S
index 1f945d0f40da..208bf2c9e7b0 100644
--- a/arch/arc/kernel/head.S
+++ b/arch/arc/kernel/head.S
@@ -107,6 +107,7 @@ ENTRY(stext)
; r2 = pointer to uboot provided cmdline or external DTB in mem
; These are handled later in handle_uboot_args()
st r0, [@uboot_tag]
+ st r1, [@uboot_magic]
st r2, [@uboot_arg]
#endif

diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c
index 709649e5f9bc..6b8d106e0d53 100644
--- a/arch/arc/kernel/setup.c
+++ b/arch/arc/kernel/setup.c
@@ -35,6 +35,7 @@ unsigned int intr_to_DE_cnt;

/* Part of U-boot ABI: see head.S */
int __initdata uboot_tag;
+int __initdata uboot_magic;
char __initdata *uboot_arg;

const struct machine_desc *machine_desc;
@@ -433,6 +434,8 @@ static inline bool uboot_arg_invalid(unsigned long addr)
#define UBOOT_TAG_NONE 0
#define UBOOT_TAG_CMDLINE 1
#define UBOOT_TAG_DTB 2
+/* We always pass 0 as magic from U-boot */
+#define UBOOT_MAGIC_VALUE 0

void __init handle_uboot_args(void)
{
@@ -448,6 +451,11 @@ void __init handle_uboot_args(void)
goto ignore_uboot_args;
}

+ if (uboot_magic != UBOOT_MAGIC_VALUE) {
+ pr_warn(IGNORE_ARGS "non zero uboot magic\n");
+ goto ignore_uboot_args;
+ }
+
if (uboot_tag != UBOOT_TAG_NONE &&
uboot_arg_invalid((unsigned long)uboot_arg)) {
pr_warn(IGNORE_ARGS "invalid uboot arg: '%px'\n", uboot_arg);
diff --git a/arch/arm/crypto/sha256-armv4.pl b/arch/arm/crypto/sha256-armv4.pl
index fac0533ea633..f64e8413ab9a 100644
--- a/arch/arm/crypto/sha256-armv4.pl
+++ b/arch/arm/crypto/sha256-armv4.pl
@@ -205,10 +205,11 @@ K256:
.global sha256_block_data_order
.type sha256_block_data_order,%function
sha256_block_data_order:
+.Lsha256_block_data_order:
#if __ARM_ARCH__<7
sub r3,pc,#8 @ sha256_block_data_order
#else
- adr r3,sha256_block_data_order
+ adr r3,.Lsha256_block_data_order
#endif
#if __ARM_MAX_ARCH__>=7 && !defined(__KERNEL__)
ldr r12,.LOPENSSL_armcap
diff --git a/arch/arm/crypto/sha256-core.S_shipped b/arch/arm/crypto/sha256-core.S_shipped
index 555a1a8eec90..72c248081d27 100644
--- a/arch/arm/crypto/sha256-core.S_shipped
+++ b/arch/arm/crypto/sha256-core.S_shipped
@@ -86,10 +86,11 @@ K256:
.global sha256_block_data_order
.type sha256_block_data_order,%function
sha256_block_data_order:
+.Lsha256_block_data_order:
#if __ARM_ARCH__<7
sub r3,pc,#8 @ sha256_block_data_order
#else
- adr r3,sha256_block_data_order
+ adr r3,.Lsha256_block_data_order
#endif
#if __ARM_MAX_ARCH__>=7 && !defined(__KERNEL__)
ldr r12,.LOPENSSL_armcap
diff --git a/arch/arm/crypto/sha512-armv4.pl b/arch/arm/crypto/sha512-armv4.pl
index a2b11a844357..5fe336420bcf 100644
--- a/arch/arm/crypto/sha512-armv4.pl
+++ b/arch/arm/crypto/sha512-armv4.pl
@@ -267,10 +267,11 @@ WORD64(0x5fcb6fab,0x3ad6faec, 0x6c44198c,0x4a475817)
.global sha512_block_data_order
.type sha512_block_data_order,%function
sha512_block_data_order:
+.Lsha512_block_data_order:
#if __ARM_ARCH__<7
sub r3,pc,#8 @ sha512_block_data_order
#else
- adr r3,sha512_block_data_order
+ adr r3,.Lsha512_block_data_order
#endif
#if __ARM_MAX_ARCH__>=7 && !defined(__KERNEL__)
ldr r12,.LOPENSSL_armcap
diff --git a/arch/arm/crypto/sha512-core.S_shipped b/arch/arm/crypto/sha512-core.S_shipped
index 3694c4d4ca2b..de9bd7f55242 100644
--- a/arch/arm/crypto/sha512-core.S_shipped
+++ b/arch/arm/crypto/sha512-core.S_shipped
@@ -134,10 +134,11 @@ WORD64(0x5fcb6fab,0x3ad6faec, 0x6c44198c,0x4a475817)
.global sha512_block_data_order
.type sha512_block_data_order,%function
sha512_block_data_order:
+.Lsha512_block_data_order:
#if __ARM_ARCH__<7
sub r3,pc,#8 @ sha512_block_data_order
#else
- adr r3,sha512_block_data_order
+ adr r3,.Lsha512_block_data_order
#endif
#if __ARM_MAX_ARCH__>=7 && !defined(__KERNEL__)
ldr r12,.LOPENSSL_armcap
diff --git a/arch/arm/kernel/patch.c b/arch/arm/kernel/patch.c
index a50dc00d79a2..d0a05a3bdb96 100644
--- a/arch/arm/kernel/patch.c
+++ b/arch/arm/kernel/patch.c
@@ -16,7 +16,7 @@ struct patch {
unsigned int insn;
};

-static DEFINE_SPINLOCK(patch_lock);
+static DEFINE_RAW_SPINLOCK(patch_lock);

static void __kprobes *patch_map(void *addr, int fixmap, unsigned long *flags)
__acquires(&patch_lock)
@@ -33,7 +33,7 @@ static void __kprobes *patch_map(void *addr, int fixmap, unsigned long *flags)
return addr;

if (flags)
- spin_lock_irqsave(&patch_lock, *flags);
+ raw_spin_lock_irqsave(&patch_lock, *flags);
else
__acquire(&patch_lock);

@@ -48,7 +48,7 @@ static void __kprobes patch_unmap(int fixmap, unsigned long *flags)
clear_fixmap(fixmap);

if (flags)
- spin_unlock_irqrestore(&patch_lock, *flags);
+ raw_spin_unlock_irqrestore(&patch_lock, *flags);
else
__release(&patch_lock);
}
diff --git a/arch/arm/plat-samsung/Kconfig b/arch/arm/plat-samsung/Kconfig
index e8229b9fee4a..3265b8f86069 100644
--- a/arch/arm/plat-samsung/Kconfig
+++ b/arch/arm/plat-samsung/Kconfig
@@ -258,7 +258,7 @@ config S3C_PM_DEBUG_LED_SMDK

config SAMSUNG_PM_CHECK
bool "S3C2410 PM Suspend Memory CRC"
- depends on PM
+ depends on PM && (PLAT_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210)
select CRC32
help
Enable the PM code's memory area checksum over sleep. This option
diff --git a/arch/powerpc/kernel/rtasd.c b/arch/powerpc/kernel/rtasd.c
index 0f0b1b2f3b60..7caeae73348d 100644
--- a/arch/powerpc/kernel/rtasd.c
+++ b/arch/powerpc/kernel/rtasd.c
@@ -274,27 +274,16 @@ void pSeries_log_error(char *buf, unsigned int err_type, int fatal)
}

#ifdef CONFIG_PPC_PSERIES
-static s32 prrn_update_scope;
-
-static void prrn_work_fn(struct work_struct *work)
+static void handle_prrn_event(s32 scope)
{
/*
* For PRRN, we must pass the negative of the scope value in
* the RTAS event.
*/
- pseries_devicetree_update(-prrn_update_scope);
+ pseries_devicetree_update(-scope);
numa_update_cpu_topology(false);
}

-static DECLARE_WORK(prrn_work, prrn_work_fn);
-
-static void prrn_schedule_update(u32 scope)
-{
- flush_work(&prrn_work);
- prrn_update_scope = scope;
- schedule_work(&prrn_work);
-}
-
static void handle_rtas_event(const struct rtas_error_log *log)
{
if (rtas_error_type(log) != RTAS_TYPE_PRRN || !prrn_is_enabled())
@@ -303,7 +292,7 @@ static void handle_rtas_event(const struct rtas_error_log *log)
/* For PRRN Events the extended log length is used to denote
* the scope for calling rtas update-nodes.
*/
- prrn_schedule_update(rtas_error_extended_log_length(log));
+ handle_prrn_event(rtas_error_extended_log_length(log));
}

#else
diff --git a/arch/x86/kernel/cpu/cyrix.c b/arch/x86/kernel/cpu/cyrix.c
index 8949b7ae6d92..fa61c870ada9 100644
--- a/arch/x86/kernel/cpu/cyrix.c
+++ b/arch/x86/kernel/cpu/cyrix.c
@@ -124,7 +124,7 @@ static void set_cx86_reorder(void)
setCx86(CX86_CCR3, (ccr3 & 0x0f) | 0x10); /* enable MAPEN */

/* Load/Store Serialize to mem access disable (=reorder it) */
- setCx86_old(CX86_PCR0, getCx86_old(CX86_PCR0) & ~0x80);
+ setCx86(CX86_PCR0, getCx86(CX86_PCR0) & ~0x80);
/* set load/store serialize from 1GB to 4GB */
ccr3 |= 0xe0;
setCx86(CX86_CCR3, ccr3);
@@ -135,11 +135,11 @@ static void set_cx86_memwb(void)
pr_info("Enable Memory-Write-back mode on Cyrix/NSC processor.\n");

/* CCR2 bit 2: unlock NW bit */
- setCx86_old(CX86_CCR2, getCx86_old(CX86_CCR2) & ~0x04);
+ setCx86(CX86_CCR2, getCx86(CX86_CCR2) & ~0x04);
/* set 'Not Write-through' */
write_cr0(read_cr0() | X86_CR0_NW);
/* CCR2 bit 2: lock NW bit and set WT1 */
- setCx86_old(CX86_CCR2, getCx86_old(CX86_CCR2) | 0x14);
+ setCx86(CX86_CCR2, getCx86(CX86_CCR2) | 0x14);
}

/*
@@ -153,14 +153,14 @@ static void geode_configure(void)
local_irq_save(flags);

/* Suspend on halt power saving and enable #SUSP pin */
- setCx86_old(CX86_CCR2, getCx86_old(CX86_CCR2) | 0x88);
+ setCx86(CX86_CCR2, getCx86(CX86_CCR2) | 0x88);

ccr3 = getCx86(CX86_CCR3);
setCx86(CX86_CCR3, (ccr3 & 0x0f) | 0x10); /* enable MAPEN */


/* FPU fast, DTE cache, Mem bypass */
- setCx86_old(CX86_CCR4, getCx86_old(CX86_CCR4) | 0x38);
+ setCx86(CX86_CCR4, getCx86(CX86_CCR4) | 0x38);
setCx86(CX86_CCR3, ccr3); /* disable MAPEN */

set_cx86_memwb();
@@ -296,7 +296,7 @@ static void init_cyrix(struct cpuinfo_x86 *c)
/* GXm supports extended cpuid levels 'ala' AMD */
if (c->cpuid_level == 2) {
/* Enable cxMMX extensions (GX1 Datasheet 54) */
- setCx86_old(CX86_CCR7, getCx86_old(CX86_CCR7) | 1);
+ setCx86(CX86_CCR7, getCx86(CX86_CCR7) | 1);

/*
* GXm : 0x30 ... 0x5f GXm datasheet 51
@@ -319,7 +319,7 @@ static void init_cyrix(struct cpuinfo_x86 *c)
if (dir1 > 7) {
dir0_msn++; /* M II */
/* Enable MMX extensions (App note 108) */
- setCx86_old(CX86_CCR7, getCx86_old(CX86_CCR7)|1);
+ setCx86(CX86_CCR7, getCx86(CX86_CCR7)|1);
} else {
/* A 6x86MX - it has the bug. */
set_cpu_bug(c, X86_BUG_COMA);
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index afa1a204bc6d..df767e6de8dd 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -909,6 +909,8 @@ int __init hpet_enable(void)
return 0;

hpet_set_mapping();
+ if (!hpet_virt_address)
+ return 0;

/*
* Read the period and check for a sane value:
diff --git a/arch/x86/kernel/hw_breakpoint.c b/arch/x86/kernel/hw_breakpoint.c
index 8771766d46b6..9954a604a822 100644
--- a/arch/x86/kernel/hw_breakpoint.c
+++ b/arch/x86/kernel/hw_breakpoint.c
@@ -352,6 +352,7 @@ int arch_validate_hwbkpt_settings(struct perf_event *bp)
#endif
default:
WARN_ON_ONCE(1);
+ return -EINVAL;
}

/*
diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index bc6bc6689e68..1c52acaa5bec 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -596,8 +596,8 @@ static int __init smp_scan_config(unsigned long base, unsigned long length)
mpf_base = base;
mpf_found = true;

- pr_info("found SMP MP-table at [mem %#010lx-%#010lx] mapped at [%p]\n",
- base, base + sizeof(*mpf) - 1, mpf);
+ pr_info("found SMP MP-table at [mem %#010lx-%#010lx]\n",
+ base, base + sizeof(*mpf) - 1);

memblock_reserve(base, sizeof(*mpf));
if (mpf->physptr)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 4bd878c9f7d2..90b7eee6d0f9 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -11846,24 +11846,6 @@ static void prepare_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
kvm_clear_interrupt_queue(vcpu);
}

-static void load_vmcs12_mmu_host_state(struct kvm_vcpu *vcpu,
- struct vmcs12 *vmcs12)
-{
- u32 entry_failure_code;
-
- nested_ept_uninit_mmu_context(vcpu);
-
- /*
- * Only PDPTE load can fail as the value of cr3 was checked on entry and
- * couldn't have changed.
- */
- if (nested_vmx_load_cr3(vcpu, vmcs12->host_cr3, false, &entry_failure_code))
- nested_vmx_abort(vcpu, VMX_ABORT_LOAD_HOST_PDPTE_FAIL);
-
- if (!enable_ept)
- vcpu->arch.walk_mmu->inject_page_fault = kvm_inject_page_fault;
-}
-
/*
* A part of what we need to when the nested L2 guest exits and we want to
* run its L1 parent, is to reset L1's guest state to the host state specified
@@ -11877,6 +11859,7 @@ static void load_vmcs12_host_state(struct kvm_vcpu *vcpu,
struct vmcs12 *vmcs12)
{
struct kvm_segment seg;
+ u32 entry_failure_code;

if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_EFER)
vcpu->arch.efer = vmcs12->host_ia32_efer;
@@ -11903,7 +11886,17 @@ static void load_vmcs12_host_state(struct kvm_vcpu *vcpu,
vcpu->arch.cr4_guest_owned_bits = ~vmcs_readl(CR4_GUEST_HOST_MASK);
vmx_set_cr4(vcpu, vmcs12->host_cr4);

- load_vmcs12_mmu_host_state(vcpu, vmcs12);
+ nested_ept_uninit_mmu_context(vcpu);
+
+ /*
+ * Only PDPTE load can fail as the value of cr3 was checked on entry and
+ * couldn't have changed.
+ */
+ if (nested_vmx_load_cr3(vcpu, vmcs12->host_cr3, false, &entry_failure_code))
+ nested_vmx_abort(vcpu, VMX_ABORT_LOAD_HOST_PDPTE_FAIL);
+
+ if (!enable_ept)
+ vcpu->arch.walk_mmu->inject_page_fault = kvm_inject_page_fault;

if (enable_vpid) {
/*
@@ -11994,6 +11987,140 @@ static void load_vmcs12_host_state(struct kvm_vcpu *vcpu,
nested_vmx_abort(vcpu, VMX_ABORT_LOAD_HOST_MSR_FAIL);
}

+static inline u64 nested_vmx_get_vmcs01_guest_efer(struct vcpu_vmx *vmx)
+{
+ struct shared_msr_entry *efer_msr;
+ unsigned int i;
+
+ if (vm_entry_controls_get(vmx) & VM_ENTRY_LOAD_IA32_EFER)
+ return vmcs_read64(GUEST_IA32_EFER);
+
+ if (cpu_has_load_ia32_efer)
+ return host_efer;
+
+ for (i = 0; i < vmx->msr_autoload.guest.nr; ++i) {
+ if (vmx->msr_autoload.guest.val[i].index == MSR_EFER)
+ return vmx->msr_autoload.guest.val[i].value;
+ }
+
+ efer_msr = find_msr_entry(vmx, MSR_EFER);
+ if (efer_msr)
+ return efer_msr->data;
+
+ return host_efer;
+}
+
+static void nested_vmx_restore_host_state(struct kvm_vcpu *vcpu)
+{
+ struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
+ struct vcpu_vmx *vmx = to_vmx(vcpu);
+ struct vmx_msr_entry g, h;
+ struct msr_data msr;
+ gpa_t gpa;
+ u32 i, j;
+
+ vcpu->arch.pat = vmcs_read64(GUEST_IA32_PAT);
+
+ if (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS) {
+ /*
+ * L1's host DR7 is lost if KVM_GUESTDBG_USE_HW_BP is set
+ * as vmcs01.GUEST_DR7 contains a userspace defined value
+ * and vcpu->arch.dr7 is not squirreled away before the
+ * nested VMENTER (not worth adding a variable in nested_vmx).
+ */
+ if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
+ kvm_set_dr(vcpu, 7, DR7_FIXED_1);
+ else
+ WARN_ON(kvm_set_dr(vcpu, 7, vmcs_readl(GUEST_DR7)));
+ }
+
+ /*
+ * Note that calling vmx_set_{efer,cr0,cr4} is important as they
+ * handle a variety of side effects to KVM's software model.
+ */
+ vmx_set_efer(vcpu, nested_vmx_get_vmcs01_guest_efer(vmx));
+
+ vcpu->arch.cr0_guest_owned_bits = X86_CR0_TS;
+ vmx_set_cr0(vcpu, vmcs_readl(CR0_READ_SHADOW));
+
+ vcpu->arch.cr4_guest_owned_bits = ~vmcs_readl(CR4_GUEST_HOST_MASK);
+ vmx_set_cr4(vcpu, vmcs_readl(CR4_READ_SHADOW));
+
+ nested_ept_uninit_mmu_context(vcpu);
+ vcpu->arch.cr3 = vmcs_readl(GUEST_CR3);
+ __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail);
+
+ /*
+ * Use ept_save_pdptrs(vcpu) to load the MMU's cached PDPTRs
+ * from vmcs01 (if necessary). The PDPTRs are not loaded on
+ * VMFail, like everything else we just need to ensure our
+ * software model is up-to-date.
+ */
+ ept_save_pdptrs(vcpu);
+
+ kvm_mmu_reset_context(vcpu);
+
+ if (cpu_has_vmx_msr_bitmap())
+ vmx_update_msr_bitmap(vcpu);
+
+ /*
+ * This nasty bit of open coding is a compromise between blindly
+ * loading L1's MSRs using the exit load lists (incorrect emulation
+ * of VMFail), leaving the nested VM's MSRs in the software model
+ * (incorrect behavior) and snapshotting the modified MSRs (too
+ * expensive since the lists are unbound by hardware). For each
+ * MSR that was (prematurely) loaded from the nested VMEntry load
+ * list, reload it from the exit load list if it exists and differs
+ * from the guest value. The intent is to stuff host state as
+ * silently as possible, not to fully process the exit load list.
+ */
+ msr.host_initiated = false;
+ for (i = 0; i < vmcs12->vm_entry_msr_load_count; i++) {
+ gpa = vmcs12->vm_entry_msr_load_addr + (i * sizeof(g));
+ if (kvm_vcpu_read_guest(vcpu, gpa, &g, sizeof(g))) {
+ pr_debug_ratelimited(
+ "%s read MSR index failed (%u, 0x%08llx)\n",
+ __func__, i, gpa);
+ goto vmabort;
+ }
+
+ for (j = 0; j < vmcs12->vm_exit_msr_load_count; j++) {
+ gpa = vmcs12->vm_exit_msr_load_addr + (j * sizeof(h));
+ if (kvm_vcpu_read_guest(vcpu, gpa, &h, sizeof(h))) {
+ pr_debug_ratelimited(
+ "%s read MSR failed (%u, 0x%08llx)\n",
+ __func__, j, gpa);
+ goto vmabort;
+ }
+ if (h.index != g.index)
+ continue;
+ if (h.value == g.value)
+ break;
+
+ if (nested_vmx_load_msr_check(vcpu, &h)) {
+ pr_debug_ratelimited(
+ "%s check failed (%u, 0x%x, 0x%x)\n",
+ __func__, j, h.index, h.reserved);
+ goto vmabort;
+ }
+
+ msr.index = h.index;
+ msr.data = h.value;
+ if (kvm_set_msr(vcpu, &msr)) {
+ pr_debug_ratelimited(
+ "%s WRMSR failed (%u, 0x%x, 0x%llx)\n",
+ __func__, j, h.index, h.value);
+ goto vmabort;
+ }
+ }
+ }
+
+ return;
+
+vmabort:
+ nested_vmx_abort(vcpu, VMX_ABORT_LOAD_HOST_MSR_FAIL);
+}
+
/*
* Emulate an exit from nested guest (L2) to L1, i.e., prepare to run L1
* and modify vmcs12 to make it see what it would expect to see there if
@@ -12126,7 +12253,13 @@ static void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason,
*/
nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_CONTROL_FIELD);

- load_vmcs12_mmu_host_state(vcpu, vmcs12);
+ /*
+ * Restore L1's host state to KVM's software model. We're here
+ * because a consistency check was caught by hardware, which
+ * means some amount of guest state has been propagated to KVM's
+ * model and needs to be unwound to the host's state.
+ */
+ nested_vmx_restore_host_state(vcpu);

/*
* The emulated instruction was already skipped in
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 3d624c72c6c2..ebfc06f29f7b 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -194,6 +194,7 @@ static struct workqueue_struct *ec_query_wq;
static int EC_FLAGS_QUERY_HANDSHAKE; /* Needs QR_EC issued when SCI_EVT set */
static int EC_FLAGS_CORRECT_ECDT; /* Needs ECDT port address correction */
static int EC_FLAGS_IGNORE_DSDT_GPE; /* Needs ECDT GPE as correction setting */
+static int EC_FLAGS_CLEAR_ON_RESUME; /* Needs acpi_ec_clear() on boot/resume */

/* --------------------------------------------------------------------------
* Logging/Debugging
@@ -499,6 +500,26 @@ static inline void __acpi_ec_disable_event(struct acpi_ec *ec)
ec_log_drv("event blocked");
}

+/*
+ * Process _Q events that might have accumulated in the EC.
+ * Run with locked ec mutex.
+ */
+static void acpi_ec_clear(struct acpi_ec *ec)
+{
+ int i, status;
+ u8 value = 0;
+
+ for (i = 0; i < ACPI_EC_CLEAR_MAX; i++) {
+ status = acpi_ec_query(ec, &value);
+ if (status || !value)
+ break;
+ }
+ if (unlikely(i == ACPI_EC_CLEAR_MAX))
+ pr_warn("Warning: Maximum of %d stale EC events cleared\n", i);
+ else
+ pr_info("%d stale EC events cleared\n", i);
+}
+
static void acpi_ec_enable_event(struct acpi_ec *ec)
{
unsigned long flags;
@@ -507,6 +528,10 @@ static void acpi_ec_enable_event(struct acpi_ec *ec)
if (acpi_ec_started(ec))
__acpi_ec_enable_event(ec);
spin_unlock_irqrestore(&ec->lock, flags);
+
+ /* Drain additional events if hardware requires that */
+ if (EC_FLAGS_CLEAR_ON_RESUME)
+ acpi_ec_clear(ec);
}

#ifdef CONFIG_PM_SLEEP
@@ -1802,6 +1827,31 @@ static int ec_flag_query_handshake(const struct dmi_system_id *id)
}
#endif

+/*
+ * On some hardware it is necessary to clear events accumulated by the EC during
+ * sleep. These ECs stop reporting GPEs until they are manually polled, if too
+ * many events are accumulated. (e.g. Samsung Series 5/9 notebooks)
+ *
+ * https://bugzilla.kernel.org/show_bug.cgi?id=44161
+ *
+ * Ideally, the EC should also be instructed NOT to accumulate events during
+ * sleep (which Windows seems to do somehow), but the interface to control this
+ * behaviour is not known at this time.
+ *
+ * Models known to be affected are Samsung 530Uxx/535Uxx/540Uxx/550Pxx/900Xxx,
+ * however it is very likely that other Samsung models are affected.
+ *
+ * On systems which don't accumulate _Q events during sleep, this extra check
+ * should be harmless.
+ */
+static int ec_clear_on_resume(const struct dmi_system_id *id)
+{
+ pr_debug("Detected system needing EC poll on resume.\n");
+ EC_FLAGS_CLEAR_ON_RESUME = 1;
+ ec_event_clearing = ACPI_EC_EVT_TIMING_STATUS;
+ return 0;
+}
+
/*
* Some ECDTs contain wrong register addresses.
* MSI MS-171F
@@ -1851,6 +1901,9 @@ static const struct dmi_system_id ec_dmi_table[] __initconst = {
ec_honor_ecdt_gpe, "ASUS X580VD", {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "X580VD"),}, NULL},
+ {
+ ec_clear_on_resume, "Samsung hardware", {
+ DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD.")}, NULL},
{},
};

diff --git a/drivers/acpi/sbs.c b/drivers/acpi/sbs.c
index a2428e9462dd..3c092f07d7e3 100644
--- a/drivers/acpi/sbs.c
+++ b/drivers/acpi/sbs.c
@@ -441,9 +441,13 @@ static int acpi_ac_get_present(struct acpi_sbs *sbs)

/*
* The spec requires that bit 4 always be 1. If it's not set, assume
- * that the implementation doesn't support an SBS charger
+ * that the implementation doesn't support an SBS charger.
+ *
+ * And on some MacBooks a status of 0xffff is always returned, no
+ * matter whether the charger is plugged in or not, which is also
+ * wrong, so ignore the SBS charger for those too.
*/
- if (!((status >> 4) & 0x1))
+ if (!((status >> 4) & 0x1) || status == 0xffff)
return -ENODEV;

sbs->charger_present = (status >> 15) & 0x1;
diff --git a/drivers/auxdisplay/hd44780.c b/drivers/auxdisplay/hd44780.c
index 036eec404289..2d927feb3db4 100644
--- a/drivers/auxdisplay/hd44780.c
+++ b/drivers/auxdisplay/hd44780.c
@@ -302,6 +302,8 @@ static int hd44780_remove(struct platform_device *pdev)
struct charlcd *lcd = platform_get_drvdata(pdev);

charlcd_unregister(lcd);
+
+ kfree(lcd);
return 0;
}

diff --git a/drivers/base/node.c b/drivers/base/node.c
index ee090ab9171c..5c39f14d15a5 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -197,11 +197,16 @@ static ssize_t node_read_vmstat(struct device *dev,
sum_zone_numa_state(nid, i));
#endif

- for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++)
+ for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++) {
+ /* Skip hidden vmstat items. */
+ if (*vmstat_text[i + NR_VM_ZONE_STAT_ITEMS +
+ NR_VM_NUMA_STAT_ITEMS] == '\0')
+ continue;
n += sprintf(buf+n, "%s %lu\n",
vmstat_text[i + NR_VM_ZONE_STAT_ITEMS +
NR_VM_NUMA_STAT_ITEMS],
node_page_state(pgdat, i));
+ }

return n;
}
diff --git a/drivers/crypto/axis/artpec6_crypto.c b/drivers/crypto/axis/artpec6_crypto.c
index 6eb5cb92b986..9f82e14983f6 100644
--- a/drivers/crypto/axis/artpec6_crypto.c
+++ b/drivers/crypto/axis/artpec6_crypto.c
@@ -284,6 +284,7 @@ enum artpec6_crypto_hash_flags {

struct artpec6_crypto_req_common {
struct list_head list;
+ struct list_head complete_in_progress;
struct artpec6_crypto_dma_descriptors *dma;
struct crypto_async_request *req;
void (*complete)(struct crypto_async_request *req);
@@ -2046,7 +2047,8 @@ static int artpec6_crypto_prepare_aead(struct aead_request *areq)
return artpec6_crypto_dma_map_descs(common);
}

-static void artpec6_crypto_process_queue(struct artpec6_crypto *ac)
+static void artpec6_crypto_process_queue(struct artpec6_crypto *ac,
+ struct list_head *completions)
{
struct artpec6_crypto_req_common *req;

@@ -2057,7 +2059,7 @@ static void artpec6_crypto_process_queue(struct artpec6_crypto *ac)
list_move_tail(&req->list, &ac->pending);
artpec6_crypto_start_dma(req);

- req->req->complete(req->req, -EINPROGRESS);
+ list_add_tail(&req->complete_in_progress, completions);
}

/*
@@ -2087,6 +2089,11 @@ static void artpec6_crypto_task(unsigned long data)
struct artpec6_crypto *ac = (struct artpec6_crypto *)data;
struct artpec6_crypto_req_common *req;
struct artpec6_crypto_req_common *n;
+ struct list_head complete_done;
+ struct list_head complete_in_progress;
+
+ INIT_LIST_HEAD(&complete_done);
+ INIT_LIST_HEAD(&complete_in_progress);

if (list_empty(&ac->pending)) {
pr_debug("Spurious IRQ\n");
@@ -2120,19 +2127,30 @@ static void artpec6_crypto_task(unsigned long data)

pr_debug("Completing request %p\n", req);

- list_del(&req->list);
+ list_move_tail(&req->list, &complete_done);

artpec6_crypto_dma_unmap_all(req);
artpec6_crypto_copy_bounce_buffers(req);

ac->pending_count--;
artpec6_crypto_common_destroy(req);
- req->complete(req->req);
}

- artpec6_crypto_process_queue(ac);
+ artpec6_crypto_process_queue(ac, &complete_in_progress);

spin_unlock_bh(&ac->queue_lock);
+
+ /* Perform the completion callbacks without holding the queue lock
+ * to allow new request submissions from the callbacks.
+ */
+ list_for_each_entry_safe(req, n, &complete_done, list) {
+ req->complete(req->req);
+ }
+
+ list_for_each_entry_safe(req, n, &complete_in_progress,
+ complete_in_progress) {
+ req->req->complete(req->req, -EINPROGRESS);
+ }
}

static void artpec6_crypto_complete_crypto(struct crypto_async_request *req)
diff --git a/drivers/gpio/gpio-pxa.c b/drivers/gpio/gpio-pxa.c
index 2943dfc4c470..822ad220f0af 100644
--- a/drivers/gpio/gpio-pxa.c
+++ b/drivers/gpio/gpio-pxa.c
@@ -776,6 +776,9 @@ static int pxa_gpio_suspend(void)
struct pxa_gpio_bank *c;
int gpio;

+ if (!pchip)
+ return 0;
+
for_each_gpio_bank(gpio, c, pchip) {
c->saved_gplr = readl_relaxed(c->regbase + GPLR_OFFSET);
c->saved_gpdr = readl_relaxed(c->regbase + GPDR_OFFSET);
@@ -794,6 +797,9 @@ static void pxa_gpio_resume(void)
struct pxa_gpio_bank *c;
int gpio;

+ if (!pchip)
+ return;
+
for_each_gpio_bank(gpio, c, pchip) {
/* restore level with set/clear */
writel_relaxed(c->saved_gplr, c->regbase + GPSR_OFFSET);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c
index 164fa4b1f9a9..732b8fbbca68 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c
@@ -285,57 +285,7 @@ static int init_mqd_hiq(struct mqd_manager *mm, void **mqd,
struct kfd_mem_obj **mqd_mem_obj, uint64_t *gart_addr,
struct queue_properties *q)
{
- uint64_t addr;
- struct cik_mqd *m;
- int retval;
-
- retval = kfd_gtt_sa_allocate(mm->dev, sizeof(struct cik_mqd),
- mqd_mem_obj);
-
- if (retval != 0)
- return -ENOMEM;
-
- m = (struct cik_mqd *) (*mqd_mem_obj)->cpu_ptr;
- addr = (*mqd_mem_obj)->gpu_addr;
-
- memset(m, 0, ALIGN(sizeof(struct cik_mqd), 256));
-
- m->header = 0xC0310800;
- m->compute_pipelinestat_enable = 1;
- m->compute_static_thread_mgmt_se0 = 0xFFFFFFFF;
- m->compute_static_thread_mgmt_se1 = 0xFFFFFFFF;
- m->compute_static_thread_mgmt_se2 = 0xFFFFFFFF;
- m->compute_static_thread_mgmt_se3 = 0xFFFFFFFF;
-
- m->cp_hqd_persistent_state = DEFAULT_CP_HQD_PERSISTENT_STATE |
- PRELOAD_REQ;
- m->cp_hqd_quantum = QUANTUM_EN | QUANTUM_SCALE_1MS |
- QUANTUM_DURATION(10);
-
- m->cp_mqd_control = MQD_CONTROL_PRIV_STATE_EN;
- m->cp_mqd_base_addr_lo = lower_32_bits(addr);
- m->cp_mqd_base_addr_hi = upper_32_bits(addr);
-
- m->cp_hqd_ib_control = DEFAULT_MIN_IB_AVAIL_SIZE;
-
- /*
- * Pipe Priority
- * Identifies the pipe relative priority when this queue is connected
- * to the pipeline. The pipe priority is against the GFX pipe and HP3D.
- * In KFD we are using a fixed pipe priority set to CS_MEDIUM.
- * 0 = CS_LOW (typically below GFX)
- * 1 = CS_MEDIUM (typically between HP3D and GFX
- * 2 = CS_HIGH (typically above HP3D)
- */
- m->cp_hqd_pipe_priority = 1;
- m->cp_hqd_queue_priority = 15;
-
- *mqd = m;
- if (gart_addr)
- *gart_addr = addr;
- retval = mm->update_mqd(mm, m, q);
-
- return retval;
+ return init_mqd(mm, mqd, mqd_mem_obj, gart_addr, q);
}

static int update_mqd_hiq(struct mqd_manager *mm, void *mqd,
diff --git a/drivers/gpu/drm/nouveau/include/nvkm/subdev/volt.h b/drivers/gpu/drm/nouveau/include/nvkm/subdev/volt.h
index 8a0f85f5fc1a..6a765682fbfa 100644
--- a/drivers/gpu/drm/nouveau/include/nvkm/subdev/volt.h
+++ b/drivers/gpu/drm/nouveau/include/nvkm/subdev/volt.h
@@ -38,6 +38,7 @@ int nvkm_volt_set_id(struct nvkm_volt *, u8 id, u8 min_id, u8 temp,

int nv40_volt_new(struct nvkm_device *, int, struct nvkm_volt **);
int gf100_volt_new(struct nvkm_device *, int, struct nvkm_volt **);
+int gf117_volt_new(struct nvkm_device *, int, struct nvkm_volt **);
int gk104_volt_new(struct nvkm_device *, int, struct nvkm_volt **);
int gk20a_volt_new(struct nvkm_device *, int, struct nvkm_volt **);
int gm20b_volt_new(struct nvkm_device *, int, struct nvkm_volt **);
diff --git a/drivers/gpu/drm/nouveau/nouveau_debugfs.c b/drivers/gpu/drm/nouveau/nouveau_debugfs.c
index 9109b69cd052..9635704a1d86 100644
--- a/drivers/gpu/drm/nouveau/nouveau_debugfs.c
+++ b/drivers/gpu/drm/nouveau/nouveau_debugfs.c
@@ -161,7 +161,7 @@ nouveau_debugfs_pstate_set(struct file *file, const char __user *ubuf,
}

ret = pm_runtime_get_sync(drm->dev);
- if (IS_ERR_VALUE(ret) && ret != -EACCES)
+ if (ret < 0 && ret != -EACCES)
return ret;
ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_USER, &args, sizeof(args));
pm_runtime_put_autosuspend(drm->dev);
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
index e096a5d9c292..f8dd78e21456 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
@@ -1612,7 +1612,7 @@ nvd7_chipset = {
.pci = gf106_pci_new,
.therm = gf119_therm_new,
.timer = nv41_timer_new,
- .volt = gf100_volt_new,
+ .volt = gf117_volt_new,
.ce[0] = gf100_ce_new,
.disp = gf119_disp_new,
.dma = gf119_dma_new,
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/volt/Kbuild b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/Kbuild
index bcd179ba11d0..146adcdd316a 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/volt/Kbuild
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/Kbuild
@@ -2,6 +2,7 @@ nvkm-y += nvkm/subdev/volt/base.o
nvkm-y += nvkm/subdev/volt/gpio.o
nvkm-y += nvkm/subdev/volt/nv40.o
nvkm-y += nvkm/subdev/volt/gf100.o
+nvkm-y += nvkm/subdev/volt/gf117.o
nvkm-y += nvkm/subdev/volt/gk104.o
nvkm-y += nvkm/subdev/volt/gk20a.o
nvkm-y += nvkm/subdev/volt/gm20b.o
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/volt/gf117.c b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/gf117.c
new file mode 100644
index 000000000000..547a58f0aeac
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/gf117.c
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2019 Ilia Mirkin
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Ilia Mirkin
+ */
+#include "priv.h"
+
+#include <subdev/fuse.h>
+
+static int
+gf117_volt_speedo_read(struct nvkm_volt *volt)
+{
+ struct nvkm_device *device = volt->subdev.device;
+ struct nvkm_fuse *fuse = device->fuse;
+
+ if (!fuse)
+ return -EINVAL;
+
+ return nvkm_fuse_read(fuse, 0x3a8);
+}
+
+static const struct nvkm_volt_func
+gf117_volt = {
+ .oneinit = gf100_volt_oneinit,
+ .vid_get = nvkm_voltgpio_get,
+ .vid_set = nvkm_voltgpio_set,
+ .speedo_read = gf117_volt_speedo_read,
+};
+
+int
+gf117_volt_new(struct nvkm_device *device, int index, struct nvkm_volt **pvolt)
+{
+ struct nvkm_volt *volt;
+ int ret;
+
+ ret = nvkm_volt_new_(&gf117_volt, device, index, &volt);
+ *pvolt = volt;
+ if (ret)
+ return ret;
+
+ return nvkm_voltgpio_init(volt);
+}
diff --git a/drivers/gpu/drm/panel/panel-innolux-p079zca.c b/drivers/gpu/drm/panel/panel-innolux-p079zca.c
index 6ba93449fcfb..58b67e0cc385 100644
--- a/drivers/gpu/drm/panel/panel-innolux-p079zca.c
+++ b/drivers/gpu/drm/panel/panel-innolux-p079zca.c
@@ -40,7 +40,6 @@ static inline struct innolux_panel *to_innolux_panel(struct drm_panel *panel)
static int innolux_panel_disable(struct drm_panel *panel)
{
struct innolux_panel *innolux = to_innolux_panel(panel);
- int err;

if (!innolux->enabled)
return 0;
@@ -48,11 +47,6 @@ static int innolux_panel_disable(struct drm_panel *panel)
innolux->backlight->props.power = FB_BLANK_POWERDOWN;
backlight_update_status(innolux->backlight);

- err = mipi_dsi_dcs_set_display_off(innolux->link);
- if (err < 0)
- DRM_DEV_ERROR(panel->dev, "failed to set display off: %d\n",
- err);
-
innolux->enabled = false;

return 0;
@@ -66,6 +60,11 @@ static int innolux_panel_unprepare(struct drm_panel *panel)
if (!innolux->prepared)
return 0;

+ err = mipi_dsi_dcs_set_display_off(innolux->link);
+ if (err < 0)
+ DRM_DEV_ERROR(panel->dev, "failed to set display off: %d\n",
+ err);
+
err = mipi_dsi_dcs_enter_sleep_mode(innolux->link);
if (err < 0) {
DRM_DEV_ERROR(panel->dev, "failed to enter sleep mode: %d\n",
diff --git a/drivers/hid/i2c-hid/Makefile b/drivers/hid/i2c-hid/Makefile
index 832d8f9aaba2..099e1ce2f234 100644
--- a/drivers/hid/i2c-hid/Makefile
+++ b/drivers/hid/i2c-hid/Makefile
@@ -3,3 +3,6 @@
#

obj-$(CONFIG_I2C_HID) += i2c-hid.o
+
+i2c-hid-objs = i2c-hid-core.o
+i2c-hid-$(CONFIG_DMI) += i2c-hid-dmi-quirks.o
diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c
new file mode 100644
index 000000000000..7842d76aa813
--- /dev/null
+++ b/drivers/hid/i2c-hid/i2c-hid-core.c
@@ -0,0 +1,1299 @@
+/*
+ * HID over I2C protocol implementation
+ *
+ * Copyright (c) 2012 Benjamin Tissoires <benjamin.tissoires@gmail.com>
+ * Copyright (c) 2012 Ecole Nationale de l'Aviation Civile, France
+ * Copyright (c) 2012 Red Hat, Inc
+ *
+ * This code is partly based on "USB HID support for Linux":
+ *
+ * Copyright (c) 1999 Andreas Gal
+ * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
+ * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
+ * Copyright (c) 2007-2008 Oliver Neukum
+ * Copyright (c) 2006-2010 Jiri Kosina
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive for
+ * more details.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/irq.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/device.h>
+#include <linux/wait.h>
+#include <linux/err.h>
+#include <linux/string.h>
+#include <linux/list.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/hid.h>
+#include <linux/mutex.h>
+#include <linux/acpi.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+
+#include <linux/platform_data/i2c-hid.h>
+
+#include "../hid-ids.h"
+#include "i2c-hid.h"
+
+/* quirks to control the device */
+#define I2C_HID_QUIRK_SET_PWR_WAKEUP_DEV BIT(0)
+
+/* flags */
+#define I2C_HID_STARTED 0
+#define I2C_HID_RESET_PENDING 1
+#define I2C_HID_READ_PENDING 2
+
+#define I2C_HID_PWR_ON 0x00
+#define I2C_HID_PWR_SLEEP 0x01
+
+/* debug option */
+static bool debug;
+module_param(debug, bool, 0444);
+MODULE_PARM_DESC(debug, "print a lot of debug information");
+
+#define i2c_hid_dbg(ihid, fmt, arg...) \
+do { \
+ if (debug) \
+ dev_printk(KERN_DEBUG, &(ihid)->client->dev, fmt, ##arg); \
+} while (0)
+
+struct i2c_hid_desc {
+ __le16 wHIDDescLength;
+ __le16 bcdVersion;
+ __le16 wReportDescLength;
+ __le16 wReportDescRegister;
+ __le16 wInputRegister;
+ __le16 wMaxInputLength;
+ __le16 wOutputRegister;
+ __le16 wMaxOutputLength;
+ __le16 wCommandRegister;
+ __le16 wDataRegister;
+ __le16 wVendorID;
+ __le16 wProductID;
+ __le16 wVersionID;
+ __le32 reserved;
+} __packed;
+
+struct i2c_hid_cmd {
+ unsigned int registerIndex;
+ __u8 opcode;
+ unsigned int length;
+ bool wait;
+};
+
+union command {
+ u8 data[0];
+ struct cmd {
+ __le16 reg;
+ __u8 reportTypeID;
+ __u8 opcode;
+ } __packed c;
+};
+
+#define I2C_HID_CMD(opcode_) \
+ .opcode = opcode_, .length = 4, \
+ .registerIndex = offsetof(struct i2c_hid_desc, wCommandRegister)
+
+/* fetch HID descriptor */
+static const struct i2c_hid_cmd hid_descr_cmd = { .length = 2 };
+/* fetch report descriptors */
+static const struct i2c_hid_cmd hid_report_descr_cmd = {
+ .registerIndex = offsetof(struct i2c_hid_desc,
+ wReportDescRegister),
+ .opcode = 0x00,
+ .length = 2 };
+/* commands */
+static const struct i2c_hid_cmd hid_reset_cmd = { I2C_HID_CMD(0x01),
+ .wait = true };
+static const struct i2c_hid_cmd hid_get_report_cmd = { I2C_HID_CMD(0x02) };
+static const struct i2c_hid_cmd hid_set_report_cmd = { I2C_HID_CMD(0x03) };
+static const struct i2c_hid_cmd hid_set_power_cmd = { I2C_HID_CMD(0x08) };
+static const struct i2c_hid_cmd hid_no_cmd = { .length = 0 };
+
+/*
+ * These definitions are not used here, but are defined by the spec.
+ * Keeping them here for documentation purposes.
+ *
+ * static const struct i2c_hid_cmd hid_get_idle_cmd = { I2C_HID_CMD(0x04) };
+ * static const struct i2c_hid_cmd hid_set_idle_cmd = { I2C_HID_CMD(0x05) };
+ * static const struct i2c_hid_cmd hid_get_protocol_cmd = { I2C_HID_CMD(0x06) };
+ * static const struct i2c_hid_cmd hid_set_protocol_cmd = { I2C_HID_CMD(0x07) };
+ */
+
+static DEFINE_MUTEX(i2c_hid_open_mut);
+
+/* The main device structure */
+struct i2c_hid {
+ struct i2c_client *client; /* i2c client */
+ struct hid_device *hid; /* pointer to corresponding HID dev */
+ union {
+ __u8 hdesc_buffer[sizeof(struct i2c_hid_desc)];
+ struct i2c_hid_desc hdesc; /* the HID Descriptor */
+ };
+ __le16 wHIDDescRegister; /* location of the i2c
+ * register of the HID
+ * descriptor. */
+ unsigned int bufsize; /* i2c buffer size */
+ u8 *inbuf; /* Input buffer */
+ u8 *rawbuf; /* Raw Input buffer */
+ u8 *cmdbuf; /* Command buffer */
+ u8 *argsbuf; /* Command arguments buffer */
+
+ unsigned long flags; /* device flags */
+ unsigned long quirks; /* Various quirks */
+
+ wait_queue_head_t wait; /* For waiting the interrupt */
+
+ struct i2c_hid_platform_data pdata;
+
+ bool irq_wake_enabled;
+ struct mutex reset_lock;
+};
+
+static const struct i2c_hid_quirks {
+ __u16 idVendor;
+ __u16 idProduct;
+ __u32 quirks;
+} i2c_hid_quirks[] = {
+ { USB_VENDOR_ID_WEIDA, USB_DEVICE_ID_WEIDA_8752,
+ I2C_HID_QUIRK_SET_PWR_WAKEUP_DEV },
+ { USB_VENDOR_ID_WEIDA, USB_DEVICE_ID_WEIDA_8755,
+ I2C_HID_QUIRK_SET_PWR_WAKEUP_DEV },
+ { 0, 0 }
+};
+
+/*
+ * i2c_hid_lookup_quirk: return any quirks associated with a I2C HID device
+ * @idVendor: the 16-bit vendor ID
+ * @idProduct: the 16-bit product ID
+ *
+ * Returns: a u32 quirks value.
+ */
+static u32 i2c_hid_lookup_quirk(const u16 idVendor, const u16 idProduct)
+{
+ u32 quirks = 0;
+ int n;
+
+ for (n = 0; i2c_hid_quirks[n].idVendor; n++)
+ if (i2c_hid_quirks[n].idVendor == idVendor &&
+ (i2c_hid_quirks[n].idProduct == (__u16)HID_ANY_ID ||
+ i2c_hid_quirks[n].idProduct == idProduct))
+ quirks = i2c_hid_quirks[n].quirks;
+
+ return quirks;
+}
+
+static int __i2c_hid_command(struct i2c_client *client,
+ const struct i2c_hid_cmd *command, u8 reportID,
+ u8 reportType, u8 *args, int args_len,
+ unsigned char *buf_recv, int data_len)
+{
+ struct i2c_hid *ihid = i2c_get_clientdata(client);
+ union command *cmd = (union command *)ihid->cmdbuf;
+ int ret;
+ struct i2c_msg msg[2];
+ int msg_num = 1;
+
+ int length = command->length;
+ bool wait = command->wait;
+ unsigned int registerIndex = command->registerIndex;
+
+ /* special case for hid_descr_cmd */
+ if (command == &hid_descr_cmd) {
+ cmd->c.reg = ihid->wHIDDescRegister;
+ } else {
+ cmd->data[0] = ihid->hdesc_buffer[registerIndex];
+ cmd->data[1] = ihid->hdesc_buffer[registerIndex + 1];
+ }
+
+ if (length > 2) {
+ cmd->c.opcode = command->opcode;
+ cmd->c.reportTypeID = reportID | reportType << 4;
+ }
+
+ memcpy(cmd->data + length, args, args_len);
+ length += args_len;
+
+ i2c_hid_dbg(ihid, "%s: cmd=%*ph\n", __func__, length, cmd->data);
+
+ msg[0].addr = client->addr;
+ msg[0].flags = client->flags & I2C_M_TEN;
+ msg[0].len = length;
+ msg[0].buf = cmd->data;
+ if (data_len > 0) {
+ msg[1].addr = client->addr;
+ msg[1].flags = client->flags & I2C_M_TEN;
+ msg[1].flags |= I2C_M_RD;
+ msg[1].len = data_len;
+ msg[1].buf = buf_recv;
+ msg_num = 2;
+ set_bit(I2C_HID_READ_PENDING, &ihid->flags);
+ }
+
+ if (wait)
+ set_bit(I2C_HID_RESET_PENDING, &ihid->flags);
+
+ ret = i2c_transfer(client->adapter, msg, msg_num);
+
+ if (data_len > 0)
+ clear_bit(I2C_HID_READ_PENDING, &ihid->flags);
+
+ if (ret != msg_num)
+ return ret < 0 ? ret : -EIO;
+
+ ret = 0;
+
+ if (wait) {
+ i2c_hid_dbg(ihid, "%s: waiting...\n", __func__);
+ if (!wait_event_timeout(ihid->wait,
+ !test_bit(I2C_HID_RESET_PENDING, &ihid->flags),
+ msecs_to_jiffies(5000)))
+ ret = -ENODATA;
+ i2c_hid_dbg(ihid, "%s: finished.\n", __func__);
+ }
+
+ return ret;
+}
+
+static int i2c_hid_command(struct i2c_client *client,
+ const struct i2c_hid_cmd *command,
+ unsigned char *buf_recv, int data_len)
+{
+ return __i2c_hid_command(client, command, 0, 0, NULL, 0,
+ buf_recv, data_len);
+}
+
+static int i2c_hid_get_report(struct i2c_client *client, u8 reportType,
+ u8 reportID, unsigned char *buf_recv, int data_len)
+{
+ struct i2c_hid *ihid = i2c_get_clientdata(client);
+ u8 args[3];
+ int ret;
+ int args_len = 0;
+ u16 readRegister = le16_to_cpu(ihid->hdesc.wDataRegister);
+
+ i2c_hid_dbg(ihid, "%s\n", __func__);
+
+ if (reportID >= 0x0F) {
+ args[args_len++] = reportID;
+ reportID = 0x0F;
+ }
+
+ args[args_len++] = readRegister & 0xFF;
+ args[args_len++] = readRegister >> 8;
+
+ ret = __i2c_hid_command(client, &hid_get_report_cmd, reportID,
+ reportType, args, args_len, buf_recv, data_len);
+ if (ret) {
+ dev_err(&client->dev,
+ "failed to retrieve report from device.\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+/**
+ * i2c_hid_set_or_send_report: forward an incoming report to the device
+ * @client: the i2c_client of the device
+ * @reportType: 0x03 for HID_FEATURE_REPORT ; 0x02 for HID_OUTPUT_REPORT
+ * @reportID: the report ID
+ * @buf: the actual data to transfer, without the report ID
+ * @len: size of buf
+ * @use_data: true: use SET_REPORT HID command, false: send plain OUTPUT report
+ */
+static int i2c_hid_set_or_send_report(struct i2c_client *client, u8 reportType,
+ u8 reportID, unsigned char *buf, size_t data_len, bool use_data)
+{
+ struct i2c_hid *ihid = i2c_get_clientdata(client);
+ u8 *args = ihid->argsbuf;
+ const struct i2c_hid_cmd *hidcmd;
+ int ret;
+ u16 dataRegister = le16_to_cpu(ihid->hdesc.wDataRegister);
+ u16 outputRegister = le16_to_cpu(ihid->hdesc.wOutputRegister);
+ u16 maxOutputLength = le16_to_cpu(ihid->hdesc.wMaxOutputLength);
+ u16 size;
+ int args_len;
+ int index = 0;
+
+ i2c_hid_dbg(ihid, "%s\n", __func__);
+
+ if (data_len > ihid->bufsize)
+ return -EINVAL;
+
+ size = 2 /* size */ +
+ (reportID ? 1 : 0) /* reportID */ +
+ data_len /* buf */;
+ args_len = (reportID >= 0x0F ? 1 : 0) /* optional third byte */ +
+ 2 /* dataRegister */ +
+ size /* args */;
+
+ if (!use_data && maxOutputLength == 0)
+ return -ENOSYS;
+
+ if (reportID >= 0x0F) {
+ args[index++] = reportID;
+ reportID = 0x0F;
+ }
+
+ /*
+ * use the data register for feature reports or if the device does not
+ * support the output register
+ */
+ if (use_data) {
+ args[index++] = dataRegister & 0xFF;
+ args[index++] = dataRegister >> 8;
+ hidcmd = &hid_set_report_cmd;
+ } else {
+ args[index++] = outputRegister & 0xFF;
+ args[index++] = outputRegister >> 8;
+ hidcmd = &hid_no_cmd;
+ }
+
+ args[index++] = size & 0xFF;
+ args[index++] = size >> 8;
+
+ if (reportID)
+ args[index++] = reportID;
+
+ memcpy(&args[index], buf, data_len);
+
+ ret = __i2c_hid_command(client, hidcmd, reportID,
+ reportType, args, args_len, NULL, 0);
+ if (ret) {
+ dev_err(&client->dev, "failed to set a report to device.\n");
+ return ret;
+ }
+
+ return data_len;
+}
+
+static int i2c_hid_set_power(struct i2c_client *client, int power_state)
+{
+ struct i2c_hid *ihid = i2c_get_clientdata(client);
+ int ret;
+
+ i2c_hid_dbg(ihid, "%s\n", __func__);
+
+ /*
+ * Some devices require to send a command to wakeup before power on.
+ * The call will get a return value (EREMOTEIO) but device will be
+ * triggered and activated. After that, it goes like a normal device.
+ */
+ if (power_state == I2C_HID_PWR_ON &&
+ ihid->quirks & I2C_HID_QUIRK_SET_PWR_WAKEUP_DEV) {
+ ret = i2c_hid_command(client, &hid_set_power_cmd, NULL, 0);
+
+ /* Device was already activated */
+ if (!ret)
+ goto set_pwr_exit;
+ }
+
+ ret = __i2c_hid_command(client, &hid_set_power_cmd, power_state,
+ 0, NULL, 0, NULL, 0);
+
+ if (ret)
+ dev_err(&client->dev, "failed to change power setting.\n");
+
+set_pwr_exit:
+ return ret;
+}
+
+static int i2c_hid_hwreset(struct i2c_client *client)
+{
+ struct i2c_hid *ihid = i2c_get_clientdata(client);
+ int ret;
+
+ i2c_hid_dbg(ihid, "%s\n", __func__);
+
+ /*
+ * This prevents sending feature reports while the device is
+ * being reset. Otherwise we may lose the reset complete
+ * interrupt.
+ */
+ mutex_lock(&ihid->reset_lock);
+
+ ret = i2c_hid_set_power(client, I2C_HID_PWR_ON);
+ if (ret)
+ goto out_unlock;
+
+ /*
+ * The HID over I2C specification states that if a DEVICE needs time
+ * after the PWR_ON request, it should utilise CLOCK stretching.
+ * However, it has been observered that the Windows driver provides a
+ * 1ms sleep between the PWR_ON and RESET requests and that some devices
+ * rely on this.
+ */
+ usleep_range(1000, 5000);
+
+ i2c_hid_dbg(ihid, "resetting...\n");
+
+ ret = i2c_hid_command(client, &hid_reset_cmd, NULL, 0);
+ if (ret) {
+ dev_err(&client->dev, "failed to reset device.\n");
+ i2c_hid_set_power(client, I2C_HID_PWR_SLEEP);
+ }
+
+out_unlock:
+ mutex_unlock(&ihid->reset_lock);
+ return ret;
+}
+
+static void i2c_hid_get_input(struct i2c_hid *ihid)
+{
+ int ret;
+ u32 ret_size;
+ int size = le16_to_cpu(ihid->hdesc.wMaxInputLength);
+
+ if (size > ihid->bufsize)
+ size = ihid->bufsize;
+
+ ret = i2c_master_recv(ihid->client, ihid->inbuf, size);
+ if (ret != size) {
+ if (ret < 0)
+ return;
+
+ dev_err(&ihid->client->dev, "%s: got %d data instead of %d\n",
+ __func__, ret, size);
+ return;
+ }
+
+ ret_size = ihid->inbuf[0] | ihid->inbuf[1] << 8;
+
+ if (!ret_size) {
+ /* host or device initiated RESET completed */
+ if (test_and_clear_bit(I2C_HID_RESET_PENDING, &ihid->flags))
+ wake_up(&ihid->wait);
+ return;
+ }
+
+ if ((ret_size > size) || (ret_size < 2)) {
+ dev_err(&ihid->client->dev, "%s: incomplete report (%d/%d)\n",
+ __func__, size, ret_size);
+ return;
+ }
+
+ i2c_hid_dbg(ihid, "input: %*ph\n", ret_size, ihid->inbuf);
+
+ if (test_bit(I2C_HID_STARTED, &ihid->flags))
+ hid_input_report(ihid->hid, HID_INPUT_REPORT, ihid->inbuf + 2,
+ ret_size - 2, 1);
+
+ return;
+}
+
+static irqreturn_t i2c_hid_irq(int irq, void *dev_id)
+{
+ struct i2c_hid *ihid = dev_id;
+
+ if (test_bit(I2C_HID_READ_PENDING, &ihid->flags))
+ return IRQ_HANDLED;
+
+ i2c_hid_get_input(ihid);
+
+ return IRQ_HANDLED;
+}
+
+static int i2c_hid_get_report_length(struct hid_report *report)
+{
+ return ((report->size - 1) >> 3) + 1 +
+ report->device->report_enum[report->type].numbered + 2;
+}
+
+/*
+ * Traverse the supplied list of reports and find the longest
+ */
+static void i2c_hid_find_max_report(struct hid_device *hid, unsigned int type,
+ unsigned int *max)
+{
+ struct hid_report *report;
+ unsigned int size;
+
+ /* We should not rely on wMaxInputLength, as some devices may set it to
+ * a wrong length. */
+ list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
+ size = i2c_hid_get_report_length(report);
+ if (*max < size)
+ *max = size;
+ }
+}
+
+static void i2c_hid_free_buffers(struct i2c_hid *ihid)
+{
+ kfree(ihid->inbuf);
+ kfree(ihid->rawbuf);
+ kfree(ihid->argsbuf);
+ kfree(ihid->cmdbuf);
+ ihid->inbuf = NULL;
+ ihid->rawbuf = NULL;
+ ihid->cmdbuf = NULL;
+ ihid->argsbuf = NULL;
+ ihid->bufsize = 0;
+}
+
+static int i2c_hid_alloc_buffers(struct i2c_hid *ihid, size_t report_size)
+{
+ /* the worst case is computed from the set_report command with a
+ * reportID > 15 and the maximum report length */
+ int args_len = sizeof(__u8) + /* ReportID */
+ sizeof(__u8) + /* optional ReportID byte */
+ sizeof(__u16) + /* data register */
+ sizeof(__u16) + /* size of the report */
+ report_size; /* report */
+
+ ihid->inbuf = kzalloc(report_size, GFP_KERNEL);
+ ihid->rawbuf = kzalloc(report_size, GFP_KERNEL);
+ ihid->argsbuf = kzalloc(args_len, GFP_KERNEL);
+ ihid->cmdbuf = kzalloc(sizeof(union command) + args_len, GFP_KERNEL);
+
+ if (!ihid->inbuf || !ihid->rawbuf || !ihid->argsbuf || !ihid->cmdbuf) {
+ i2c_hid_free_buffers(ihid);
+ return -ENOMEM;
+ }
+
+ ihid->bufsize = report_size;
+
+ return 0;
+}
+
+static int i2c_hid_get_raw_report(struct hid_device *hid,
+ unsigned char report_number, __u8 *buf, size_t count,
+ unsigned char report_type)
+{
+ struct i2c_client *client = hid->driver_data;
+ struct i2c_hid *ihid = i2c_get_clientdata(client);
+ size_t ret_count, ask_count;
+ int ret;
+
+ if (report_type == HID_OUTPUT_REPORT)
+ return -EINVAL;
+
+ /* +2 bytes to include the size of the reply in the query buffer */
+ ask_count = min(count + 2, (size_t)ihid->bufsize);
+
+ ret = i2c_hid_get_report(client,
+ report_type == HID_FEATURE_REPORT ? 0x03 : 0x01,
+ report_number, ihid->rawbuf, ask_count);
+
+ if (ret < 0)
+ return ret;
+
+ ret_count = ihid->rawbuf[0] | (ihid->rawbuf[1] << 8);
+
+ if (ret_count <= 2)
+ return 0;
+
+ ret_count = min(ret_count, ask_count);
+
+ /* The query buffer contains the size, dropping it in the reply */
+ count = min(count, ret_count - 2);
+ memcpy(buf, ihid->rawbuf + 2, count);
+
+ return count;
+}
+
+static int i2c_hid_output_raw_report(struct hid_device *hid, __u8 *buf,
+ size_t count, unsigned char report_type, bool use_data)
+{
+ struct i2c_client *client = hid->driver_data;
+ struct i2c_hid *ihid = i2c_get_clientdata(client);
+ int report_id = buf[0];
+ int ret;
+
+ if (report_type == HID_INPUT_REPORT)
+ return -EINVAL;
+
+ mutex_lock(&ihid->reset_lock);
+
+ if (report_id) {
+ buf++;
+ count--;
+ }
+
+ ret = i2c_hid_set_or_send_report(client,
+ report_type == HID_FEATURE_REPORT ? 0x03 : 0x02,
+ report_id, buf, count, use_data);
+
+ if (report_id && ret >= 0)
+ ret++; /* add report_id to the number of transfered bytes */
+
+ mutex_unlock(&ihid->reset_lock);
+
+ return ret;
+}
+
+static int i2c_hid_output_report(struct hid_device *hid, __u8 *buf,
+ size_t count)
+{
+ return i2c_hid_output_raw_report(hid, buf, count, HID_OUTPUT_REPORT,
+ false);
+}
+
+static int i2c_hid_raw_request(struct hid_device *hid, unsigned char reportnum,
+ __u8 *buf, size_t len, unsigned char rtype,
+ int reqtype)
+{
+ switch (reqtype) {
+ case HID_REQ_GET_REPORT:
+ return i2c_hid_get_raw_report(hid, reportnum, buf, len, rtype);
+ case HID_REQ_SET_REPORT:
+ if (buf[0] != reportnum)
+ return -EINVAL;
+ return i2c_hid_output_raw_report(hid, buf, len, rtype, true);
+ default:
+ return -EIO;
+ }
+}
+
+static int i2c_hid_parse(struct hid_device *hid)
+{
+ struct i2c_client *client = hid->driver_data;
+ struct i2c_hid *ihid = i2c_get_clientdata(client);
+ struct i2c_hid_desc *hdesc = &ihid->hdesc;
+ unsigned int rsize;
+ char *rdesc;
+ int ret;
+ int tries = 3;
+ char *use_override;
+
+ i2c_hid_dbg(ihid, "entering %s\n", __func__);
+
+ rsize = le16_to_cpu(hdesc->wReportDescLength);
+ if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
+ dbg_hid("weird size of report descriptor (%u)\n", rsize);
+ return -EINVAL;
+ }
+
+ do {
+ ret = i2c_hid_hwreset(client);
+ if (ret)
+ msleep(1000);
+ } while (tries-- > 0 && ret);
+
+ if (ret)
+ return ret;
+
+ use_override = i2c_hid_get_dmi_hid_report_desc_override(client->name,
+ &rsize);
+
+ if (use_override) {
+ rdesc = use_override;
+ i2c_hid_dbg(ihid, "Using a HID report descriptor override\n");
+ } else {
+ rdesc = kzalloc(rsize, GFP_KERNEL);
+
+ if (!rdesc) {
+ dbg_hid("couldn't allocate rdesc memory\n");
+ return -ENOMEM;
+ }
+
+ i2c_hid_dbg(ihid, "asking HID report descriptor\n");
+
+ ret = i2c_hid_command(client, &hid_report_descr_cmd,
+ rdesc, rsize);
+ if (ret) {
+ hid_err(hid, "reading report descriptor failed\n");
+ kfree(rdesc);
+ return -EIO;
+ }
+ }
+
+ i2c_hid_dbg(ihid, "Report Descriptor: %*ph\n", rsize, rdesc);
+
+ ret = hid_parse_report(hid, rdesc, rsize);
+ if (!use_override)
+ kfree(rdesc);
+
+ if (ret) {
+ dbg_hid("parsing report descriptor failed\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int i2c_hid_start(struct hid_device *hid)
+{
+ struct i2c_client *client = hid->driver_data;
+ struct i2c_hid *ihid = i2c_get_clientdata(client);
+ int ret;
+ unsigned int bufsize = HID_MIN_BUFFER_SIZE;
+
+ i2c_hid_find_max_report(hid, HID_INPUT_REPORT, &bufsize);
+ i2c_hid_find_max_report(hid, HID_OUTPUT_REPORT, &bufsize);
+ i2c_hid_find_max_report(hid, HID_FEATURE_REPORT, &bufsize);
+
+ if (bufsize > ihid->bufsize) {
+ disable_irq(client->irq);
+ i2c_hid_free_buffers(ihid);
+
+ ret = i2c_hid_alloc_buffers(ihid, bufsize);
+ enable_irq(client->irq);
+
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static void i2c_hid_stop(struct hid_device *hid)
+{
+ hid->claimed = 0;
+}
+
+static int i2c_hid_open(struct hid_device *hid)
+{
+ struct i2c_client *client = hid->driver_data;
+ struct i2c_hid *ihid = i2c_get_clientdata(client);
+ int ret = 0;
+
+ ret = pm_runtime_get_sync(&client->dev);
+ if (ret < 0)
+ return ret;
+
+ set_bit(I2C_HID_STARTED, &ihid->flags);
+ return 0;
+}
+
+static void i2c_hid_close(struct hid_device *hid)
+{
+ struct i2c_client *client = hid->driver_data;
+ struct i2c_hid *ihid = i2c_get_clientdata(client);
+
+ clear_bit(I2C_HID_STARTED, &ihid->flags);
+
+ /* Save some power */
+ pm_runtime_put(&client->dev);
+}
+
+static int i2c_hid_power(struct hid_device *hid, int lvl)
+{
+ struct i2c_client *client = hid->driver_data;
+ struct i2c_hid *ihid = i2c_get_clientdata(client);
+
+ i2c_hid_dbg(ihid, "%s lvl:%d\n", __func__, lvl);
+
+ switch (lvl) {
+ case PM_HINT_FULLON:
+ pm_runtime_get_sync(&client->dev);
+ break;
+ case PM_HINT_NORMAL:
+ pm_runtime_put(&client->dev);
+ break;
+ }
+ return 0;
+}
+
+struct hid_ll_driver i2c_hid_ll_driver = {
+ .parse = i2c_hid_parse,
+ .start = i2c_hid_start,
+ .stop = i2c_hid_stop,
+ .open = i2c_hid_open,
+ .close = i2c_hid_close,
+ .power = i2c_hid_power,
+ .output_report = i2c_hid_output_report,
+ .raw_request = i2c_hid_raw_request,
+};
+EXPORT_SYMBOL_GPL(i2c_hid_ll_driver);
+
+static int i2c_hid_init_irq(struct i2c_client *client)
+{
+ struct i2c_hid *ihid = i2c_get_clientdata(client);
+ unsigned long irqflags = 0;
+ int ret;
+
+ dev_dbg(&client->dev, "Requesting IRQ: %d\n", client->irq);
+
+ if (!irq_get_trigger_type(client->irq))
+ irqflags = IRQF_TRIGGER_LOW;
+
+ ret = request_threaded_irq(client->irq, NULL, i2c_hid_irq,
+ irqflags | IRQF_ONESHOT, client->name, ihid);
+ if (ret < 0) {
+ dev_warn(&client->dev,
+ "Could not register for %s interrupt, irq = %d,"
+ " ret = %d\n",
+ client->name, client->irq, ret);
+
+ return ret;
+ }
+
+ return 0;
+}
+
+static int i2c_hid_fetch_hid_descriptor(struct i2c_hid *ihid)
+{
+ struct i2c_client *client = ihid->client;
+ struct i2c_hid_desc *hdesc = &ihid->hdesc;
+ unsigned int dsize;
+ int ret;
+
+ /* i2c hid fetch using a fixed descriptor size (30 bytes) */
+ if (i2c_hid_get_dmi_i2c_hid_desc_override(client->name)) {
+ i2c_hid_dbg(ihid, "Using a HID descriptor override\n");
+ ihid->hdesc =
+ *i2c_hid_get_dmi_i2c_hid_desc_override(client->name);
+ } else {
+ i2c_hid_dbg(ihid, "Fetching the HID descriptor\n");
+ ret = i2c_hid_command(client, &hid_descr_cmd,
+ ihid->hdesc_buffer,
+ sizeof(struct i2c_hid_desc));
+ if (ret) {
+ dev_err(&client->dev, "hid_descr_cmd failed\n");
+ return -ENODEV;
+ }
+ }
+
+ /* Validate the length of HID descriptor, the 4 first bytes:
+ * bytes 0-1 -> length
+ * bytes 2-3 -> bcdVersion (has to be 1.00) */
+ /* check bcdVersion == 1.0 */
+ if (le16_to_cpu(hdesc->bcdVersion) != 0x0100) {
+ dev_err(&client->dev,
+ "unexpected HID descriptor bcdVersion (0x%04hx)\n",
+ le16_to_cpu(hdesc->bcdVersion));
+ return -ENODEV;
+ }
+
+ /* Descriptor length should be 30 bytes as per the specification */
+ dsize = le16_to_cpu(hdesc->wHIDDescLength);
+ if (dsize != sizeof(struct i2c_hid_desc)) {
+ dev_err(&client->dev, "weird size of HID descriptor (%u)\n",
+ dsize);
+ return -ENODEV;
+ }
+ i2c_hid_dbg(ihid, "HID Descriptor: %*ph\n", dsize, ihid->hdesc_buffer);
+ return 0;
+}
+
+#ifdef CONFIG_ACPI
+static int i2c_hid_acpi_pdata(struct i2c_client *client,
+ struct i2c_hid_platform_data *pdata)
+{
+ static guid_t i2c_hid_guid =
+ GUID_INIT(0x3CDFF6F7, 0x4267, 0x4555,
+ 0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE);
+ union acpi_object *obj;
+ struct acpi_device *adev;
+ acpi_handle handle;
+
+ handle = ACPI_HANDLE(&client->dev);
+ if (!handle || acpi_bus_get_device(handle, &adev))
+ return -ENODEV;
+
+ obj = acpi_evaluate_dsm_typed(handle, &i2c_hid_guid, 1, 1, NULL,
+ ACPI_TYPE_INTEGER);
+ if (!obj) {
+ dev_err(&client->dev, "device _DSM execution failed\n");
+ return -ENODEV;
+ }
+
+ pdata->hid_descriptor_address = obj->integer.value;
+ ACPI_FREE(obj);
+
+ return 0;
+}
+
+static void i2c_hid_acpi_fix_up_power(struct device *dev)
+{
+ acpi_handle handle = ACPI_HANDLE(dev);
+ struct acpi_device *adev;
+
+ if (handle && acpi_bus_get_device(handle, &adev) == 0)
+ acpi_device_fix_up_power(adev);
+}
+
+static const struct acpi_device_id i2c_hid_acpi_match[] = {
+ {"ACPI0C50", 0 },
+ {"PNP0C50", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, i2c_hid_acpi_match);
+#else
+static inline int i2c_hid_acpi_pdata(struct i2c_client *client,
+ struct i2c_hid_platform_data *pdata)
+{
+ return -ENODEV;
+}
+
+static inline void i2c_hid_acpi_fix_up_power(struct device *dev) {}
+#endif
+
+#ifdef CONFIG_OF
+static int i2c_hid_of_probe(struct i2c_client *client,
+ struct i2c_hid_platform_data *pdata)
+{
+ struct device *dev = &client->dev;
+ u32 val;
+ int ret;
+
+ ret = of_property_read_u32(dev->of_node, "hid-descr-addr", &val);
+ if (ret) {
+ dev_err(&client->dev, "HID register address not provided\n");
+ return -ENODEV;
+ }
+ if (val >> 16) {
+ dev_err(&client->dev, "Bad HID register address: 0x%08x\n",
+ val);
+ return -EINVAL;
+ }
+ pdata->hid_descriptor_address = val;
+
+ ret = of_property_read_u32(dev->of_node, "post-power-on-delay-ms",
+ &val);
+ if (!ret)
+ pdata->post_power_delay_ms = val;
+
+ return 0;
+}
+
+static const struct of_device_id i2c_hid_of_match[] = {
+ { .compatible = "hid-over-i2c" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, i2c_hid_of_match);
+#else
+static inline int i2c_hid_of_probe(struct i2c_client *client,
+ struct i2c_hid_platform_data *pdata)
+{
+ return -ENODEV;
+}
+#endif
+
+static int i2c_hid_probe(struct i2c_client *client,
+ const struct i2c_device_id *dev_id)
+{
+ int ret;
+ struct i2c_hid *ihid;
+ struct hid_device *hid;
+ __u16 hidRegister;
+ struct i2c_hid_platform_data *platform_data = client->dev.platform_data;
+
+ dbg_hid("HID probe called for i2c 0x%02x\n", client->addr);
+
+ if (!client->irq) {
+ dev_err(&client->dev,
+ "HID over i2c has not been provided an Int IRQ\n");
+ return -EINVAL;
+ }
+
+ if (client->irq < 0) {
+ if (client->irq != -EPROBE_DEFER)
+ dev_err(&client->dev,
+ "HID over i2c doesn't have a valid IRQ\n");
+ return client->irq;
+ }
+
+ ihid = kzalloc(sizeof(struct i2c_hid), GFP_KERNEL);
+ if (!ihid)
+ return -ENOMEM;
+
+ if (client->dev.of_node) {
+ ret = i2c_hid_of_probe(client, &ihid->pdata);
+ if (ret)
+ goto err;
+ } else if (!platform_data) {
+ ret = i2c_hid_acpi_pdata(client, &ihid->pdata);
+ if (ret) {
+ dev_err(&client->dev,
+ "HID register address not provided\n");
+ goto err;
+ }
+ } else {
+ ihid->pdata = *platform_data;
+ }
+
+ ihid->pdata.supply = devm_regulator_get(&client->dev, "vdd");
+ if (IS_ERR(ihid->pdata.supply)) {
+ ret = PTR_ERR(ihid->pdata.supply);
+ if (ret != -EPROBE_DEFER)
+ dev_err(&client->dev, "Failed to get regulator: %d\n",
+ ret);
+ goto err;
+ }
+
+ ret = regulator_enable(ihid->pdata.supply);
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed to enable regulator: %d\n",
+ ret);
+ goto err;
+ }
+ if (ihid->pdata.post_power_delay_ms)
+ msleep(ihid->pdata.post_power_delay_ms);
+
+ i2c_set_clientdata(client, ihid);
+
+ ihid->client = client;
+
+ hidRegister = ihid->pdata.hid_descriptor_address;
+ ihid->wHIDDescRegister = cpu_to_le16(hidRegister);
+
+ init_waitqueue_head(&ihid->wait);
+ mutex_init(&ihid->reset_lock);
+
+ /* we need to allocate the command buffer without knowing the maximum
+ * size of the reports. Let's use HID_MIN_BUFFER_SIZE, then we do the
+ * real computation later. */
+ ret = i2c_hid_alloc_buffers(ihid, HID_MIN_BUFFER_SIZE);
+ if (ret < 0)
+ goto err_regulator;
+
+ i2c_hid_acpi_fix_up_power(&client->dev);
+
+ pm_runtime_get_noresume(&client->dev);
+ pm_runtime_set_active(&client->dev);
+ pm_runtime_enable(&client->dev);
+ device_enable_async_suspend(&client->dev);
+
+ /* Make sure there is something at this address */
+ ret = i2c_smbus_read_byte(client);
+ if (ret < 0) {
+ dev_dbg(&client->dev, "nothing at this address: %d\n", ret);
+ ret = -ENXIO;
+ goto err_pm;
+ }
+
+ ret = i2c_hid_fetch_hid_descriptor(ihid);
+ if (ret < 0)
+ goto err_pm;
+
+ ret = i2c_hid_init_irq(client);
+ if (ret < 0)
+ goto err_pm;
+
+ hid = hid_allocate_device();
+ if (IS_ERR(hid)) {
+ ret = PTR_ERR(hid);
+ goto err_irq;
+ }
+
+ ihid->hid = hid;
+
+ hid->driver_data = client;
+ hid->ll_driver = &i2c_hid_ll_driver;
+ hid->dev.parent = &client->dev;
+ hid->bus = BUS_I2C;
+ hid->version = le16_to_cpu(ihid->hdesc.bcdVersion);
+ hid->vendor = le16_to_cpu(ihid->hdesc.wVendorID);
+ hid->product = le16_to_cpu(ihid->hdesc.wProductID);
+
+ snprintf(hid->name, sizeof(hid->name), "%s %04hX:%04hX",
+ client->name, hid->vendor, hid->product);
+ strlcpy(hid->phys, dev_name(&client->dev), sizeof(hid->phys));
+
+ ihid->quirks = i2c_hid_lookup_quirk(hid->vendor, hid->product);
+
+ ret = hid_add_device(hid);
+ if (ret) {
+ if (ret != -ENODEV)
+ hid_err(client, "can't add hid device: %d\n", ret);
+ goto err_mem_free;
+ }
+
+ pm_runtime_put(&client->dev);
+ return 0;
+
+err_mem_free:
+ hid_destroy_device(hid);
+
+err_irq:
+ free_irq(client->irq, ihid);
+
+err_pm:
+ pm_runtime_put_noidle(&client->dev);
+ pm_runtime_disable(&client->dev);
+
+err_regulator:
+ regulator_disable(ihid->pdata.supply);
+
+err:
+ i2c_hid_free_buffers(ihid);
+ kfree(ihid);
+ return ret;
+}
+
+static int i2c_hid_remove(struct i2c_client *client)
+{
+ struct i2c_hid *ihid = i2c_get_clientdata(client);
+ struct hid_device *hid;
+
+ pm_runtime_get_sync(&client->dev);
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+ pm_runtime_put_noidle(&client->dev);
+
+ hid = ihid->hid;
+ hid_destroy_device(hid);
+
+ free_irq(client->irq, ihid);
+
+ if (ihid->bufsize)
+ i2c_hid_free_buffers(ihid);
+
+ regulator_disable(ihid->pdata.supply);
+
+ kfree(ihid);
+
+ return 0;
+}
+
+static void i2c_hid_shutdown(struct i2c_client *client)
+{
+ struct i2c_hid *ihid = i2c_get_clientdata(client);
+
+ i2c_hid_set_power(client, I2C_HID_PWR_SLEEP);
+ free_irq(client->irq, ihid);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int i2c_hid_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct i2c_hid *ihid = i2c_get_clientdata(client);
+ struct hid_device *hid = ihid->hid;
+ int ret;
+ int wake_status;
+
+ if (hid->driver && hid->driver->suspend) {
+ /*
+ * Wake up the device so that IO issues in
+ * HID driver's suspend code can succeed.
+ */
+ ret = pm_runtime_resume(dev);
+ if (ret < 0)
+ return ret;
+
+ ret = hid->driver->suspend(hid, PMSG_SUSPEND);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (!pm_runtime_suspended(dev)) {
+ /* Save some power */
+ i2c_hid_set_power(client, I2C_HID_PWR_SLEEP);
+
+ disable_irq(client->irq);
+ }
+
+ if (device_may_wakeup(&client->dev)) {
+ wake_status = enable_irq_wake(client->irq);
+ if (!wake_status)
+ ihid->irq_wake_enabled = true;
+ else
+ hid_warn(hid, "Failed to enable irq wake: %d\n",
+ wake_status);
+ } else {
+ ret = regulator_disable(ihid->pdata.supply);
+ if (ret < 0)
+ hid_warn(hid, "Failed to disable supply: %d\n", ret);
+ }
+
+ return 0;
+}
+
+static int i2c_hid_resume(struct device *dev)
+{
+ int ret;
+ struct i2c_client *client = to_i2c_client(dev);
+ struct i2c_hid *ihid = i2c_get_clientdata(client);
+ struct hid_device *hid = ihid->hid;
+ int wake_status;
+
+ if (!device_may_wakeup(&client->dev)) {
+ ret = regulator_enable(ihid->pdata.supply);
+ if (ret < 0)
+ hid_warn(hid, "Failed to enable supply: %d\n", ret);
+ if (ihid->pdata.post_power_delay_ms)
+ msleep(ihid->pdata.post_power_delay_ms);
+ } else if (ihid->irq_wake_enabled) {
+ wake_status = disable_irq_wake(client->irq);
+ if (!wake_status)
+ ihid->irq_wake_enabled = false;
+ else
+ hid_warn(hid, "Failed to disable irq wake: %d\n",
+ wake_status);
+ }
+
+ /* We'll resume to full power */
+ pm_runtime_disable(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+
+ enable_irq(client->irq);
+ ret = i2c_hid_hwreset(client);
+ if (ret)
+ return ret;
+
+ if (hid->driver && hid->driver->reset_resume) {
+ ret = hid->driver->reset_resume(hid);
+ return ret;
+ }
+
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_PM
+static int i2c_hid_runtime_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+
+ i2c_hid_set_power(client, I2C_HID_PWR_SLEEP);
+ disable_irq(client->irq);
+ return 0;
+}
+
+static int i2c_hid_runtime_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+
+ enable_irq(client->irq);
+ i2c_hid_set_power(client, I2C_HID_PWR_ON);
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops i2c_hid_pm = {
+ SET_SYSTEM_SLEEP_PM_OPS(i2c_hid_suspend, i2c_hid_resume)
+ SET_RUNTIME_PM_OPS(i2c_hid_runtime_suspend, i2c_hid_runtime_resume,
+ NULL)
+};
+
+static const struct i2c_device_id i2c_hid_id_table[] = {
+ { "hid", 0 },
+ { "hid-over-i2c", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, i2c_hid_id_table);
+
+
+static struct i2c_driver i2c_hid_driver = {
+ .driver = {
+ .name = "i2c_hid",
+ .pm = &i2c_hid_pm,
+ .acpi_match_table = ACPI_PTR(i2c_hid_acpi_match),
+ .of_match_table = of_match_ptr(i2c_hid_of_match),
+ },
+
+ .probe = i2c_hid_probe,
+ .remove = i2c_hid_remove,
+ .shutdown = i2c_hid_shutdown,
+ .id_table = i2c_hid_id_table,
+};
+
+module_i2c_driver(i2c_hid_driver);
+
+MODULE_DESCRIPTION("HID over I2C core driver");
+MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/hid/i2c-hid/i2c-hid-dmi-quirks.c b/drivers/hid/i2c-hid/i2c-hid-dmi-quirks.c
new file mode 100644
index 000000000000..1d645c9ab417
--- /dev/null
+++ b/drivers/hid/i2c-hid/i2c-hid-dmi-quirks.c
@@ -0,0 +1,376 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/*
+ * Quirks for I2C-HID devices that do not supply proper descriptors
+ *
+ * Copyright (c) 2018 Julian Sax <jsbc@gmx.de>
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/dmi.h>
+#include <linux/mod_devicetable.h>
+
+#include "i2c-hid.h"
+
+
+struct i2c_hid_desc_override {
+ union {
+ struct i2c_hid_desc *i2c_hid_desc;
+ uint8_t *i2c_hid_desc_buffer;
+ };
+ uint8_t *hid_report_desc;
+ unsigned int hid_report_desc_size;
+ uint8_t *i2c_name;
+};
+
+
+/*
+ * descriptors for the SIPODEV SP1064 touchpad
+ *
+ * This device does not supply any descriptors and on windows a filter
+ * driver operates between the i2c-hid layer and the device and injects
+ * these descriptors when the device is prompted. The descriptors were
+ * extracted by listening to the i2c-hid traffic that occurs between the
+ * windows filter driver and the windows i2c-hid driver.
+ */
+
+static const struct i2c_hid_desc_override sipodev_desc = {
+ .i2c_hid_desc_buffer = (uint8_t [])
+ {0x1e, 0x00, /* Length of descriptor */
+ 0x00, 0x01, /* Version of descriptor */
+ 0xdb, 0x01, /* Length of report descriptor */
+ 0x21, 0x00, /* Location of report descriptor */
+ 0x24, 0x00, /* Location of input report */
+ 0x1b, 0x00, /* Max input report length */
+ 0x25, 0x00, /* Location of output report */
+ 0x11, 0x00, /* Max output report length */
+ 0x22, 0x00, /* Location of command register */
+ 0x23, 0x00, /* Location of data register */
+ 0x11, 0x09, /* Vendor ID */
+ 0x88, 0x52, /* Product ID */
+ 0x06, 0x00, /* Version ID */
+ 0x00, 0x00, 0x00, 0x00 /* Reserved */
+ },
+
+ .hid_report_desc = (uint8_t [])
+ {0x05, 0x01, /* Usage Page (Desktop), */
+ 0x09, 0x02, /* Usage (Mouse), */
+ 0xA1, 0x01, /* Collection (Application), */
+ 0x85, 0x01, /* Report ID (1), */
+ 0x09, 0x01, /* Usage (Pointer), */
+ 0xA1, 0x00, /* Collection (Physical), */
+ 0x05, 0x09, /* Usage Page (Button), */
+ 0x19, 0x01, /* Usage Minimum (01h), */
+ 0x29, 0x02, /* Usage Maximum (02h), */
+ 0x25, 0x01, /* Logical Maximum (1), */
+ 0x75, 0x01, /* Report Size (1), */
+ 0x95, 0x02, /* Report Count (2), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0x95, 0x06, /* Report Count (6), */
+ 0x81, 0x01, /* Input (Constant), */
+ 0x05, 0x01, /* Usage Page (Desktop), */
+ 0x09, 0x30, /* Usage (X), */
+ 0x09, 0x31, /* Usage (Y), */
+ 0x15, 0x81, /* Logical Minimum (-127), */
+ 0x25, 0x7F, /* Logical Maximum (127), */
+ 0x75, 0x08, /* Report Size (8), */
+ 0x95, 0x02, /* Report Count (2), */
+ 0x81, 0x06, /* Input (Variable, Relative), */
+ 0xC0, /* End Collection, */
+ 0xC0, /* End Collection, */
+ 0x05, 0x0D, /* Usage Page (Digitizer), */
+ 0x09, 0x05, /* Usage (Touchpad), */
+ 0xA1, 0x01, /* Collection (Application), */
+ 0x85, 0x04, /* Report ID (4), */
+ 0x05, 0x0D, /* Usage Page (Digitizer), */
+ 0x09, 0x22, /* Usage (Finger), */
+ 0xA1, 0x02, /* Collection (Logical), */
+ 0x15, 0x00, /* Logical Minimum (0), */
+ 0x25, 0x01, /* Logical Maximum (1), */
+ 0x09, 0x47, /* Usage (Touch Valid), */
+ 0x09, 0x42, /* Usage (Tip Switch), */
+ 0x95, 0x02, /* Report Count (2), */
+ 0x75, 0x01, /* Report Size (1), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0x95, 0x01, /* Report Count (1), */
+ 0x75, 0x03, /* Report Size (3), */
+ 0x25, 0x05, /* Logical Maximum (5), */
+ 0x09, 0x51, /* Usage (Contact Identifier), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0x75, 0x01, /* Report Size (1), */
+ 0x95, 0x03, /* Report Count (3), */
+ 0x81, 0x03, /* Input (Constant, Variable), */
+ 0x05, 0x01, /* Usage Page (Desktop), */
+ 0x26, 0x44, 0x0A, /* Logical Maximum (2628), */
+ 0x75, 0x10, /* Report Size (16), */
+ 0x55, 0x0E, /* Unit Exponent (14), */
+ 0x65, 0x11, /* Unit (Centimeter), */
+ 0x09, 0x30, /* Usage (X), */
+ 0x46, 0x1A, 0x04, /* Physical Maximum (1050), */
+ 0x95, 0x01, /* Report Count (1), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0x46, 0xBC, 0x02, /* Physical Maximum (700), */
+ 0x26, 0x34, 0x05, /* Logical Maximum (1332), */
+ 0x09, 0x31, /* Usage (Y), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0xC0, /* End Collection, */
+ 0x05, 0x0D, /* Usage Page (Digitizer), */
+ 0x09, 0x22, /* Usage (Finger), */
+ 0xA1, 0x02, /* Collection (Logical), */
+ 0x25, 0x01, /* Logical Maximum (1), */
+ 0x09, 0x47, /* Usage (Touch Valid), */
+ 0x09, 0x42, /* Usage (Tip Switch), */
+ 0x95, 0x02, /* Report Count (2), */
+ 0x75, 0x01, /* Report Size (1), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0x95, 0x01, /* Report Count (1), */
+ 0x75, 0x03, /* Report Size (3), */
+ 0x25, 0x05, /* Logical Maximum (5), */
+ 0x09, 0x51, /* Usage (Contact Identifier), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0x75, 0x01, /* Report Size (1), */
+ 0x95, 0x03, /* Report Count (3), */
+ 0x81, 0x03, /* Input (Constant, Variable), */
+ 0x05, 0x01, /* Usage Page (Desktop), */
+ 0x26, 0x44, 0x0A, /* Logical Maximum (2628), */
+ 0x75, 0x10, /* Report Size (16), */
+ 0x09, 0x30, /* Usage (X), */
+ 0x46, 0x1A, 0x04, /* Physical Maximum (1050), */
+ 0x95, 0x01, /* Report Count (1), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0x46, 0xBC, 0x02, /* Physical Maximum (700), */
+ 0x26, 0x34, 0x05, /* Logical Maximum (1332), */
+ 0x09, 0x31, /* Usage (Y), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0xC0, /* End Collection, */
+ 0x05, 0x0D, /* Usage Page (Digitizer), */
+ 0x09, 0x22, /* Usage (Finger), */
+ 0xA1, 0x02, /* Collection (Logical), */
+ 0x25, 0x01, /* Logical Maximum (1), */
+ 0x09, 0x47, /* Usage (Touch Valid), */
+ 0x09, 0x42, /* Usage (Tip Switch), */
+ 0x95, 0x02, /* Report Count (2), */
+ 0x75, 0x01, /* Report Size (1), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0x95, 0x01, /* Report Count (1), */
+ 0x75, 0x03, /* Report Size (3), */
+ 0x25, 0x05, /* Logical Maximum (5), */
+ 0x09, 0x51, /* Usage (Contact Identifier), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0x75, 0x01, /* Report Size (1), */
+ 0x95, 0x03, /* Report Count (3), */
+ 0x81, 0x03, /* Input (Constant, Variable), */
+ 0x05, 0x01, /* Usage Page (Desktop), */
+ 0x26, 0x44, 0x0A, /* Logical Maximum (2628), */
+ 0x75, 0x10, /* Report Size (16), */
+ 0x09, 0x30, /* Usage (X), */
+ 0x46, 0x1A, 0x04, /* Physical Maximum (1050), */
+ 0x95, 0x01, /* Report Count (1), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0x46, 0xBC, 0x02, /* Physical Maximum (700), */
+ 0x26, 0x34, 0x05, /* Logical Maximum (1332), */
+ 0x09, 0x31, /* Usage (Y), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0xC0, /* End Collection, */
+ 0x05, 0x0D, /* Usage Page (Digitizer), */
+ 0x09, 0x22, /* Usage (Finger), */
+ 0xA1, 0x02, /* Collection (Logical), */
+ 0x25, 0x01, /* Logical Maximum (1), */
+ 0x09, 0x47, /* Usage (Touch Valid), */
+ 0x09, 0x42, /* Usage (Tip Switch), */
+ 0x95, 0x02, /* Report Count (2), */
+ 0x75, 0x01, /* Report Size (1), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0x95, 0x01, /* Report Count (1), */
+ 0x75, 0x03, /* Report Size (3), */
+ 0x25, 0x05, /* Logical Maximum (5), */
+ 0x09, 0x51, /* Usage (Contact Identifier), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0x75, 0x01, /* Report Size (1), */
+ 0x95, 0x03, /* Report Count (3), */
+ 0x81, 0x03, /* Input (Constant, Variable), */
+ 0x05, 0x01, /* Usage Page (Desktop), */
+ 0x26, 0x44, 0x0A, /* Logical Maximum (2628), */
+ 0x75, 0x10, /* Report Size (16), */
+ 0x09, 0x30, /* Usage (X), */
+ 0x46, 0x1A, 0x04, /* Physical Maximum (1050), */
+ 0x95, 0x01, /* Report Count (1), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0x46, 0xBC, 0x02, /* Physical Maximum (700), */
+ 0x26, 0x34, 0x05, /* Logical Maximum (1332), */
+ 0x09, 0x31, /* Usage (Y), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0xC0, /* End Collection, */
+ 0x05, 0x0D, /* Usage Page (Digitizer), */
+ 0x55, 0x0C, /* Unit Exponent (12), */
+ 0x66, 0x01, 0x10, /* Unit (Seconds), */
+ 0x47, 0xFF, 0xFF, 0x00, 0x00,/* Physical Maximum (65535), */
+ 0x27, 0xFF, 0xFF, 0x00, 0x00,/* Logical Maximum (65535), */
+ 0x75, 0x10, /* Report Size (16), */
+ 0x95, 0x01, /* Report Count (1), */
+ 0x09, 0x56, /* Usage (Scan Time), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0x09, 0x54, /* Usage (Contact Count), */
+ 0x25, 0x7F, /* Logical Maximum (127), */
+ 0x75, 0x08, /* Report Size (8), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0x05, 0x09, /* Usage Page (Button), */
+ 0x09, 0x01, /* Usage (01h), */
+ 0x25, 0x01, /* Logical Maximum (1), */
+ 0x75, 0x01, /* Report Size (1), */
+ 0x95, 0x01, /* Report Count (1), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0x95, 0x07, /* Report Count (7), */
+ 0x81, 0x03, /* Input (Constant, Variable), */
+ 0x05, 0x0D, /* Usage Page (Digitizer), */
+ 0x85, 0x02, /* Report ID (2), */
+ 0x09, 0x55, /* Usage (Contact Count Maximum), */
+ 0x09, 0x59, /* Usage (59h), */
+ 0x75, 0x04, /* Report Size (4), */
+ 0x95, 0x02, /* Report Count (2), */
+ 0x25, 0x0F, /* Logical Maximum (15), */
+ 0xB1, 0x02, /* Feature (Variable), */
+ 0x05, 0x0D, /* Usage Page (Digitizer), */
+ 0x85, 0x07, /* Report ID (7), */
+ 0x09, 0x60, /* Usage (60h), */
+ 0x75, 0x01, /* Report Size (1), */
+ 0x95, 0x01, /* Report Count (1), */
+ 0x25, 0x01, /* Logical Maximum (1), */
+ 0xB1, 0x02, /* Feature (Variable), */
+ 0x95, 0x07, /* Report Count (7), */
+ 0xB1, 0x03, /* Feature (Constant, Variable), */
+ 0x85, 0x06, /* Report ID (6), */
+ 0x06, 0x00, 0xFF, /* Usage Page (FF00h), */
+ 0x09, 0xC5, /* Usage (C5h), */
+ 0x26, 0xFF, 0x00, /* Logical Maximum (255), */
+ 0x75, 0x08, /* Report Size (8), */
+ 0x96, 0x00, 0x01, /* Report Count (256), */
+ 0xB1, 0x02, /* Feature (Variable), */
+ 0xC0, /* End Collection, */
+ 0x06, 0x00, 0xFF, /* Usage Page (FF00h), */
+ 0x09, 0x01, /* Usage (01h), */
+ 0xA1, 0x01, /* Collection (Application), */
+ 0x85, 0x0D, /* Report ID (13), */
+ 0x26, 0xFF, 0x00, /* Logical Maximum (255), */
+ 0x19, 0x01, /* Usage Minimum (01h), */
+ 0x29, 0x02, /* Usage Maximum (02h), */
+ 0x75, 0x08, /* Report Size (8), */
+ 0x95, 0x02, /* Report Count (2), */
+ 0xB1, 0x02, /* Feature (Variable), */
+ 0xC0, /* End Collection, */
+ 0x05, 0x0D, /* Usage Page (Digitizer), */
+ 0x09, 0x0E, /* Usage (Configuration), */
+ 0xA1, 0x01, /* Collection (Application), */
+ 0x85, 0x03, /* Report ID (3), */
+ 0x09, 0x22, /* Usage (Finger), */
+ 0xA1, 0x02, /* Collection (Logical), */
+ 0x09, 0x52, /* Usage (Device Mode), */
+ 0x25, 0x0A, /* Logical Maximum (10), */
+ 0x95, 0x01, /* Report Count (1), */
+ 0xB1, 0x02, /* Feature (Variable), */
+ 0xC0, /* End Collection, */
+ 0x09, 0x22, /* Usage (Finger), */
+ 0xA1, 0x00, /* Collection (Physical), */
+ 0x85, 0x05, /* Report ID (5), */
+ 0x09, 0x57, /* Usage (57h), */
+ 0x09, 0x58, /* Usage (58h), */
+ 0x75, 0x01, /* Report Size (1), */
+ 0x95, 0x02, /* Report Count (2), */
+ 0x25, 0x01, /* Logical Maximum (1), */
+ 0xB1, 0x02, /* Feature (Variable), */
+ 0x95, 0x06, /* Report Count (6), */
+ 0xB1, 0x03, /* Feature (Constant, Variable),*/
+ 0xC0, /* End Collection, */
+ 0xC0 /* End Collection */
+ },
+ .hid_report_desc_size = 475,
+ .i2c_name = "SYNA3602:00"
+};
+
+
+static const struct dmi_system_id i2c_hid_dmi_desc_override_table[] = {
+ {
+ .ident = "Teclast F6 Pro",
+ .matches = {
+ DMI_EXACT_MATCH(DMI_SYS_VENDOR, "TECLAST"),
+ DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "F6 Pro"),
+ },
+ .driver_data = (void *)&sipodev_desc
+ },
+ {
+ .ident = "Teclast F7",
+ .matches = {
+ DMI_EXACT_MATCH(DMI_SYS_VENDOR, "TECLAST"),
+ DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "F7"),
+ },
+ .driver_data = (void *)&sipodev_desc
+ },
+ {
+ .ident = "Trekstor Primebook C13",
+ .matches = {
+ DMI_EXACT_MATCH(DMI_SYS_VENDOR, "TREKSTOR"),
+ DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Primebook C13"),
+ },
+ .driver_data = (void *)&sipodev_desc
+ },
+ {
+ .ident = "Trekstor Primebook C11",
+ .matches = {
+ DMI_EXACT_MATCH(DMI_SYS_VENDOR, "TREKSTOR"),
+ DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Primebook C11"),
+ },
+ .driver_data = (void *)&sipodev_desc
+ },
+ {
+ .ident = "Direkt-Tek DTLAPY116-2",
+ .matches = {
+ DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Direkt-Tek"),
+ DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "DTLAPY116-2"),
+ },
+ .driver_data = (void *)&sipodev_desc
+ },
+ {
+ .ident = "Mediacom Flexbook Edge 11",
+ .matches = {
+ DMI_EXACT_MATCH(DMI_SYS_VENDOR, "MEDIACOM"),
+ DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "FlexBook edge11 - M-FBE11"),
+ },
+ .driver_data = (void *)&sipodev_desc
+ }
+};
+
+
+struct i2c_hid_desc *i2c_hid_get_dmi_i2c_hid_desc_override(uint8_t *i2c_name)
+{
+ struct i2c_hid_desc_override *override;
+ const struct dmi_system_id *system_id;
+
+ system_id = dmi_first_match(i2c_hid_dmi_desc_override_table);
+ if (!system_id)
+ return NULL;
+
+ override = system_id->driver_data;
+ if (strcmp(override->i2c_name, i2c_name))
+ return NULL;
+
+ return override->i2c_hid_desc;
+}
+
+char *i2c_hid_get_dmi_hid_report_desc_override(uint8_t *i2c_name,
+ unsigned int *size)
+{
+ struct i2c_hid_desc_override *override;
+ const struct dmi_system_id *system_id;
+
+ system_id = dmi_first_match(i2c_hid_dmi_desc_override_table);
+ if (!system_id)
+ return NULL;
+
+ override = system_id->driver_data;
+ if (strcmp(override->i2c_name, i2c_name))
+ return NULL;
+
+ *size = override->hid_report_desc_size;
+ return override->hid_report_desc;
+}
diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c
deleted file mode 100644
index 136a34dc31b8..000000000000
--- a/drivers/hid/i2c-hid/i2c-hid.c
+++ /dev/null
@@ -1,1279 +0,0 @@
-/*
- * HID over I2C protocol implementation
- *
- * Copyright (c) 2012 Benjamin Tissoires <benjamin.tissoires@gmail.com>
- * Copyright (c) 2012 Ecole Nationale de l'Aviation Civile, France
- * Copyright (c) 2012 Red Hat, Inc
- *
- * This code is partly based on "USB HID support for Linux":
- *
- * Copyright (c) 1999 Andreas Gal
- * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
- * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
- * Copyright (c) 2007-2008 Oliver Neukum
- * Copyright (c) 2006-2010 Jiri Kosina
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of this archive for
- * more details.
- */
-
-#include <linux/module.h>
-#include <linux/i2c.h>
-#include <linux/interrupt.h>
-#include <linux/input.h>
-#include <linux/irq.h>
-#include <linux/delay.h>
-#include <linux/slab.h>
-#include <linux/pm.h>
-#include <linux/pm_runtime.h>
-#include <linux/device.h>
-#include <linux/wait.h>
-#include <linux/err.h>
-#include <linux/string.h>
-#include <linux/list.h>
-#include <linux/jiffies.h>
-#include <linux/kernel.h>
-#include <linux/hid.h>
-#include <linux/mutex.h>
-#include <linux/acpi.h>
-#include <linux/of.h>
-#include <linux/regulator/consumer.h>
-
-#include <linux/platform_data/i2c-hid.h>
-
-#include "../hid-ids.h"
-
-/* quirks to control the device */
-#define I2C_HID_QUIRK_SET_PWR_WAKEUP_DEV BIT(0)
-
-/* flags */
-#define I2C_HID_STARTED 0
-#define I2C_HID_RESET_PENDING 1
-#define I2C_HID_READ_PENDING 2
-
-#define I2C_HID_PWR_ON 0x00
-#define I2C_HID_PWR_SLEEP 0x01
-
-/* debug option */
-static bool debug;
-module_param(debug, bool, 0444);
-MODULE_PARM_DESC(debug, "print a lot of debug information");
-
-#define i2c_hid_dbg(ihid, fmt, arg...) \
-do { \
- if (debug) \
- dev_printk(KERN_DEBUG, &(ihid)->client->dev, fmt, ##arg); \
-} while (0)
-
-struct i2c_hid_desc {
- __le16 wHIDDescLength;
- __le16 bcdVersion;
- __le16 wReportDescLength;
- __le16 wReportDescRegister;
- __le16 wInputRegister;
- __le16 wMaxInputLength;
- __le16 wOutputRegister;
- __le16 wMaxOutputLength;
- __le16 wCommandRegister;
- __le16 wDataRegister;
- __le16 wVendorID;
- __le16 wProductID;
- __le16 wVersionID;
- __le32 reserved;
-} __packed;
-
-struct i2c_hid_cmd {
- unsigned int registerIndex;
- __u8 opcode;
- unsigned int length;
- bool wait;
-};
-
-union command {
- u8 data[0];
- struct cmd {
- __le16 reg;
- __u8 reportTypeID;
- __u8 opcode;
- } __packed c;
-};
-
-#define I2C_HID_CMD(opcode_) \
- .opcode = opcode_, .length = 4, \
- .registerIndex = offsetof(struct i2c_hid_desc, wCommandRegister)
-
-/* fetch HID descriptor */
-static const struct i2c_hid_cmd hid_descr_cmd = { .length = 2 };
-/* fetch report descriptors */
-static const struct i2c_hid_cmd hid_report_descr_cmd = {
- .registerIndex = offsetof(struct i2c_hid_desc,
- wReportDescRegister),
- .opcode = 0x00,
- .length = 2 };
-/* commands */
-static const struct i2c_hid_cmd hid_reset_cmd = { I2C_HID_CMD(0x01),
- .wait = true };
-static const struct i2c_hid_cmd hid_get_report_cmd = { I2C_HID_CMD(0x02) };
-static const struct i2c_hid_cmd hid_set_report_cmd = { I2C_HID_CMD(0x03) };
-static const struct i2c_hid_cmd hid_set_power_cmd = { I2C_HID_CMD(0x08) };
-static const struct i2c_hid_cmd hid_no_cmd = { .length = 0 };
-
-/*
- * These definitions are not used here, but are defined by the spec.
- * Keeping them here for documentation purposes.
- *
- * static const struct i2c_hid_cmd hid_get_idle_cmd = { I2C_HID_CMD(0x04) };
- * static const struct i2c_hid_cmd hid_set_idle_cmd = { I2C_HID_CMD(0x05) };
- * static const struct i2c_hid_cmd hid_get_protocol_cmd = { I2C_HID_CMD(0x06) };
- * static const struct i2c_hid_cmd hid_set_protocol_cmd = { I2C_HID_CMD(0x07) };
- */
-
-static DEFINE_MUTEX(i2c_hid_open_mut);
-
-/* The main device structure */
-struct i2c_hid {
- struct i2c_client *client; /* i2c client */
- struct hid_device *hid; /* pointer to corresponding HID dev */
- union {
- __u8 hdesc_buffer[sizeof(struct i2c_hid_desc)];
- struct i2c_hid_desc hdesc; /* the HID Descriptor */
- };
- __le16 wHIDDescRegister; /* location of the i2c
- * register of the HID
- * descriptor. */
- unsigned int bufsize; /* i2c buffer size */
- u8 *inbuf; /* Input buffer */
- u8 *rawbuf; /* Raw Input buffer */
- u8 *cmdbuf; /* Command buffer */
- u8 *argsbuf; /* Command arguments buffer */
-
- unsigned long flags; /* device flags */
- unsigned long quirks; /* Various quirks */
-
- wait_queue_head_t wait; /* For waiting the interrupt */
-
- struct i2c_hid_platform_data pdata;
-
- bool irq_wake_enabled;
- struct mutex reset_lock;
-};
-
-static const struct i2c_hid_quirks {
- __u16 idVendor;
- __u16 idProduct;
- __u32 quirks;
-} i2c_hid_quirks[] = {
- { USB_VENDOR_ID_WEIDA, USB_DEVICE_ID_WEIDA_8752,
- I2C_HID_QUIRK_SET_PWR_WAKEUP_DEV },
- { USB_VENDOR_ID_WEIDA, USB_DEVICE_ID_WEIDA_8755,
- I2C_HID_QUIRK_SET_PWR_WAKEUP_DEV },
- { 0, 0 }
-};
-
-/*
- * i2c_hid_lookup_quirk: return any quirks associated with a I2C HID device
- * @idVendor: the 16-bit vendor ID
- * @idProduct: the 16-bit product ID
- *
- * Returns: a u32 quirks value.
- */
-static u32 i2c_hid_lookup_quirk(const u16 idVendor, const u16 idProduct)
-{
- u32 quirks = 0;
- int n;
-
- for (n = 0; i2c_hid_quirks[n].idVendor; n++)
- if (i2c_hid_quirks[n].idVendor == idVendor &&
- (i2c_hid_quirks[n].idProduct == (__u16)HID_ANY_ID ||
- i2c_hid_quirks[n].idProduct == idProduct))
- quirks = i2c_hid_quirks[n].quirks;
-
- return quirks;
-}
-
-static int __i2c_hid_command(struct i2c_client *client,
- const struct i2c_hid_cmd *command, u8 reportID,
- u8 reportType, u8 *args, int args_len,
- unsigned char *buf_recv, int data_len)
-{
- struct i2c_hid *ihid = i2c_get_clientdata(client);
- union command *cmd = (union command *)ihid->cmdbuf;
- int ret;
- struct i2c_msg msg[2];
- int msg_num = 1;
-
- int length = command->length;
- bool wait = command->wait;
- unsigned int registerIndex = command->registerIndex;
-
- /* special case for hid_descr_cmd */
- if (command == &hid_descr_cmd) {
- cmd->c.reg = ihid->wHIDDescRegister;
- } else {
- cmd->data[0] = ihid->hdesc_buffer[registerIndex];
- cmd->data[1] = ihid->hdesc_buffer[registerIndex + 1];
- }
-
- if (length > 2) {
- cmd->c.opcode = command->opcode;
- cmd->c.reportTypeID = reportID | reportType << 4;
- }
-
- memcpy(cmd->data + length, args, args_len);
- length += args_len;
-
- i2c_hid_dbg(ihid, "%s: cmd=%*ph\n", __func__, length, cmd->data);
-
- msg[0].addr = client->addr;
- msg[0].flags = client->flags & I2C_M_TEN;
- msg[0].len = length;
- msg[0].buf = cmd->data;
- if (data_len > 0) {
- msg[1].addr = client->addr;
- msg[1].flags = client->flags & I2C_M_TEN;
- msg[1].flags |= I2C_M_RD;
- msg[1].len = data_len;
- msg[1].buf = buf_recv;
- msg_num = 2;
- set_bit(I2C_HID_READ_PENDING, &ihid->flags);
- }
-
- if (wait)
- set_bit(I2C_HID_RESET_PENDING, &ihid->flags);
-
- ret = i2c_transfer(client->adapter, msg, msg_num);
-
- if (data_len > 0)
- clear_bit(I2C_HID_READ_PENDING, &ihid->flags);
-
- if (ret != msg_num)
- return ret < 0 ? ret : -EIO;
-
- ret = 0;
-
- if (wait) {
- i2c_hid_dbg(ihid, "%s: waiting...\n", __func__);
- if (!wait_event_timeout(ihid->wait,
- !test_bit(I2C_HID_RESET_PENDING, &ihid->flags),
- msecs_to_jiffies(5000)))
- ret = -ENODATA;
- i2c_hid_dbg(ihid, "%s: finished.\n", __func__);
- }
-
- return ret;
-}
-
-static int i2c_hid_command(struct i2c_client *client,
- const struct i2c_hid_cmd *command,
- unsigned char *buf_recv, int data_len)
-{
- return __i2c_hid_command(client, command, 0, 0, NULL, 0,
- buf_recv, data_len);
-}
-
-static int i2c_hid_get_report(struct i2c_client *client, u8 reportType,
- u8 reportID, unsigned char *buf_recv, int data_len)
-{
- struct i2c_hid *ihid = i2c_get_clientdata(client);
- u8 args[3];
- int ret;
- int args_len = 0;
- u16 readRegister = le16_to_cpu(ihid->hdesc.wDataRegister);
-
- i2c_hid_dbg(ihid, "%s\n", __func__);
-
- if (reportID >= 0x0F) {
- args[args_len++] = reportID;
- reportID = 0x0F;
- }
-
- args[args_len++] = readRegister & 0xFF;
- args[args_len++] = readRegister >> 8;
-
- ret = __i2c_hid_command(client, &hid_get_report_cmd, reportID,
- reportType, args, args_len, buf_recv, data_len);
- if (ret) {
- dev_err(&client->dev,
- "failed to retrieve report from device.\n");
- return ret;
- }
-
- return 0;
-}
-
-/**
- * i2c_hid_set_or_send_report: forward an incoming report to the device
- * @client: the i2c_client of the device
- * @reportType: 0x03 for HID_FEATURE_REPORT ; 0x02 for HID_OUTPUT_REPORT
- * @reportID: the report ID
- * @buf: the actual data to transfer, without the report ID
- * @len: size of buf
- * @use_data: true: use SET_REPORT HID command, false: send plain OUTPUT report
- */
-static int i2c_hid_set_or_send_report(struct i2c_client *client, u8 reportType,
- u8 reportID, unsigned char *buf, size_t data_len, bool use_data)
-{
- struct i2c_hid *ihid = i2c_get_clientdata(client);
- u8 *args = ihid->argsbuf;
- const struct i2c_hid_cmd *hidcmd;
- int ret;
- u16 dataRegister = le16_to_cpu(ihid->hdesc.wDataRegister);
- u16 outputRegister = le16_to_cpu(ihid->hdesc.wOutputRegister);
- u16 maxOutputLength = le16_to_cpu(ihid->hdesc.wMaxOutputLength);
- u16 size;
- int args_len;
- int index = 0;
-
- i2c_hid_dbg(ihid, "%s\n", __func__);
-
- if (data_len > ihid->bufsize)
- return -EINVAL;
-
- size = 2 /* size */ +
- (reportID ? 1 : 0) /* reportID */ +
- data_len /* buf */;
- args_len = (reportID >= 0x0F ? 1 : 0) /* optional third byte */ +
- 2 /* dataRegister */ +
- size /* args */;
-
- if (!use_data && maxOutputLength == 0)
- return -ENOSYS;
-
- if (reportID >= 0x0F) {
- args[index++] = reportID;
- reportID = 0x0F;
- }
-
- /*
- * use the data register for feature reports or if the device does not
- * support the output register
- */
- if (use_data) {
- args[index++] = dataRegister & 0xFF;
- args[index++] = dataRegister >> 8;
- hidcmd = &hid_set_report_cmd;
- } else {
- args[index++] = outputRegister & 0xFF;
- args[index++] = outputRegister >> 8;
- hidcmd = &hid_no_cmd;
- }
-
- args[index++] = size & 0xFF;
- args[index++] = size >> 8;
-
- if (reportID)
- args[index++] = reportID;
-
- memcpy(&args[index], buf, data_len);
-
- ret = __i2c_hid_command(client, hidcmd, reportID,
- reportType, args, args_len, NULL, 0);
- if (ret) {
- dev_err(&client->dev, "failed to set a report to device.\n");
- return ret;
- }
-
- return data_len;
-}
-
-static int i2c_hid_set_power(struct i2c_client *client, int power_state)
-{
- struct i2c_hid *ihid = i2c_get_clientdata(client);
- int ret;
-
- i2c_hid_dbg(ihid, "%s\n", __func__);
-
- /*
- * Some devices require to send a command to wakeup before power on.
- * The call will get a return value (EREMOTEIO) but device will be
- * triggered and activated. After that, it goes like a normal device.
- */
- if (power_state == I2C_HID_PWR_ON &&
- ihid->quirks & I2C_HID_QUIRK_SET_PWR_WAKEUP_DEV) {
- ret = i2c_hid_command(client, &hid_set_power_cmd, NULL, 0);
-
- /* Device was already activated */
- if (!ret)
- goto set_pwr_exit;
- }
-
- ret = __i2c_hid_command(client, &hid_set_power_cmd, power_state,
- 0, NULL, 0, NULL, 0);
-
- if (ret)
- dev_err(&client->dev, "failed to change power setting.\n");
-
-set_pwr_exit:
- return ret;
-}
-
-static int i2c_hid_hwreset(struct i2c_client *client)
-{
- struct i2c_hid *ihid = i2c_get_clientdata(client);
- int ret;
-
- i2c_hid_dbg(ihid, "%s\n", __func__);
-
- /*
- * This prevents sending feature reports while the device is
- * being reset. Otherwise we may lose the reset complete
- * interrupt.
- */
- mutex_lock(&ihid->reset_lock);
-
- ret = i2c_hid_set_power(client, I2C_HID_PWR_ON);
- if (ret)
- goto out_unlock;
-
- /*
- * The HID over I2C specification states that if a DEVICE needs time
- * after the PWR_ON request, it should utilise CLOCK stretching.
- * However, it has been observered that the Windows driver provides a
- * 1ms sleep between the PWR_ON and RESET requests and that some devices
- * rely on this.
- */
- usleep_range(1000, 5000);
-
- i2c_hid_dbg(ihid, "resetting...\n");
-
- ret = i2c_hid_command(client, &hid_reset_cmd, NULL, 0);
- if (ret) {
- dev_err(&client->dev, "failed to reset device.\n");
- i2c_hid_set_power(client, I2C_HID_PWR_SLEEP);
- }
-
-out_unlock:
- mutex_unlock(&ihid->reset_lock);
- return ret;
-}
-
-static void i2c_hid_get_input(struct i2c_hid *ihid)
-{
- int ret;
- u32 ret_size;
- int size = le16_to_cpu(ihid->hdesc.wMaxInputLength);
-
- if (size > ihid->bufsize)
- size = ihid->bufsize;
-
- ret = i2c_master_recv(ihid->client, ihid->inbuf, size);
- if (ret != size) {
- if (ret < 0)
- return;
-
- dev_err(&ihid->client->dev, "%s: got %d data instead of %d\n",
- __func__, ret, size);
- return;
- }
-
- ret_size = ihid->inbuf[0] | ihid->inbuf[1] << 8;
-
- if (!ret_size) {
- /* host or device initiated RESET completed */
- if (test_and_clear_bit(I2C_HID_RESET_PENDING, &ihid->flags))
- wake_up(&ihid->wait);
- return;
- }
-
- if ((ret_size > size) || (ret_size < 2)) {
- dev_err(&ihid->client->dev, "%s: incomplete report (%d/%d)\n",
- __func__, size, ret_size);
- return;
- }
-
- i2c_hid_dbg(ihid, "input: %*ph\n", ret_size, ihid->inbuf);
-
- if (test_bit(I2C_HID_STARTED, &ihid->flags))
- hid_input_report(ihid->hid, HID_INPUT_REPORT, ihid->inbuf + 2,
- ret_size - 2, 1);
-
- return;
-}
-
-static irqreturn_t i2c_hid_irq(int irq, void *dev_id)
-{
- struct i2c_hid *ihid = dev_id;
-
- if (test_bit(I2C_HID_READ_PENDING, &ihid->flags))
- return IRQ_HANDLED;
-
- i2c_hid_get_input(ihid);
-
- return IRQ_HANDLED;
-}
-
-static int i2c_hid_get_report_length(struct hid_report *report)
-{
- return ((report->size - 1) >> 3) + 1 +
- report->device->report_enum[report->type].numbered + 2;
-}
-
-/*
- * Traverse the supplied list of reports and find the longest
- */
-static void i2c_hid_find_max_report(struct hid_device *hid, unsigned int type,
- unsigned int *max)
-{
- struct hid_report *report;
- unsigned int size;
-
- /* We should not rely on wMaxInputLength, as some devices may set it to
- * a wrong length. */
- list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
- size = i2c_hid_get_report_length(report);
- if (*max < size)
- *max = size;
- }
-}
-
-static void i2c_hid_free_buffers(struct i2c_hid *ihid)
-{
- kfree(ihid->inbuf);
- kfree(ihid->rawbuf);
- kfree(ihid->argsbuf);
- kfree(ihid->cmdbuf);
- ihid->inbuf = NULL;
- ihid->rawbuf = NULL;
- ihid->cmdbuf = NULL;
- ihid->argsbuf = NULL;
- ihid->bufsize = 0;
-}
-
-static int i2c_hid_alloc_buffers(struct i2c_hid *ihid, size_t report_size)
-{
- /* the worst case is computed from the set_report command with a
- * reportID > 15 and the maximum report length */
- int args_len = sizeof(__u8) + /* ReportID */
- sizeof(__u8) + /* optional ReportID byte */
- sizeof(__u16) + /* data register */
- sizeof(__u16) + /* size of the report */
- report_size; /* report */
-
- ihid->inbuf = kzalloc(report_size, GFP_KERNEL);
- ihid->rawbuf = kzalloc(report_size, GFP_KERNEL);
- ihid->argsbuf = kzalloc(args_len, GFP_KERNEL);
- ihid->cmdbuf = kzalloc(sizeof(union command) + args_len, GFP_KERNEL);
-
- if (!ihid->inbuf || !ihid->rawbuf || !ihid->argsbuf || !ihid->cmdbuf) {
- i2c_hid_free_buffers(ihid);
- return -ENOMEM;
- }
-
- ihid->bufsize = report_size;
-
- return 0;
-}
-
-static int i2c_hid_get_raw_report(struct hid_device *hid,
- unsigned char report_number, __u8 *buf, size_t count,
- unsigned char report_type)
-{
- struct i2c_client *client = hid->driver_data;
- struct i2c_hid *ihid = i2c_get_clientdata(client);
- size_t ret_count, ask_count;
- int ret;
-
- if (report_type == HID_OUTPUT_REPORT)
- return -EINVAL;
-
- /* +2 bytes to include the size of the reply in the query buffer */
- ask_count = min(count + 2, (size_t)ihid->bufsize);
-
- ret = i2c_hid_get_report(client,
- report_type == HID_FEATURE_REPORT ? 0x03 : 0x01,
- report_number, ihid->rawbuf, ask_count);
-
- if (ret < 0)
- return ret;
-
- ret_count = ihid->rawbuf[0] | (ihid->rawbuf[1] << 8);
-
- if (ret_count <= 2)
- return 0;
-
- ret_count = min(ret_count, ask_count);
-
- /* The query buffer contains the size, dropping it in the reply */
- count = min(count, ret_count - 2);
- memcpy(buf, ihid->rawbuf + 2, count);
-
- return count;
-}
-
-static int i2c_hid_output_raw_report(struct hid_device *hid, __u8 *buf,
- size_t count, unsigned char report_type, bool use_data)
-{
- struct i2c_client *client = hid->driver_data;
- struct i2c_hid *ihid = i2c_get_clientdata(client);
- int report_id = buf[0];
- int ret;
-
- if (report_type == HID_INPUT_REPORT)
- return -EINVAL;
-
- mutex_lock(&ihid->reset_lock);
-
- if (report_id) {
- buf++;
- count--;
- }
-
- ret = i2c_hid_set_or_send_report(client,
- report_type == HID_FEATURE_REPORT ? 0x03 : 0x02,
- report_id, buf, count, use_data);
-
- if (report_id && ret >= 0)
- ret++; /* add report_id to the number of transfered bytes */
-
- mutex_unlock(&ihid->reset_lock);
-
- return ret;
-}
-
-static int i2c_hid_output_report(struct hid_device *hid, __u8 *buf,
- size_t count)
-{
- return i2c_hid_output_raw_report(hid, buf, count, HID_OUTPUT_REPORT,
- false);
-}
-
-static int i2c_hid_raw_request(struct hid_device *hid, unsigned char reportnum,
- __u8 *buf, size_t len, unsigned char rtype,
- int reqtype)
-{
- switch (reqtype) {
- case HID_REQ_GET_REPORT:
- return i2c_hid_get_raw_report(hid, reportnum, buf, len, rtype);
- case HID_REQ_SET_REPORT:
- if (buf[0] != reportnum)
- return -EINVAL;
- return i2c_hid_output_raw_report(hid, buf, len, rtype, true);
- default:
- return -EIO;
- }
-}
-
-static int i2c_hid_parse(struct hid_device *hid)
-{
- struct i2c_client *client = hid->driver_data;
- struct i2c_hid *ihid = i2c_get_clientdata(client);
- struct i2c_hid_desc *hdesc = &ihid->hdesc;
- unsigned int rsize;
- char *rdesc;
- int ret;
- int tries = 3;
-
- i2c_hid_dbg(ihid, "entering %s\n", __func__);
-
- rsize = le16_to_cpu(hdesc->wReportDescLength);
- if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
- dbg_hid("weird size of report descriptor (%u)\n", rsize);
- return -EINVAL;
- }
-
- do {
- ret = i2c_hid_hwreset(client);
- if (ret)
- msleep(1000);
- } while (tries-- > 0 && ret);
-
- if (ret)
- return ret;
-
- rdesc = kzalloc(rsize, GFP_KERNEL);
-
- if (!rdesc) {
- dbg_hid("couldn't allocate rdesc memory\n");
- return -ENOMEM;
- }
-
- i2c_hid_dbg(ihid, "asking HID report descriptor\n");
-
- ret = i2c_hid_command(client, &hid_report_descr_cmd, rdesc, rsize);
- if (ret) {
- hid_err(hid, "reading report descriptor failed\n");
- kfree(rdesc);
- return -EIO;
- }
-
- i2c_hid_dbg(ihid, "Report Descriptor: %*ph\n", rsize, rdesc);
-
- ret = hid_parse_report(hid, rdesc, rsize);
- kfree(rdesc);
- if (ret) {
- dbg_hid("parsing report descriptor failed\n");
- return ret;
- }
-
- return 0;
-}
-
-static int i2c_hid_start(struct hid_device *hid)
-{
- struct i2c_client *client = hid->driver_data;
- struct i2c_hid *ihid = i2c_get_clientdata(client);
- int ret;
- unsigned int bufsize = HID_MIN_BUFFER_SIZE;
-
- i2c_hid_find_max_report(hid, HID_INPUT_REPORT, &bufsize);
- i2c_hid_find_max_report(hid, HID_OUTPUT_REPORT, &bufsize);
- i2c_hid_find_max_report(hid, HID_FEATURE_REPORT, &bufsize);
-
- if (bufsize > ihid->bufsize) {
- disable_irq(client->irq);
- i2c_hid_free_buffers(ihid);
-
- ret = i2c_hid_alloc_buffers(ihid, bufsize);
- enable_irq(client->irq);
-
- if (ret)
- return ret;
- }
-
- return 0;
-}
-
-static void i2c_hid_stop(struct hid_device *hid)
-{
- hid->claimed = 0;
-}
-
-static int i2c_hid_open(struct hid_device *hid)
-{
- struct i2c_client *client = hid->driver_data;
- struct i2c_hid *ihid = i2c_get_clientdata(client);
- int ret = 0;
-
- ret = pm_runtime_get_sync(&client->dev);
- if (ret < 0)
- return ret;
-
- set_bit(I2C_HID_STARTED, &ihid->flags);
- return 0;
-}
-
-static void i2c_hid_close(struct hid_device *hid)
-{
- struct i2c_client *client = hid->driver_data;
- struct i2c_hid *ihid = i2c_get_clientdata(client);
-
- clear_bit(I2C_HID_STARTED, &ihid->flags);
-
- /* Save some power */
- pm_runtime_put(&client->dev);
-}
-
-static int i2c_hid_power(struct hid_device *hid, int lvl)
-{
- struct i2c_client *client = hid->driver_data;
- struct i2c_hid *ihid = i2c_get_clientdata(client);
-
- i2c_hid_dbg(ihid, "%s lvl:%d\n", __func__, lvl);
-
- switch (lvl) {
- case PM_HINT_FULLON:
- pm_runtime_get_sync(&client->dev);
- break;
- case PM_HINT_NORMAL:
- pm_runtime_put(&client->dev);
- break;
- }
- return 0;
-}
-
-struct hid_ll_driver i2c_hid_ll_driver = {
- .parse = i2c_hid_parse,
- .start = i2c_hid_start,
- .stop = i2c_hid_stop,
- .open = i2c_hid_open,
- .close = i2c_hid_close,
- .power = i2c_hid_power,
- .output_report = i2c_hid_output_report,
- .raw_request = i2c_hid_raw_request,
-};
-EXPORT_SYMBOL_GPL(i2c_hid_ll_driver);
-
-static int i2c_hid_init_irq(struct i2c_client *client)
-{
- struct i2c_hid *ihid = i2c_get_clientdata(client);
- unsigned long irqflags = 0;
- int ret;
-
- dev_dbg(&client->dev, "Requesting IRQ: %d\n", client->irq);
-
- if (!irq_get_trigger_type(client->irq))
- irqflags = IRQF_TRIGGER_LOW;
-
- ret = request_threaded_irq(client->irq, NULL, i2c_hid_irq,
- irqflags | IRQF_ONESHOT, client->name, ihid);
- if (ret < 0) {
- dev_warn(&client->dev,
- "Could not register for %s interrupt, irq = %d,"
- " ret = %d\n",
- client->name, client->irq, ret);
-
- return ret;
- }
-
- return 0;
-}
-
-static int i2c_hid_fetch_hid_descriptor(struct i2c_hid *ihid)
-{
- struct i2c_client *client = ihid->client;
- struct i2c_hid_desc *hdesc = &ihid->hdesc;
- unsigned int dsize;
- int ret;
-
- /* i2c hid fetch using a fixed descriptor size (30 bytes) */
- i2c_hid_dbg(ihid, "Fetching the HID descriptor\n");
- ret = i2c_hid_command(client, &hid_descr_cmd, ihid->hdesc_buffer,
- sizeof(struct i2c_hid_desc));
- if (ret) {
- dev_err(&client->dev, "hid_descr_cmd failed\n");
- return -ENODEV;
- }
-
- /* Validate the length of HID descriptor, the 4 first bytes:
- * bytes 0-1 -> length
- * bytes 2-3 -> bcdVersion (has to be 1.00) */
- /* check bcdVersion == 1.0 */
- if (le16_to_cpu(hdesc->bcdVersion) != 0x0100) {
- dev_err(&client->dev,
- "unexpected HID descriptor bcdVersion (0x%04hx)\n",
- le16_to_cpu(hdesc->bcdVersion));
- return -ENODEV;
- }
-
- /* Descriptor length should be 30 bytes as per the specification */
- dsize = le16_to_cpu(hdesc->wHIDDescLength);
- if (dsize != sizeof(struct i2c_hid_desc)) {
- dev_err(&client->dev, "weird size of HID descriptor (%u)\n",
- dsize);
- return -ENODEV;
- }
- i2c_hid_dbg(ihid, "HID Descriptor: %*ph\n", dsize, ihid->hdesc_buffer);
- return 0;
-}
-
-#ifdef CONFIG_ACPI
-static int i2c_hid_acpi_pdata(struct i2c_client *client,
- struct i2c_hid_platform_data *pdata)
-{
- static guid_t i2c_hid_guid =
- GUID_INIT(0x3CDFF6F7, 0x4267, 0x4555,
- 0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE);
- union acpi_object *obj;
- struct acpi_device *adev;
- acpi_handle handle;
-
- handle = ACPI_HANDLE(&client->dev);
- if (!handle || acpi_bus_get_device(handle, &adev))
- return -ENODEV;
-
- obj = acpi_evaluate_dsm_typed(handle, &i2c_hid_guid, 1, 1, NULL,
- ACPI_TYPE_INTEGER);
- if (!obj) {
- dev_err(&client->dev, "device _DSM execution failed\n");
- return -ENODEV;
- }
-
- pdata->hid_descriptor_address = obj->integer.value;
- ACPI_FREE(obj);
-
- return 0;
-}
-
-static void i2c_hid_acpi_fix_up_power(struct device *dev)
-{
- acpi_handle handle = ACPI_HANDLE(dev);
- struct acpi_device *adev;
-
- if (handle && acpi_bus_get_device(handle, &adev) == 0)
- acpi_device_fix_up_power(adev);
-}
-
-static const struct acpi_device_id i2c_hid_acpi_match[] = {
- {"ACPI0C50", 0 },
- {"PNP0C50", 0 },
- { },
-};
-MODULE_DEVICE_TABLE(acpi, i2c_hid_acpi_match);
-#else
-static inline int i2c_hid_acpi_pdata(struct i2c_client *client,
- struct i2c_hid_platform_data *pdata)
-{
- return -ENODEV;
-}
-
-static inline void i2c_hid_acpi_fix_up_power(struct device *dev) {}
-#endif
-
-#ifdef CONFIG_OF
-static int i2c_hid_of_probe(struct i2c_client *client,
- struct i2c_hid_platform_data *pdata)
-{
- struct device *dev = &client->dev;
- u32 val;
- int ret;
-
- ret = of_property_read_u32(dev->of_node, "hid-descr-addr", &val);
- if (ret) {
- dev_err(&client->dev, "HID register address not provided\n");
- return -ENODEV;
- }
- if (val >> 16) {
- dev_err(&client->dev, "Bad HID register address: 0x%08x\n",
- val);
- return -EINVAL;
- }
- pdata->hid_descriptor_address = val;
-
- ret = of_property_read_u32(dev->of_node, "post-power-on-delay-ms",
- &val);
- if (!ret)
- pdata->post_power_delay_ms = val;
-
- return 0;
-}
-
-static const struct of_device_id i2c_hid_of_match[] = {
- { .compatible = "hid-over-i2c" },
- {},
-};
-MODULE_DEVICE_TABLE(of, i2c_hid_of_match);
-#else
-static inline int i2c_hid_of_probe(struct i2c_client *client,
- struct i2c_hid_platform_data *pdata)
-{
- return -ENODEV;
-}
-#endif
-
-static int i2c_hid_probe(struct i2c_client *client,
- const struct i2c_device_id *dev_id)
-{
- int ret;
- struct i2c_hid *ihid;
- struct hid_device *hid;
- __u16 hidRegister;
- struct i2c_hid_platform_data *platform_data = client->dev.platform_data;
-
- dbg_hid("HID probe called for i2c 0x%02x\n", client->addr);
-
- if (!client->irq) {
- dev_err(&client->dev,
- "HID over i2c has not been provided an Int IRQ\n");
- return -EINVAL;
- }
-
- if (client->irq < 0) {
- if (client->irq != -EPROBE_DEFER)
- dev_err(&client->dev,
- "HID over i2c doesn't have a valid IRQ\n");
- return client->irq;
- }
-
- ihid = kzalloc(sizeof(struct i2c_hid), GFP_KERNEL);
- if (!ihid)
- return -ENOMEM;
-
- if (client->dev.of_node) {
- ret = i2c_hid_of_probe(client, &ihid->pdata);
- if (ret)
- goto err;
- } else if (!platform_data) {
- ret = i2c_hid_acpi_pdata(client, &ihid->pdata);
- if (ret) {
- dev_err(&client->dev,
- "HID register address not provided\n");
- goto err;
- }
- } else {
- ihid->pdata = *platform_data;
- }
-
- ihid->pdata.supply = devm_regulator_get(&client->dev, "vdd");
- if (IS_ERR(ihid->pdata.supply)) {
- ret = PTR_ERR(ihid->pdata.supply);
- if (ret != -EPROBE_DEFER)
- dev_err(&client->dev, "Failed to get regulator: %d\n",
- ret);
- goto err;
- }
-
- ret = regulator_enable(ihid->pdata.supply);
- if (ret < 0) {
- dev_err(&client->dev, "Failed to enable regulator: %d\n",
- ret);
- goto err;
- }
- if (ihid->pdata.post_power_delay_ms)
- msleep(ihid->pdata.post_power_delay_ms);
-
- i2c_set_clientdata(client, ihid);
-
- ihid->client = client;
-
- hidRegister = ihid->pdata.hid_descriptor_address;
- ihid->wHIDDescRegister = cpu_to_le16(hidRegister);
-
- init_waitqueue_head(&ihid->wait);
- mutex_init(&ihid->reset_lock);
-
- /* we need to allocate the command buffer without knowing the maximum
- * size of the reports. Let's use HID_MIN_BUFFER_SIZE, then we do the
- * real computation later. */
- ret = i2c_hid_alloc_buffers(ihid, HID_MIN_BUFFER_SIZE);
- if (ret < 0)
- goto err_regulator;
-
- i2c_hid_acpi_fix_up_power(&client->dev);
-
- pm_runtime_get_noresume(&client->dev);
- pm_runtime_set_active(&client->dev);
- pm_runtime_enable(&client->dev);
- device_enable_async_suspend(&client->dev);
-
- /* Make sure there is something at this address */
- ret = i2c_smbus_read_byte(client);
- if (ret < 0) {
- dev_dbg(&client->dev, "nothing at this address: %d\n", ret);
- ret = -ENXIO;
- goto err_pm;
- }
-
- ret = i2c_hid_fetch_hid_descriptor(ihid);
- if (ret < 0)
- goto err_pm;
-
- ret = i2c_hid_init_irq(client);
- if (ret < 0)
- goto err_pm;
-
- hid = hid_allocate_device();
- if (IS_ERR(hid)) {
- ret = PTR_ERR(hid);
- goto err_irq;
- }
-
- ihid->hid = hid;
-
- hid->driver_data = client;
- hid->ll_driver = &i2c_hid_ll_driver;
- hid->dev.parent = &client->dev;
- hid->bus = BUS_I2C;
- hid->version = le16_to_cpu(ihid->hdesc.bcdVersion);
- hid->vendor = le16_to_cpu(ihid->hdesc.wVendorID);
- hid->product = le16_to_cpu(ihid->hdesc.wProductID);
-
- snprintf(hid->name, sizeof(hid->name), "%s %04hX:%04hX",
- client->name, hid->vendor, hid->product);
- strlcpy(hid->phys, dev_name(&client->dev), sizeof(hid->phys));
-
- ihid->quirks = i2c_hid_lookup_quirk(hid->vendor, hid->product);
-
- ret = hid_add_device(hid);
- if (ret) {
- if (ret != -ENODEV)
- hid_err(client, "can't add hid device: %d\n", ret);
- goto err_mem_free;
- }
-
- pm_runtime_put(&client->dev);
- return 0;
-
-err_mem_free:
- hid_destroy_device(hid);
-
-err_irq:
- free_irq(client->irq, ihid);
-
-err_pm:
- pm_runtime_put_noidle(&client->dev);
- pm_runtime_disable(&client->dev);
-
-err_regulator:
- regulator_disable(ihid->pdata.supply);
-
-err:
- i2c_hid_free_buffers(ihid);
- kfree(ihid);
- return ret;
-}
-
-static int i2c_hid_remove(struct i2c_client *client)
-{
- struct i2c_hid *ihid = i2c_get_clientdata(client);
- struct hid_device *hid;
-
- pm_runtime_get_sync(&client->dev);
- pm_runtime_disable(&client->dev);
- pm_runtime_set_suspended(&client->dev);
- pm_runtime_put_noidle(&client->dev);
-
- hid = ihid->hid;
- hid_destroy_device(hid);
-
- free_irq(client->irq, ihid);
-
- if (ihid->bufsize)
- i2c_hid_free_buffers(ihid);
-
- regulator_disable(ihid->pdata.supply);
-
- kfree(ihid);
-
- return 0;
-}
-
-static void i2c_hid_shutdown(struct i2c_client *client)
-{
- struct i2c_hid *ihid = i2c_get_clientdata(client);
-
- i2c_hid_set_power(client, I2C_HID_PWR_SLEEP);
- free_irq(client->irq, ihid);
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int i2c_hid_suspend(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct i2c_hid *ihid = i2c_get_clientdata(client);
- struct hid_device *hid = ihid->hid;
- int ret;
- int wake_status;
-
- if (hid->driver && hid->driver->suspend) {
- /*
- * Wake up the device so that IO issues in
- * HID driver's suspend code can succeed.
- */
- ret = pm_runtime_resume(dev);
- if (ret < 0)
- return ret;
-
- ret = hid->driver->suspend(hid, PMSG_SUSPEND);
- if (ret < 0)
- return ret;
- }
-
- if (!pm_runtime_suspended(dev)) {
- /* Save some power */
- i2c_hid_set_power(client, I2C_HID_PWR_SLEEP);
-
- disable_irq(client->irq);
- }
-
- if (device_may_wakeup(&client->dev)) {
- wake_status = enable_irq_wake(client->irq);
- if (!wake_status)
- ihid->irq_wake_enabled = true;
- else
- hid_warn(hid, "Failed to enable irq wake: %d\n",
- wake_status);
- } else {
- ret = regulator_disable(ihid->pdata.supply);
- if (ret < 0)
- hid_warn(hid, "Failed to disable supply: %d\n", ret);
- }
-
- return 0;
-}
-
-static int i2c_hid_resume(struct device *dev)
-{
- int ret;
- struct i2c_client *client = to_i2c_client(dev);
- struct i2c_hid *ihid = i2c_get_clientdata(client);
- struct hid_device *hid = ihid->hid;
- int wake_status;
-
- if (!device_may_wakeup(&client->dev)) {
- ret = regulator_enable(ihid->pdata.supply);
- if (ret < 0)
- hid_warn(hid, "Failed to enable supply: %d\n", ret);
- if (ihid->pdata.post_power_delay_ms)
- msleep(ihid->pdata.post_power_delay_ms);
- } else if (ihid->irq_wake_enabled) {
- wake_status = disable_irq_wake(client->irq);
- if (!wake_status)
- ihid->irq_wake_enabled = false;
- else
- hid_warn(hid, "Failed to disable irq wake: %d\n",
- wake_status);
- }
-
- /* We'll resume to full power */
- pm_runtime_disable(dev);
- pm_runtime_set_active(dev);
- pm_runtime_enable(dev);
-
- enable_irq(client->irq);
- ret = i2c_hid_hwreset(client);
- if (ret)
- return ret;
-
- if (hid->driver && hid->driver->reset_resume) {
- ret = hid->driver->reset_resume(hid);
- return ret;
- }
-
- return 0;
-}
-#endif
-
-#ifdef CONFIG_PM
-static int i2c_hid_runtime_suspend(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
-
- i2c_hid_set_power(client, I2C_HID_PWR_SLEEP);
- disable_irq(client->irq);
- return 0;
-}
-
-static int i2c_hid_runtime_resume(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
-
- enable_irq(client->irq);
- i2c_hid_set_power(client, I2C_HID_PWR_ON);
- return 0;
-}
-#endif
-
-static const struct dev_pm_ops i2c_hid_pm = {
- SET_SYSTEM_SLEEP_PM_OPS(i2c_hid_suspend, i2c_hid_resume)
- SET_RUNTIME_PM_OPS(i2c_hid_runtime_suspend, i2c_hid_runtime_resume,
- NULL)
-};
-
-static const struct i2c_device_id i2c_hid_id_table[] = {
- { "hid", 0 },
- { "hid-over-i2c", 0 },
- { },
-};
-MODULE_DEVICE_TABLE(i2c, i2c_hid_id_table);
-
-
-static struct i2c_driver i2c_hid_driver = {
- .driver = {
- .name = "i2c_hid",
- .pm = &i2c_hid_pm,
- .acpi_match_table = ACPI_PTR(i2c_hid_acpi_match),
- .of_match_table = of_match_ptr(i2c_hid_of_match),
- },
-
- .probe = i2c_hid_probe,
- .remove = i2c_hid_remove,
- .shutdown = i2c_hid_shutdown,
- .id_table = i2c_hid_id_table,
-};
-
-module_i2c_driver(i2c_hid_driver);
-
-MODULE_DESCRIPTION("HID over I2C core driver");
-MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
-MODULE_LICENSE("GPL");
diff --git a/drivers/hid/i2c-hid/i2c-hid.h b/drivers/hid/i2c-hid/i2c-hid.h
new file mode 100644
index 000000000000..a8c19aef5824
--- /dev/null
+++ b/drivers/hid/i2c-hid/i2c-hid.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#ifndef I2C_HID_H
+#define I2C_HID_H
+
+
+#ifdef CONFIG_DMI
+struct i2c_hid_desc *i2c_hid_get_dmi_i2c_hid_desc_override(uint8_t *i2c_name);
+char *i2c_hid_get_dmi_hid_report_desc_override(uint8_t *i2c_name,
+ unsigned int *size);
+#else
+static inline struct i2c_hid_desc
+ *i2c_hid_get_dmi_i2c_hid_desc_override(uint8_t *i2c_name)
+{ return NULL; }
+static inline char *i2c_hid_get_dmi_hid_report_desc_override(uint8_t *i2c_name,
+ unsigned int *size)
+{ return NULL; }
+#endif
+
+#endif
diff --git a/drivers/hwtracing/coresight/coresight-cpu-debug.c b/drivers/hwtracing/coresight/coresight-cpu-debug.c
index 9cdb3fbc8c1f..2f6f46ea68e9 100644
--- a/drivers/hwtracing/coresight/coresight-cpu-debug.c
+++ b/drivers/hwtracing/coresight/coresight-cpu-debug.c
@@ -680,6 +680,10 @@ static const struct amba_id debug_ids[] = {
.id = 0x000bbd08,
.mask = 0x000fffff,
},
+ { /* Debug for Cortex-A73 */
+ .id = 0x000bbd09,
+ .mask = 0x000fffff,
+ },
{ 0, 0 },
};

diff --git a/drivers/infiniband/hw/mlx4/alias_GUID.c b/drivers/infiniband/hw/mlx4/alias_GUID.c
index 155b4dfc0ae8..baab9afa9174 100644
--- a/drivers/infiniband/hw/mlx4/alias_GUID.c
+++ b/drivers/infiniband/hw/mlx4/alias_GUID.c
@@ -804,8 +804,8 @@ void mlx4_ib_destroy_alias_guid_service(struct mlx4_ib_dev *dev)
unsigned long flags;

for (i = 0 ; i < dev->num_ports; i++) {
- cancel_delayed_work(&dev->sriov.alias_guid.ports_guid[i].alias_guid_work);
det = &sriov->alias_guid.ports_guid[i];
+ cancel_delayed_work_sync(&det->alias_guid_work);
spin_lock_irqsave(&sriov->alias_guid.ag_work_lock, flags);
while (!list_empty(&det->cb_list)) {
cb_ctx = list_entry(det->cb_list.next,
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index c0d1c4db5794..38d0128b8135 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -144,7 +144,7 @@ dmar_alloc_pci_notify_info(struct pci_dev *dev, unsigned long event)
for (tmp = dev; tmp; tmp = tmp->bus->self)
level++;

- size = sizeof(*info) + level * sizeof(struct acpi_dmar_pci_path);
+ size = sizeof(*info) + level * sizeof(info->path[0]);
if (size <= sizeof(dmar_pci_notify_info_buf)) {
info = (struct dmar_pci_notify_info *)dmar_pci_notify_info_buf;
} else {
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 802ba7b16e09..fe935293fa7b 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -1646,6 +1646,9 @@ static void iommu_disable_protect_mem_regions(struct intel_iommu *iommu)
u32 pmen;
unsigned long flags;

+ if (!cap_plmr(iommu->cap) && !cap_phmr(iommu->cap))
+ return;
+
raw_spin_lock_irqsave(&iommu->register_lock, flags);
pmen = readl(iommu->reg + DMAR_PMEN_REG);
pmen &= ~DMA_PMEN_EPM;
diff --git a/drivers/irqchip/irq-mbigen.c b/drivers/irqchip/irq-mbigen.c
index 567b29c47608..98b6e1d4b1a6 100644
--- a/drivers/irqchip/irq-mbigen.c
+++ b/drivers/irqchip/irq-mbigen.c
@@ -161,6 +161,9 @@ static void mbigen_write_msg(struct msi_desc *desc, struct msi_msg *msg)
void __iomem *base = d->chip_data;
u32 val;

+ if (!msg->address_lo && !msg->address_hi)
+ return;
+
base += get_mbigen_vec_reg(d->hwirq);
val = readl_relaxed(base);

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 0d2005e5b24c..94b8d81f6020 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -334,7 +334,7 @@ static int crypt_iv_essiv_init(struct crypt_config *cc)

sg_init_one(&sg, cc->key, cc->key_size);
ahash_request_set_tfm(req, essiv->hash_tfm);
- ahash_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP, NULL, NULL);
+ ahash_request_set_callback(req, 0, NULL, NULL);
ahash_request_set_crypt(req, &sg, essiv->salt, cc->key_size);

err = crypto_ahash_digest(req);
@@ -609,7 +609,7 @@ static int crypt_iv_lmk_one(struct crypt_config *cc, u8 *iv,
int i, r;

desc->tfm = lmk->hash_tfm;
- desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
+ desc->flags = 0;

r = crypto_shash_init(desc);
if (r)
@@ -771,7 +771,7 @@ static int crypt_iv_tcw_whitening(struct crypt_config *cc,

/* calculate crc32 for every 32bit part and xor it */
desc->tfm = tcw->crc32_tfm;
- desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
+ desc->flags = 0;
for (i = 0; i < 4; i++) {
r = crypto_shash_init(desc);
if (r)
@@ -1254,7 +1254,7 @@ static void crypt_alloc_req_skcipher(struct crypt_config *cc,
* requests if driver request queue is full.
*/
skcipher_request_set_callback(ctx->r.req,
- CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP,
+ CRYPTO_TFM_REQ_MAY_BACKLOG,
kcryptd_async_done, dmreq_of_req(cc, ctx->r.req));
}

@@ -1271,7 +1271,7 @@ static void crypt_alloc_req_aead(struct crypt_config *cc,
* requests if driver request queue is full.
*/
aead_request_set_callback(ctx->r.req_aead,
- CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP,
+ CRYPTO_TFM_REQ_MAY_BACKLOG,
kcryptd_async_done, dmreq_of_req(cc, ctx->r.req_aead));
}

diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index da4baea9cf83..036379a23499 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -493,7 +493,7 @@ static void section_mac(struct dm_integrity_c *ic, unsigned section, __u8 result
unsigned j, size;

desc->tfm = ic->journal_mac;
- desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
+ desc->flags = 0;

r = crypto_shash_init(desc);
if (unlikely(r)) {
@@ -637,7 +637,7 @@ static void complete_journal_encrypt(struct crypto_async_request *req, int err)
static bool do_crypt(bool encrypt, struct skcipher_request *req, struct journal_completion *comp)
{
int r;
- skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP,
+ skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
complete_journal_encrypt, comp);
if (likely(encrypt))
r = crypto_skcipher_encrypt(req);
diff --git a/drivers/media/usb/au0828/au0828-core.c b/drivers/media/usb/au0828/au0828-core.c
index cd363a2100d4..257ae0d8cfe2 100644
--- a/drivers/media/usb/au0828/au0828-core.c
+++ b/drivers/media/usb/au0828/au0828-core.c
@@ -629,7 +629,6 @@ static int au0828_usb_probe(struct usb_interface *interface,
pr_err("%s() au0282_dev_register failed to register on V4L2\n",
__func__);
mutex_unlock(&dev->lock);
- kfree(dev);
goto done;
}

diff --git a/drivers/misc/lkdtm.h b/drivers/misc/lkdtm.h
index 687a0dbbe199..614612325332 100644
--- a/drivers/misc/lkdtm.h
+++ b/drivers/misc/lkdtm.h
@@ -45,7 +45,9 @@ void lkdtm_EXEC_KMALLOC(void);
void lkdtm_EXEC_VMALLOC(void);
void lkdtm_EXEC_RODATA(void);
void lkdtm_EXEC_USERSPACE(void);
+void lkdtm_EXEC_NULL(void);
void lkdtm_ACCESS_USERSPACE(void);
+void lkdtm_ACCESS_NULL(void);

/* lkdtm_refcount.c */
void lkdtm_REFCOUNT_INC_OVERFLOW(void);
diff --git a/drivers/misc/lkdtm_core.c b/drivers/misc/lkdtm_core.c
index 981b3ef71e47..199271708aed 100644
--- a/drivers/misc/lkdtm_core.c
+++ b/drivers/misc/lkdtm_core.c
@@ -220,7 +220,9 @@ struct crashtype crashtypes[] = {
CRASHTYPE(EXEC_VMALLOC),
CRASHTYPE(EXEC_RODATA),
CRASHTYPE(EXEC_USERSPACE),
+ CRASHTYPE(EXEC_NULL),
CRASHTYPE(ACCESS_USERSPACE),
+ CRASHTYPE(ACCESS_NULL),
CRASHTYPE(WRITE_RO),
CRASHTYPE(WRITE_RO_AFTER_INIT),
CRASHTYPE(WRITE_KERN),
diff --git a/drivers/misc/lkdtm_perms.c b/drivers/misc/lkdtm_perms.c
index 53b85c9d16b8..62f76d506f04 100644
--- a/drivers/misc/lkdtm_perms.c
+++ b/drivers/misc/lkdtm_perms.c
@@ -47,7 +47,7 @@ static noinline void execute_location(void *dst, bool write)
{
void (*func)(void) = dst;

- pr_info("attempting ok execution at %p\n", do_nothing);
+ pr_info("attempting ok execution at %px\n", do_nothing);
do_nothing();

if (write == CODE_WRITE) {
@@ -55,7 +55,7 @@ static noinline void execute_location(void *dst, bool write)
flush_icache_range((unsigned long)dst,
(unsigned long)dst + EXEC_SIZE);
}
- pr_info("attempting bad execution at %p\n", func);
+ pr_info("attempting bad execution at %px\n", func);
func();
}

@@ -66,14 +66,14 @@ static void execute_user_location(void *dst)
/* Intentionally crossing kernel/user memory boundary. */
void (*func)(void) = dst;

- pr_info("attempting ok execution at %p\n", do_nothing);
+ pr_info("attempting ok execution at %px\n", do_nothing);
do_nothing();

copied = access_process_vm(current, (unsigned long)dst, do_nothing,
EXEC_SIZE, FOLL_WRITE);
if (copied < EXEC_SIZE)
return;
- pr_info("attempting bad execution at %p\n", func);
+ pr_info("attempting bad execution at %px\n", func);
func();
}

@@ -82,7 +82,7 @@ void lkdtm_WRITE_RO(void)
/* Explicitly cast away "const" for the test. */
unsigned long *ptr = (unsigned long *)&rodata;

- pr_info("attempting bad rodata write at %p\n", ptr);
+ pr_info("attempting bad rodata write at %px\n", ptr);
*ptr ^= 0xabcd1234;
}

@@ -100,7 +100,7 @@ void lkdtm_WRITE_RO_AFTER_INIT(void)
return;
}

- pr_info("attempting bad ro_after_init write at %p\n", ptr);
+ pr_info("attempting bad ro_after_init write at %px\n", ptr);
*ptr ^= 0xabcd1234;
}

@@ -112,7 +112,7 @@ void lkdtm_WRITE_KERN(void)
size = (unsigned long)do_overwritten - (unsigned long)do_nothing;
ptr = (unsigned char *)do_overwritten;

- pr_info("attempting bad %zu byte write at %p\n", size, ptr);
+ pr_info("attempting bad %zu byte write at %px\n", size, ptr);
memcpy(ptr, (unsigned char *)do_nothing, size);
flush_icache_range((unsigned long)ptr, (unsigned long)(ptr + size));

@@ -164,6 +164,11 @@ void lkdtm_EXEC_USERSPACE(void)
vm_munmap(user_addr, PAGE_SIZE);
}

+void lkdtm_EXEC_NULL(void)
+{
+ execute_location(NULL, CODE_AS_IS);
+}
+
void lkdtm_ACCESS_USERSPACE(void)
{
unsigned long user_addr, tmp = 0;
@@ -185,16 +190,29 @@ void lkdtm_ACCESS_USERSPACE(void)

ptr = (unsigned long *)user_addr;

- pr_info("attempting bad read at %p\n", ptr);
+ pr_info("attempting bad read at %px\n", ptr);
tmp = *ptr;
tmp += 0xc0dec0de;

- pr_info("attempting bad write at %p\n", ptr);
+ pr_info("attempting bad write at %px\n", ptr);
*ptr = tmp;

vm_munmap(user_addr, PAGE_SIZE);
}

+void lkdtm_ACCESS_NULL(void)
+{
+ unsigned long tmp;
+ unsigned long *ptr = (unsigned long *)NULL;
+
+ pr_info("attempting bad read at %px\n", ptr);
+ tmp = *ptr;
+ tmp += 0xc0dec0de;
+
+ pr_info("attempting bad write at %px\n", ptr);
+ *ptr = tmp;
+}
+
void __init lkdtm_perms_init(void)
{
/* Make sure we can write to __ro_after_init values during __init */
diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c
index 351330dfb954..1bd1819cca7d 100644
--- a/drivers/mmc/host/davinci_mmc.c
+++ b/drivers/mmc/host/davinci_mmc.c
@@ -1118,7 +1118,7 @@ static inline void mmc_davinci_cpufreq_deregister(struct mmc_davinci_host *host)
{
}
#endif
-static void __init init_mmcsd_host(struct mmc_davinci_host *host)
+static void init_mmcsd_host(struct mmc_davinci_host *host)
{

mmc_davinci_reset_ctrl(host, 1);
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/verifier.c b/drivers/net/ethernet/netronome/nfp/bpf/verifier.c
index 5b783a91b115..8793fa57f844 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/verifier.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/verifier.c
@@ -76,9 +76,9 @@ nfp_bpf_goto_meta(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta,

static int
nfp_bpf_check_exit(struct nfp_prog *nfp_prog,
- const struct bpf_verifier_env *env)
+ struct bpf_verifier_env *env)
{
- const struct bpf_reg_state *reg0 = &env->cur_state.regs[0];
+ const struct bpf_reg_state *reg0 = cur_regs(env) + BPF_REG_0;
u64 imm;

if (nfp_prog->act == NN_ACT_XDP)
@@ -113,9 +113,10 @@ nfp_bpf_check_exit(struct nfp_prog *nfp_prog,

static int
nfp_bpf_check_ctx_ptr(struct nfp_prog *nfp_prog,
- const struct bpf_verifier_env *env, u8 reg)
+ struct bpf_verifier_env *env, u8 reg_no)
{
- if (env->cur_state.regs[reg].type != PTR_TO_CTX)
+ const struct bpf_reg_state *reg = cur_regs(env) + reg_no;
+ if (reg->type != PTR_TO_CTX)
return -EINVAL;

return 0;
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 4a9dbee6f054..f2429ec07b57 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -2536,9 +2536,6 @@ static int stmmac_hw_setup(struct net_device *dev, bool init_ptp)
netdev_warn(priv->dev, "%s: failed debugFS registration\n",
__func__);
#endif
- /* Start the ball rolling... */
- stmmac_start_all_dma(priv);
-
priv->tx_lpi_timer = STMMAC_DEFAULT_TWT_LS;

if ((priv->use_riwt) && (priv->hw->dma->rx_watchdog)) {
@@ -2558,6 +2555,9 @@ static int stmmac_hw_setup(struct net_device *dev, bool init_ptp)
priv->hw->dma->enable_tso(priv->ioaddr, 1, chan);
}

+ /* Start the ball rolling... */
+ stmmac_start_all_dma(priv);
+
return 0;
}

diff --git a/drivers/net/wireless/rsi/rsi_common.h b/drivers/net/wireless/rsi/rsi_common.h
index e579d694d13c..21986ba56a3c 100644
--- a/drivers/net/wireless/rsi/rsi_common.h
+++ b/drivers/net/wireless/rsi/rsi_common.h
@@ -74,7 +74,6 @@ static inline int rsi_kill_thread(struct rsi_thread *handle)
atomic_inc(&handle->thread_done);
rsi_set_event(&handle->event);

- wait_for_completion(&handle->completion);
return kthread_stop(handle->task);
}

diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index f6542c159ed6..b4d06bd9ed51 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -2185,6 +2185,8 @@ void iscsi_remove_session(struct iscsi_cls_session *session)
scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
/* flush running scans then delete devices */
flush_work(&session->scan_work);
+ /* flush running unbind operations */
+ flush_work(&session->unbind_work);
__iscsi_unbind_session(&session->unbind_work);

/* hw iscsi may not have removed all connections from session */
diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
index 7e9ef3431bea..2422ed56895a 100644
--- a/drivers/soc/tegra/pmc.c
+++ b/drivers/soc/tegra/pmc.c
@@ -521,16 +521,10 @@ EXPORT_SYMBOL(tegra_powergate_power_off);
*/
int tegra_powergate_is_powered(unsigned int id)
{
- int status;
-
if (!tegra_powergate_is_valid(id))
return -EINVAL;

- mutex_lock(&pmc->powergates_lock);
- status = tegra_powergate_state(id);
- mutex_unlock(&pmc->powergates_lock);
-
- return status;
+ return tegra_powergate_state(id);
}

/**
diff --git a/drivers/thermal/broadcom/bcm2835_thermal.c b/drivers/thermal/broadcom/bcm2835_thermal.c
index 24b006a95142..8646fb7425f2 100644
--- a/drivers/thermal/broadcom/bcm2835_thermal.c
+++ b/drivers/thermal/broadcom/bcm2835_thermal.c
@@ -128,8 +128,7 @@ static const struct debugfs_reg32 bcm2835_thermal_regs[] = {

static void bcm2835_thermal_debugfs(struct platform_device *pdev)
{
- struct thermal_zone_device *tz = platform_get_drvdata(pdev);
- struct bcm2835_thermal_data *data = tz->devdata;
+ struct bcm2835_thermal_data *data = platform_get_drvdata(pdev);
struct debugfs_regset32 *regset;

data->debugfsdir = debugfs_create_dir("bcm2835_thermal", NULL);
@@ -275,7 +274,7 @@ static int bcm2835_thermal_probe(struct platform_device *pdev)

data->tz = tz;

- platform_set_drvdata(pdev, tz);
+ platform_set_drvdata(pdev, data);

/*
* Thermal_zone doesn't enable hwmon as default,
@@ -299,8 +298,8 @@ static int bcm2835_thermal_probe(struct platform_device *pdev)

static int bcm2835_thermal_remove(struct platform_device *pdev)
{
- struct thermal_zone_device *tz = platform_get_drvdata(pdev);
- struct bcm2835_thermal_data *data = tz->devdata;
+ struct bcm2835_thermal_data *data = platform_get_drvdata(pdev);
+ struct thermal_zone_device *tz = data->tz;

debugfs_remove_recursive(data->debugfsdir);
thermal_zone_of_sensor_unregister(&pdev->dev, tz);
diff --git a/drivers/thermal/int340x_thermal/int3400_thermal.c b/drivers/thermal/int340x_thermal/int3400_thermal.c
index 43b90fd577e4..4a20f4d47b1d 100644
--- a/drivers/thermal/int340x_thermal/int3400_thermal.c
+++ b/drivers/thermal/int340x_thermal/int3400_thermal.c
@@ -22,6 +22,13 @@ enum int3400_thermal_uuid {
INT3400_THERMAL_PASSIVE_1,
INT3400_THERMAL_ACTIVE,
INT3400_THERMAL_CRITICAL,
+ INT3400_THERMAL_ADAPTIVE_PERFORMANCE,
+ INT3400_THERMAL_EMERGENCY_CALL_MODE,
+ INT3400_THERMAL_PASSIVE_2,
+ INT3400_THERMAL_POWER_BOSS,
+ INT3400_THERMAL_VIRTUAL_SENSOR,
+ INT3400_THERMAL_COOLING_MODE,
+ INT3400_THERMAL_HARDWARE_DUTY_CYCLING,
INT3400_THERMAL_MAXIMUM_UUID,
};

@@ -29,6 +36,13 @@ static char *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = {
"42A441D6-AE6A-462b-A84B-4A8CE79027D3",
"3A95C389-E4B8-4629-A526-C52C88626BAE",
"97C68AE7-15FA-499c-B8C9-5DA81D606E0A",
+ "63BE270F-1C11-48FD-A6F7-3AF253FF3E2D",
+ "5349962F-71E6-431D-9AE8-0A635B710AEE",
+ "9E04115A-AE87-4D1C-9500-0F3E340BFE75",
+ "F5A35014-C209-46A4-993A-EB56DE7530A1",
+ "6ED722A7-9240-48A5-B479-31EEF723D7CF",
+ "16CAF1B7-DD38-40ED-B1C1-1B8A1913D531",
+ "BE84BABF-C4D4-403D-B495-3128FD44dAC1",
};

struct int3400_thermal_priv {
@@ -302,10 +316,9 @@ static int int3400_thermal_probe(struct platform_device *pdev)

platform_set_drvdata(pdev, priv);

- if (priv->uuid_bitmap & 1 << INT3400_THERMAL_PASSIVE_1) {
- int3400_thermal_ops.get_mode = int3400_thermal_get_mode;
- int3400_thermal_ops.set_mode = int3400_thermal_set_mode;
- }
+ int3400_thermal_ops.get_mode = int3400_thermal_get_mode;
+ int3400_thermal_ops.set_mode = int3400_thermal_set_mode;
+
priv->thermal = thermal_zone_device_register("INT3400 Thermal", 0, 0,
priv, &int3400_thermal_ops,
&int3400_thermal_params, 0, 0);
diff --git a/drivers/thermal/intel_powerclamp.c b/drivers/thermal/intel_powerclamp.c
index d718cd179ddb..c3293fa2bb1b 100644
--- a/drivers/thermal/intel_powerclamp.c
+++ b/drivers/thermal/intel_powerclamp.c
@@ -101,7 +101,7 @@ struct powerclamp_worker_data {
bool clamping;
};

-static struct powerclamp_worker_data * __percpu worker_data;
+static struct powerclamp_worker_data __percpu *worker_data;
static struct thermal_cooling_device *cooling_dev;
static unsigned long *cpu_clamping_mask; /* bit map for tracking per cpu
* clamping kthread worker
@@ -494,7 +494,7 @@ static void start_power_clamp_worker(unsigned long cpu)
struct powerclamp_worker_data *w_data = per_cpu_ptr(worker_data, cpu);
struct kthread_worker *worker;

- worker = kthread_create_worker_on_cpu(cpu, 0, "kidle_inject/%ld", cpu);
+ worker = kthread_create_worker_on_cpu(cpu, 0, "kidle_inj/%ld", cpu);
if (IS_ERR(worker))
return;

diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index f438a2158006..b0da63737aa1 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -1270,7 +1270,7 @@ static void cdns_uart_console_write(struct console *co, const char *s,
*
* Return: 0 on success, negative errno otherwise.
*/
-static int __init cdns_uart_console_setup(struct console *co, char *options)
+static int cdns_uart_console_setup(struct console *co, char *options)
{
struct uart_port *port = &cdns_uart_port[co->index];
int baud = 9600;
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index 8fb89ddc6cc7..c52f10efdc9c 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -61,6 +61,8 @@ enum {
Opt_cache_loose, Opt_fscache, Opt_mmap,
/* Access options */
Opt_access, Opt_posixacl,
+ /* Lock timeout option */
+ Opt_locktimeout,
/* Error token */
Opt_err
};
@@ -80,6 +82,7 @@ static const match_table_t tokens = {
{Opt_cachetag, "cachetag=%s"},
{Opt_access, "access=%s"},
{Opt_posixacl, "posixacl"},
+ {Opt_locktimeout, "locktimeout=%u"},
{Opt_err, NULL}
};

@@ -187,6 +190,7 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
#ifdef CONFIG_9P_FSCACHE
v9ses->cachetag = NULL;
#endif
+ v9ses->session_lock_timeout = P9_LOCK_TIMEOUT;

if (!opts)
return 0;
@@ -360,6 +364,23 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
#endif
break;

+ case Opt_locktimeout:
+ r = match_int(&args[0], &option);
+ if (r < 0) {
+ p9_debug(P9_DEBUG_ERROR,
+ "integer field, but no integer?\n");
+ ret = r;
+ continue;
+ }
+ if (option < 1) {
+ p9_debug(P9_DEBUG_ERROR,
+ "locktimeout must be a greater than zero integer.\n");
+ ret = -EINVAL;
+ continue;
+ }
+ v9ses->session_lock_timeout = (long)option * HZ;
+ break;
+
default:
continue;
}
diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index 982e017acadb..129e5243a6bf 100644
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -116,6 +116,7 @@ struct v9fs_session_info {
struct p9_client *clnt; /* 9p client */
struct list_head slist; /* list of sessions registered with v9fs */
struct rw_semaphore rename_sem;
+ long session_lock_timeout; /* retry interval for blocking locks */
};

/* cache_validity flags */
diff --git a/fs/9p/vfs_dir.c b/fs/9p/vfs_dir.c
index 48db9a9f13f9..cb6c4031af55 100644
--- a/fs/9p/vfs_dir.c
+++ b/fs/9p/vfs_dir.c
@@ -105,7 +105,6 @@ static int v9fs_dir_readdir(struct file *file, struct dir_context *ctx)
int err = 0;
struct p9_fid *fid;
int buflen;
- int reclen = 0;
struct p9_rdir *rdir;
struct kvec kvec;

@@ -138,11 +137,10 @@ static int v9fs_dir_readdir(struct file *file, struct dir_context *ctx)
while (rdir->head < rdir->tail) {
err = p9stat_read(fid->clnt, rdir->buf + rdir->head,
rdir->tail - rdir->head, &st);
- if (err) {
+ if (err <= 0) {
p9_debug(P9_DEBUG_VFS, "returned %d\n", err);
return -EIO;
}
- reclen = st.size+2;

over = !dir_emit(ctx, st.name, strlen(st.name),
v9fs_qid2ino(&st.qid), dt_type(&st));
@@ -150,8 +148,8 @@ static int v9fs_dir_readdir(struct file *file, struct dir_context *ctx)
if (over)
return 0;

- rdir->head += reclen;
- ctx->pos += reclen;
+ rdir->head += err;
+ ctx->pos += err;
}
}
}
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index af8cac975a74..89e69904976a 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -154,6 +154,7 @@ static int v9fs_file_do_lock(struct file *filp, int cmd, struct file_lock *fl)
uint8_t status = P9_LOCK_ERROR;
int res = 0;
unsigned char fl_type;
+ struct v9fs_session_info *v9ses;

fid = filp->private_data;
BUG_ON(fid == NULL);
@@ -189,6 +190,8 @@ static int v9fs_file_do_lock(struct file *filp, int cmd, struct file_lock *fl)
if (IS_SETLKW(cmd))
flock.flags = P9_LOCK_FLAGS_BLOCK;

+ v9ses = v9fs_inode2v9ses(file_inode(filp));
+
/*
* if its a blocked request and we get P9_LOCK_BLOCKED as the status
* for lock request, keep on trying
@@ -202,7 +205,8 @@ static int v9fs_file_do_lock(struct file *filp, int cmd, struct file_lock *fl)
break;
if (status == P9_LOCK_BLOCKED && !IS_SETLKW(cmd))
break;
- if (schedule_timeout_interruptible(P9_LOCK_TIMEOUT) != 0)
+ if (schedule_timeout_interruptible(v9ses->session_lock_timeout)
+ != 0)
break;
/*
* p9_client_lock_dotl overwrites flock.client_id with the
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index a90a637ae79a..6fd4a6a75234 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -779,43 +779,50 @@ cifs_get_inode_info(struct inode **inode, const char *full_path,
} else if ((rc == -EACCES) && backup_cred(cifs_sb) &&
(strcmp(server->vals->version_string, SMB1_VERSION_STRING)
== 0)) {
- /*
- * For SMB2 and later the backup intent flag is already
- * sent if needed on open and there is no path based
- * FindFirst operation to use to retry with
- */
+ /*
+ * For SMB2 and later the backup intent flag is already
+ * sent if needed on open and there is no path based
+ * FindFirst operation to use to retry with
+ */

- srchinf = kzalloc(sizeof(struct cifs_search_info),
- GFP_KERNEL);
- if (srchinf == NULL) {
- rc = -ENOMEM;
- goto cgii_exit;
- }
+ srchinf = kzalloc(sizeof(struct cifs_search_info),
+ GFP_KERNEL);
+ if (srchinf == NULL) {
+ rc = -ENOMEM;
+ goto cgii_exit;
+ }

- srchinf->endOfSearch = false;
+ srchinf->endOfSearch = false;
+ if (tcon->unix_ext)
+ srchinf->info_level = SMB_FIND_FILE_UNIX;
+ else if ((tcon->ses->capabilities &
+ tcon->ses->server->vals->cap_nt_find) == 0)
+ srchinf->info_level = SMB_FIND_FILE_INFO_STANDARD;
+ else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
srchinf->info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
+ else /* no srvino useful for fallback to some netapp */
+ srchinf->info_level = SMB_FIND_FILE_DIRECTORY_INFO;

- srchflgs = CIFS_SEARCH_CLOSE_ALWAYS |
- CIFS_SEARCH_CLOSE_AT_END |
- CIFS_SEARCH_BACKUP_SEARCH;
+ srchflgs = CIFS_SEARCH_CLOSE_ALWAYS |
+ CIFS_SEARCH_CLOSE_AT_END |
+ CIFS_SEARCH_BACKUP_SEARCH;

- rc = CIFSFindFirst(xid, tcon, full_path,
- cifs_sb, NULL, srchflgs, srchinf, false);
- if (!rc) {
- data =
- (FILE_ALL_INFO *)srchinf->srch_entries_start;
+ rc = CIFSFindFirst(xid, tcon, full_path,
+ cifs_sb, NULL, srchflgs, srchinf, false);
+ if (!rc) {
+ data = (FILE_ALL_INFO *)srchinf->srch_entries_start;

- cifs_dir_info_to_fattr(&fattr,
- (FILE_DIRECTORY_INFO *)data, cifs_sb);
- fattr.cf_uniqueid = le64_to_cpu(
- ((SEARCH_ID_FULL_DIR_INFO *)data)->UniqueId);
- validinum = true;
+ cifs_dir_info_to_fattr(&fattr,
+ (FILE_DIRECTORY_INFO *)data, cifs_sb);
+ fattr.cf_uniqueid = le64_to_cpu(
+ ((SEARCH_ID_FULL_DIR_INFO *)data)->UniqueId);
+ validinum = true;

- cifs_buf_release(srchinf->ntwrk_buf_start);
- }
- kfree(srchinf);
- if (rc)
- goto cgii_exit;
+ cifs_buf_release(srchinf->ntwrk_buf_start);
+ }
+ kfree(srchinf);
+ if (rc)
+ goto cgii_exit;
} else
goto cgii_exit;

diff --git a/fs/cifs/smb2maperror.c b/fs/cifs/smb2maperror.c
index d7e839cb773f..92c9cdf4704d 100644
--- a/fs/cifs/smb2maperror.c
+++ b/fs/cifs/smb2maperror.c
@@ -1035,7 +1035,8 @@ static const struct status_to_posix_error smb2_error_map_table[] = {
{STATUS_UNFINISHED_CONTEXT_DELETED, -EIO,
"STATUS_UNFINISHED_CONTEXT_DELETED"},
{STATUS_NO_TGT_REPLY, -EIO, "STATUS_NO_TGT_REPLY"},
- {STATUS_OBJECTID_NOT_FOUND, -EIO, "STATUS_OBJECTID_NOT_FOUND"},
+ /* Note that ENOATTTR and ENODATA are the same errno */
+ {STATUS_OBJECTID_NOT_FOUND, -ENODATA, "STATUS_OBJECTID_NOT_FOUND"},
{STATUS_NO_IP_ADDRESSES, -EIO, "STATUS_NO_IP_ADDRESSES"},
{STATUS_WRONG_CREDENTIAL_HANDLE, -EIO,
"STATUS_WRONG_CREDENTIAL_HANDLE"},
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 7917cc89ab21..3dbf4e414706 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -940,6 +940,13 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
if (!blk_queue_discard(q))
return -EOPNOTSUPP;

+ /*
+ * We haven't replayed the journal, so we cannot use our
+ * block-bitmap-guided storage zapping commands.
+ */
+ if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb))
+ return -EROFS;
+
if (copy_from_user(&range, (struct fstrim_range __user *)arg,
sizeof(range)))
return -EFAULT;
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 6f0acfe31418..333fba05e1a5 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -907,11 +907,18 @@ static int add_new_gdb_meta_bg(struct super_block *sb,
memcpy(n_group_desc, o_group_desc,
EXT4_SB(sb)->s_gdb_count * sizeof(struct buffer_head *));
n_group_desc[gdb_num] = gdb_bh;
+
+ BUFFER_TRACE(gdb_bh, "get_write_access");
+ err = ext4_journal_get_write_access(handle, gdb_bh);
+ if (err) {
+ kvfree(n_group_desc);
+ brelse(gdb_bh);
+ return err;
+ }
+
EXT4_SB(sb)->s_group_desc = n_group_desc;
EXT4_SB(sb)->s_gdb_count++;
kvfree(o_group_desc);
- BUFFER_TRACE(gdb_bh, "get_write_access");
- err = ext4_journal_get_write_access(handle, gdb_bh);
return err;
}

@@ -2042,6 +2049,10 @@ int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count)
free_flex_gd(flex_gd);
if (resize_inode != NULL)
iput(resize_inode);
- ext4_msg(sb, KERN_INFO, "resized filesystem to %llu", n_blocks_count);
+ if (err)
+ ext4_warning(sb, "error (%d) occurred during "
+ "file system resize", err);
+ ext4_msg(sb, KERN_INFO, "resized filesystem to %llu",
+ ext4_blocks_count(es));
return err;
}
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index fc5c41257e68..4c169ba50c0f 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1959,7 +1959,7 @@ int sanity_check_ckpt(struct f2fs_sb_info *sbi)
unsigned int segment_count_main;
unsigned int cp_pack_start_sum, cp_payload;
block_t user_block_count;
- int i;
+ int i, j;

total = le32_to_cpu(raw_super->segment_count);
fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
@@ -2000,11 +2000,43 @@ int sanity_check_ckpt(struct f2fs_sb_info *sbi)
if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
return 1;
+ for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
+ if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
+ le32_to_cpu(ckpt->cur_node_segno[j])) {
+ f2fs_msg(sbi->sb, KERN_ERR,
+ "Node segment (%u, %u) has the same "
+ "segno: %u", i, j,
+ le32_to_cpu(ckpt->cur_node_segno[i]));
+ return 1;
+ }
+ }
}
for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
return 1;
+ for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
+ if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
+ le32_to_cpu(ckpt->cur_data_segno[j])) {
+ f2fs_msg(sbi->sb, KERN_ERR,
+ "Data segment (%u, %u) has the same "
+ "segno: %u", i, j,
+ le32_to_cpu(ckpt->cur_data_segno[i]));
+ return 1;
+ }
+ }
+ }
+ for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
+ for (j = i; j < NR_CURSEG_DATA_TYPE; j++) {
+ if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
+ le32_to_cpu(ckpt->cur_data_segno[j])) {
+ f2fs_msg(sbi->sb, KERN_ERR,
+ "Data segment (%u) and Data segment (%u)"
+ " has the same segno: %u", i, j,
+ le32_to_cpu(ckpt->cur_node_segno[i]));
+ return 1;
+ }
+ }
}

sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
diff --git a/include/linux/atalk.h b/include/linux/atalk.h
index 4d356e168692..03885e63f92b 100644
--- a/include/linux/atalk.h
+++ b/include/linux/atalk.h
@@ -151,19 +151,29 @@ extern int sysctl_aarp_retransmit_limit;
extern int sysctl_aarp_resolve_time;

#ifdef CONFIG_SYSCTL
-extern void atalk_register_sysctl(void);
+extern int atalk_register_sysctl(void);
extern void atalk_unregister_sysctl(void);
#else
-#define atalk_register_sysctl() do { } while(0)
-#define atalk_unregister_sysctl() do { } while(0)
+static inline int atalk_register_sysctl(void)
+{
+ return 0;
+}
+static inline void atalk_unregister_sysctl(void)
+{
+}
#endif

#ifdef CONFIG_PROC_FS
extern int atalk_proc_init(void);
extern void atalk_proc_exit(void);
#else
-#define atalk_proc_init() ({ 0; })
-#define atalk_proc_exit() do { } while(0)
+static inline int atalk_proc_init(void)
+{
+ return 0;
+}
+static inline void atalk_proc_exit(void)
+{
+}
#endif /* CONFIG_PROC_FS */

#endif /* __LINUX_ATALK_H__ */
diff --git a/include/linux/bpf_verifier.h b/include/linux/bpf_verifier.h
index 8458cc5fbce5..d8b3240cfe6e 100644
--- a/include/linux/bpf_verifier.h
+++ b/include/linux/bpf_verifier.h
@@ -91,14 +91,20 @@ enum bpf_stack_slot_type {

#define BPF_REG_SIZE 8 /* size of eBPF register in bytes */

+struct bpf_stack_state {
+ struct bpf_reg_state spilled_ptr;
+ u8 slot_type[BPF_REG_SIZE];
+};
+
/* state of the program:
* type of all registers and stack info
*/
struct bpf_verifier_state {
struct bpf_reg_state regs[MAX_BPF_REG];
- u8 stack_slot_type[MAX_BPF_STACK];
- struct bpf_reg_state spilled_regs[MAX_BPF_STACK / BPF_REG_SIZE];
struct bpf_verifier_state *parent;
+ int allocated_stack;
+ struct bpf_stack_state *stack;
+ bool speculative;
};

/* linked list of verifier states used to prune search */
@@ -107,14 +113,24 @@ struct bpf_verifier_state_list {
struct bpf_verifier_state_list *next;
};

+/* Possible states for alu_state member. */
+#define BPF_ALU_SANITIZE_SRC 1U
+#define BPF_ALU_SANITIZE_DST 2U
+#define BPF_ALU_NEG_VALUE (1U << 2)
+#define BPF_ALU_NON_POINTER (1U << 3)
+#define BPF_ALU_SANITIZE (BPF_ALU_SANITIZE_SRC | \
+ BPF_ALU_SANITIZE_DST)
+
struct bpf_insn_aux_data {
union {
enum bpf_reg_type ptr_type; /* pointer type for load/store insns */
struct bpf_map *map_ptr; /* pointer for call insn into lookup_elem */
+ u32 alu_limit; /* limit for add/sub register with pointer */
};
int ctx_field_size; /* the ctx field size for load insn, maybe 0 */
int sanitize_stack_off; /* stack slot to be cleared */
bool seen; /* this insn was processed by the verifier */
+ u8 alu_state; /* used in combination with alu_limit */
};

#define MAX_USED_MAPS 64 /* max number of maps accessed by one eBPF program */
@@ -129,11 +145,13 @@ struct bpf_ext_analyzer_ops {
* one verifier_env per bpf_check() call
*/
struct bpf_verifier_env {
+ u32 insn_idx;
+ u32 prev_insn_idx;
struct bpf_prog *prog; /* eBPF program being verified */
struct bpf_verifier_stack_elem *head; /* stack of verifier states to be processed */
int stack_size; /* number of states to be processed */
bool strict_alignment; /* perform strict pointer alignment checks */
- struct bpf_verifier_state cur_state; /* current verifier state */
+ struct bpf_verifier_state *cur_state; /* current verifier state */
struct bpf_verifier_state_list **explored_states; /* search pruning optimization */
const struct bpf_ext_analyzer_ops *analyzer_ops; /* external analyzer ops */
void *analyzer_priv; /* pointer to external analyzer's private data */
@@ -145,6 +163,11 @@ struct bpf_verifier_env {
struct bpf_insn_aux_data *insn_aux_data; /* array of per-insn state */
};

+static inline struct bpf_reg_state *cur_regs(struct bpf_verifier_env *env)
+{
+ return env->cur_state->regs;
+}
+
int bpf_analyzer(struct bpf_prog *prog, const struct bpf_ext_analyzer_ops *ops,
void *priv);

diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index a704d032713b..67c3934fb9ed 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -119,7 +119,10 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val,
# define ASM_UNREACHABLE
#endif
#ifndef unreachable
-# define unreachable() do { annotate_reachable(); do { } while (1); } while (0)
+# define unreachable() do { \
+ annotate_unreachable(); \
+ __builtin_unreachable(); \
+} while (0)
#endif

/*
diff --git a/include/linux/filter.h b/include/linux/filter.h
index 56d2cda9931b..ac2272778f2e 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -46,14 +46,10 @@ struct bpf_prog_aux;
#define BPF_REG_X BPF_REG_7
#define BPF_REG_TMP BPF_REG_8

-/* Kernel hidden auxiliary/helper register for hardening step.
- * Only used by eBPF JITs. It's nothing more than a temporary
- * register that JITs use internally, only that here it's part
- * of eBPF instructions that have been rewritten for blinding
- * constants. See JIT pre-step in bpf_jit_blind_constants().
- */
+/* Kernel hidden auxiliary/helper register. */
#define BPF_REG_AX MAX_BPF_REG
-#define MAX_BPF_JIT_REG (MAX_BPF_REG + 1)
+#define MAX_BPF_EXT_REG (MAX_BPF_REG + 1)
+#define MAX_BPF_JIT_REG MAX_BPF_EXT_REG

/* unused opcode to mark special call to bpf_tail_call() helper */
#define BPF_TAIL_CALL 0xf0
diff --git a/include/linux/swap.h b/include/linux/swap.h
index 4fd1ab9565ba..e643866912b7 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -155,9 +155,9 @@ struct swap_extent {
/*
* Max bad pages in the new format..
*/
-#define __swapoffset(x) ((unsigned long)&((union swap_header *)0)->x)
#define MAX_SWAP_BADPAGES \
- ((__swapoffset(magic.magic) - __swapoffset(info.badpages)) / sizeof(int))
+ ((offsetof(union swap_header, magic.magic) - \
+ offsetof(union swap_header, info.badpages)) / sizeof(int))

enum {
SWP_USED = (1 << 0), /* is slot in swap_info[] used? */
diff --git a/include/uapi/linux/netfilter/xt_cgroup.h b/include/uapi/linux/netfilter/xt_cgroup.h
index e96dfa1b34f7..b74e370d6133 100644
--- a/include/uapi/linux/netfilter/xt_cgroup.h
+++ b/include/uapi/linux/netfilter/xt_cgroup.h
@@ -22,4 +22,20 @@ struct xt_cgroup_info_v1 {
void *priv __attribute__((aligned(8)));
};

+#define XT_CGROUP_PATH_MAX 512
+
+struct xt_cgroup_info_v2 {
+ __u8 has_path;
+ __u8 has_classid;
+ __u8 invert_path;
+ __u8 invert_classid;
+ union {
+ char path[XT_CGROUP_PATH_MAX];
+ __u32 classid;
+ };
+
+ /* kernel internal data */
+ void *priv __attribute__((aligned(8)));
+};
+
#endif /* _UAPI_XT_CGROUP_H */
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index d203a5d6b726..e46106c6ac39 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -51,6 +51,7 @@
#define DST regs[insn->dst_reg]
#define SRC regs[insn->src_reg]
#define FP regs[BPF_REG_FP]
+#define AX regs[BPF_REG_AX]
#define ARG1 regs[BPF_REG_ARG1]
#define CTX regs[BPF_REG_CTX]
#define IMM insn->imm
@@ -552,6 +553,26 @@ static int bpf_jit_blind_insn(const struct bpf_insn *from,
BUILD_BUG_ON(BPF_REG_AX + 1 != MAX_BPF_JIT_REG);
BUILD_BUG_ON(MAX_BPF_REG + 1 != MAX_BPF_JIT_REG);

+ /* Constraints on AX register:
+ *
+ * AX register is inaccessible from user space. It is mapped in
+ * all JITs, and used here for constant blinding rewrites. It is
+ * typically "stateless" meaning its contents are only valid within
+ * the executed instruction, but not across several instructions.
+ * There are a few exceptions however which are further detailed
+ * below.
+ *
+ * Constant blinding is only used by JITs, not in the interpreter.
+ * The interpreter uses AX in some occasions as a local temporary
+ * register e.g. in DIV or MOD instructions.
+ *
+ * In restricted circumstances, the verifier can also use the AX
+ * register for rewrites as long as they do not interfere with
+ * the above cases!
+ */
+ if (from->dst_reg == BPF_REG_AX || from->src_reg == BPF_REG_AX)
+ goto out;
+
if (from->imm == 0 &&
(from->code == (BPF_ALU | BPF_MOV | BPF_K) ||
from->code == (BPF_ALU64 | BPF_MOV | BPF_K))) {
@@ -939,22 +960,22 @@ static unsigned int ___bpf_prog_run(u64 *regs, const struct bpf_insn *insn,
ALU64_MOD_X:
if (unlikely(SRC == 0))
return 0;
- div64_u64_rem(DST, SRC, &tmp);
- DST = tmp;
+ div64_u64_rem(DST, SRC, &AX);
+ DST = AX;
CONT;
ALU_MOD_X:
if (unlikely((u32)SRC == 0))
return 0;
- tmp = (u32) DST;
- DST = do_div(tmp, (u32) SRC);
+ AX = (u32) DST;
+ DST = do_div(AX, (u32) SRC);
CONT;
ALU64_MOD_K:
- div64_u64_rem(DST, IMM, &tmp);
- DST = tmp;
+ div64_u64_rem(DST, IMM, &AX);
+ DST = AX;
CONT;
ALU_MOD_K:
- tmp = (u32) DST;
- DST = do_div(tmp, (u32) IMM);
+ AX = (u32) DST;
+ DST = do_div(AX, (u32) IMM);
CONT;
ALU64_DIV_X:
if (unlikely(SRC == 0))
@@ -964,17 +985,17 @@ static unsigned int ___bpf_prog_run(u64 *regs, const struct bpf_insn *insn,
ALU_DIV_X:
if (unlikely((u32)SRC == 0))
return 0;
- tmp = (u32) DST;
- do_div(tmp, (u32) SRC);
- DST = (u32) tmp;
+ AX = (u32) DST;
+ do_div(AX, (u32) SRC);
+ DST = (u32) AX;
CONT;
ALU64_DIV_K:
DST = div64_u64(DST, IMM);
CONT;
ALU_DIV_K:
- tmp = (u32) DST;
- do_div(tmp, (u32) IMM);
- DST = (u32) tmp;
+ AX = (u32) DST;
+ do_div(AX, (u32) IMM);
+ DST = (u32) AX;
CONT;
ALU_END_TO_BE:
switch (IMM) {
@@ -1278,7 +1299,7 @@ STACK_FRAME_NON_STANDARD(___bpf_prog_run); /* jump table */
static unsigned int PROG_NAME(stack_size)(const void *ctx, const struct bpf_insn *insn) \
{ \
u64 stack[stack_size / sizeof(u64)]; \
- u64 regs[MAX_BPF_REG]; \
+ u64 regs[MAX_BPF_EXT_REG]; \
\
FP = (u64) (unsigned long) &stack[ARRAY_SIZE(stack)]; \
ARG1 = (u64) (unsigned long) ctx; \
diff --git a/kernel/bpf/inode.c b/kernel/bpf/inode.c
index be1dde967208..ccf9ffd5da78 100644
--- a/kernel/bpf/inode.c
+++ b/kernel/bpf/inode.c
@@ -365,19 +365,6 @@ int bpf_obj_get_user(const char __user *pathname)
}
EXPORT_SYMBOL_GPL(bpf_obj_get_user);

-static void bpf_evict_inode(struct inode *inode)
-{
- enum bpf_type type;
-
- truncate_inode_pages_final(&inode->i_data);
- clear_inode(inode);
-
- if (S_ISLNK(inode->i_mode))
- kfree(inode->i_link);
- if (!bpf_inode_type(inode, &type))
- bpf_any_put(inode->i_private, type);
-}
-
/*
* Display the mount options in /proc/mounts.
*/
@@ -390,11 +377,28 @@ static int bpf_show_options(struct seq_file *m, struct dentry *root)
return 0;
}

+static void bpf_destroy_inode_deferred(struct rcu_head *head)
+{
+ struct inode *inode = container_of(head, struct inode, i_rcu);
+ enum bpf_type type;
+
+ if (S_ISLNK(inode->i_mode))
+ kfree(inode->i_link);
+ if (!bpf_inode_type(inode, &type))
+ bpf_any_put(inode->i_private, type);
+ free_inode_nonrcu(inode);
+}
+
+static void bpf_destroy_inode(struct inode *inode)
+{
+ call_rcu(&inode->i_rcu, bpf_destroy_inode_deferred);
+}
+
static const struct super_operations bpf_super_ops = {
.statfs = simple_statfs,
.drop_inode = generic_delete_inode,
.show_options = bpf_show_options,
- .evict_inode = bpf_evict_inode,
+ .destroy_inode = bpf_destroy_inode,
};

enum {
diff --git a/kernel/bpf/map_in_map.c b/kernel/bpf/map_in_map.c
index 1da574612bea..c0c494b7647b 100644
--- a/kernel/bpf/map_in_map.c
+++ b/kernel/bpf/map_in_map.c
@@ -12,6 +12,7 @@
struct bpf_map *bpf_map_meta_alloc(int inner_map_ufd)
{
struct bpf_map *inner_map, *inner_map_meta;
+ u32 inner_map_meta_size;
struct fd f;

f = fdget(inner_map_ufd);
@@ -34,7 +35,12 @@ struct bpf_map *bpf_map_meta_alloc(int inner_map_ufd)
return ERR_PTR(-EINVAL);
}

- inner_map_meta = kzalloc(sizeof(*inner_map_meta), GFP_USER);
+ inner_map_meta_size = sizeof(*inner_map_meta);
+ /* In some cases verifier needs to access beyond just base map. */
+ if (inner_map->ops == &array_map_ops)
+ inner_map_meta_size = sizeof(struct bpf_array);
+
+ inner_map_meta = kzalloc(inner_map_meta_size, GFP_USER);
if (!inner_map_meta) {
fdput(f);
return ERR_PTR(-ENOMEM);
@@ -44,9 +50,16 @@ struct bpf_map *bpf_map_meta_alloc(int inner_map_ufd)
inner_map_meta->key_size = inner_map->key_size;
inner_map_meta->value_size = inner_map->value_size;
inner_map_meta->map_flags = inner_map->map_flags;
- inner_map_meta->ops = inner_map->ops;
inner_map_meta->max_entries = inner_map->max_entries;

+ /* Misc members not needed in bpf_map_meta_equal() check. */
+ inner_map_meta->ops = inner_map->ops;
+ if (inner_map->ops == &array_map_ops) {
+ inner_map_meta->unpriv_array = inner_map->unpriv_array;
+ container_of(inner_map_meta, struct bpf_array, map)->index_mask =
+ container_of(inner_map, struct bpf_array, map)->index_mask;
+ }
+
fdput(f);
return inner_map_meta;
}
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index f6755fd5bae2..a4875ff0bab1 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -265,10 +265,11 @@ static void print_verifier_state(struct bpf_verifier_state *state)
verbose(")");
}
}
- for (i = 0; i < MAX_BPF_STACK; i += BPF_REG_SIZE) {
- if (state->stack_slot_type[i] == STACK_SPILL)
- verbose(" fp%d=%s", -MAX_BPF_STACK + i,
- reg_type_str[state->spilled_regs[i / BPF_REG_SIZE].type]);
+ for (i = 0; i < state->allocated_stack / BPF_REG_SIZE; i++) {
+ if (state->stack[i].slot_type[0] == STACK_SPILL)
+ verbose(" fp%d=%s",
+ (-i - 1) * BPF_REG_SIZE,
+ reg_type_str[state->stack[i].spilled_ptr.type]);
}
verbose("\n");
}
@@ -434,40 +435,133 @@ static void print_bpf_insn(const struct bpf_verifier_env *env,
}
}

-static int pop_stack(struct bpf_verifier_env *env, int *prev_insn_idx)
+static int copy_stack_state(struct bpf_verifier_state *dst,
+ const struct bpf_verifier_state *src)
{
- struct bpf_verifier_stack_elem *elem;
- int insn_idx;
+ if (!src->stack)
+ return 0;
+ if (WARN_ON_ONCE(dst->allocated_stack < src->allocated_stack)) {
+ /* internal bug, make state invalid to reject the program */
+ memset(dst, 0, sizeof(*dst));
+ return -EFAULT;
+ }
+ memcpy(dst->stack, src->stack,
+ sizeof(*src->stack) * (src->allocated_stack / BPF_REG_SIZE));
+ return 0;
+}
+
+/* do_check() starts with zero-sized stack in struct bpf_verifier_state to
+ * make it consume minimal amount of memory. check_stack_write() access from
+ * the program calls into realloc_verifier_state() to grow the stack size.
+ * Note there is a non-zero 'parent' pointer inside bpf_verifier_state
+ * which this function copies over. It points to previous bpf_verifier_state
+ * which is never reallocated
+ */
+static int realloc_verifier_state(struct bpf_verifier_state *state, int size,
+ bool copy_old)
+{
+ u32 old_size = state->allocated_stack;
+ struct bpf_stack_state *new_stack;
+ int slot = size / BPF_REG_SIZE;
+
+ if (size <= old_size || !size) {
+ if (copy_old)
+ return 0;
+ state->allocated_stack = slot * BPF_REG_SIZE;
+ if (!size && old_size) {
+ kfree(state->stack);
+ state->stack = NULL;
+ }
+ return 0;
+ }
+ new_stack = kmalloc_array(slot, sizeof(struct bpf_stack_state),
+ GFP_KERNEL);
+ if (!new_stack)
+ return -ENOMEM;
+ if (copy_old) {
+ if (state->stack)
+ memcpy(new_stack, state->stack,
+ sizeof(*new_stack) * (old_size / BPF_REG_SIZE));
+ memset(new_stack + old_size / BPF_REG_SIZE, 0,
+ sizeof(*new_stack) * (size - old_size) / BPF_REG_SIZE);
+ }
+ state->allocated_stack = slot * BPF_REG_SIZE;
+ kfree(state->stack);
+ state->stack = new_stack;
+ return 0;
+}
+
+static void free_verifier_state(struct bpf_verifier_state *state,
+ bool free_self)
+{
+ kfree(state->stack);
+ if (free_self)
+ kfree(state);
+}
+
+/* copy verifier state from src to dst growing dst stack space
+ * when necessary to accommodate larger src stack
+ */
+static int copy_verifier_state(struct bpf_verifier_state *dst,
+ const struct bpf_verifier_state *src)
+{
+ int err;
+
+ err = realloc_verifier_state(dst, src->allocated_stack, false);
+ if (err)
+ return err;
+ memcpy(dst, src, offsetof(struct bpf_verifier_state, allocated_stack));
+ return copy_stack_state(dst, src);
+}
+
+static int pop_stack(struct bpf_verifier_env *env, int *prev_insn_idx,
+ int *insn_idx)
+{
+ struct bpf_verifier_state *cur = env->cur_state;
+ struct bpf_verifier_stack_elem *elem, *head = env->head;
+ int err;

if (env->head == NULL)
- return -1;
+ return -ENOENT;

- memcpy(&env->cur_state, &env->head->st, sizeof(env->cur_state));
- insn_idx = env->head->insn_idx;
+ if (cur) {
+ err = copy_verifier_state(cur, &head->st);
+ if (err)
+ return err;
+ }
+ if (insn_idx)
+ *insn_idx = head->insn_idx;
if (prev_insn_idx)
- *prev_insn_idx = env->head->prev_insn_idx;
- elem = env->head->next;
- kfree(env->head);
+ *prev_insn_idx = head->prev_insn_idx;
+ elem = head->next;
+ free_verifier_state(&head->st, false);
+ kfree(head);
env->head = elem;
env->stack_size--;
- return insn_idx;
+ return 0;
}

static struct bpf_verifier_state *push_stack(struct bpf_verifier_env *env,
- int insn_idx, int prev_insn_idx)
+ int insn_idx, int prev_insn_idx,
+ bool speculative)
{
struct bpf_verifier_stack_elem *elem;
+ struct bpf_verifier_state *cur = env->cur_state;
+ int err;

- elem = kmalloc(sizeof(struct bpf_verifier_stack_elem), GFP_KERNEL);
+ elem = kzalloc(sizeof(struct bpf_verifier_stack_elem), GFP_KERNEL);
if (!elem)
goto err;

- memcpy(&elem->st, &env->cur_state, sizeof(env->cur_state));
elem->insn_idx = insn_idx;
elem->prev_insn_idx = prev_insn_idx;
elem->next = env->head;
+ elem->st.speculative |= speculative;
env->head = elem;
env->stack_size++;
+ err = copy_verifier_state(&elem->st, cur);
+ if (err)
+ goto err;
if (env->stack_size > BPF_COMPLEXITY_LIMIT_STACK) {
verbose("BPF program is too complex\n");
goto err;
@@ -475,7 +569,7 @@ static struct bpf_verifier_state *push_stack(struct bpf_verifier_env *env,
return &elem->st;
err:
/* pop all elements and return */
- while (pop_stack(env, NULL) >= 0);
+ while (!pop_stack(env, NULL, NULL));
return NULL;
}

@@ -671,7 +765,7 @@ static void mark_reg_read(const struct bpf_verifier_state *state, u32 regno)
static int check_reg_arg(struct bpf_verifier_env *env, u32 regno,
enum reg_arg_type t)
{
- struct bpf_reg_state *regs = env->cur_state.regs;
+ struct bpf_reg_state *regs = env->cur_state->regs;

if (regno >= MAX_BPF_REG) {
verbose("R%d is invalid\n", regno);
@@ -684,7 +778,7 @@ static int check_reg_arg(struct bpf_verifier_env *env, u32 regno,
verbose("R%d !read_ok\n", regno);
return -EACCES;
}
- mark_reg_read(&env->cur_state, regno);
+ mark_reg_read(env->cur_state, regno);
} else {
/* check whether register used as dest operand can be written to */
if (regno == BPF_REG_FP) {
@@ -721,10 +815,21 @@ static int check_stack_write(struct bpf_verifier_env *env,
struct bpf_verifier_state *state, int off,
int size, int value_regno, int insn_idx)
{
- int i, spi = (MAX_BPF_STACK + off) / BPF_REG_SIZE;
+ int i, slot = -off - 1, spi = slot / BPF_REG_SIZE, err;
+
+ err = realloc_verifier_state(state, round_up(slot + 1, BPF_REG_SIZE),
+ true);
+ if (err)
+ return err;
/* caller checked that off % size == 0 and -MAX_BPF_STACK <= off < 0,
* so it's aligned access and [off, off + size) are within stack limits
*/
+ if (!env->allow_ptr_leaks &&
+ state->stack[spi].slot_type[0] == STACK_SPILL &&
+ size != BPF_REG_SIZE) {
+ verbose("attempt to corrupt spilled pointer on stack\n");
+ return -EACCES;
+ }

if (value_regno >= 0 &&
is_spillable_regtype(state->regs[value_regno].type)) {
@@ -736,11 +841,11 @@ static int check_stack_write(struct bpf_verifier_env *env,
}

/* save register state */
- state->spilled_regs[spi] = state->regs[value_regno];
- state->spilled_regs[spi].live |= REG_LIVE_WRITTEN;
+ state->stack[spi].spilled_ptr = state->regs[value_regno];
+ state->stack[spi].spilled_ptr.live |= REG_LIVE_WRITTEN;

for (i = 0; i < BPF_REG_SIZE; i++) {
- if (state->stack_slot_type[MAX_BPF_STACK + off + i] == STACK_MISC &&
+ if (state->stack[spi].slot_type[i] == STACK_MISC &&
!env->allow_ptr_leaks) {
int *poff = &env->insn_aux_data[insn_idx].sanitize_stack_off;
int soff = (-spi - 1) * BPF_REG_SIZE;
@@ -763,14 +868,15 @@ static int check_stack_write(struct bpf_verifier_env *env,
}
*poff = soff;
}
- state->stack_slot_type[MAX_BPF_STACK + off + i] = STACK_SPILL;
+ state->stack[spi].slot_type[i] = STACK_SPILL;
}
} else {
/* regular write of data into stack */
- state->spilled_regs[spi] = (struct bpf_reg_state) {};
+ state->stack[spi].spilled_ptr = (struct bpf_reg_state) {};

for (i = 0; i < size; i++)
- state->stack_slot_type[MAX_BPF_STACK + off + i] = STACK_MISC;
+ state->stack[spi].slot_type[(slot - i) % BPF_REG_SIZE] =
+ STACK_MISC;
}
return 0;
}
@@ -781,10 +887,10 @@ static void mark_stack_slot_read(const struct bpf_verifier_state *state, int slo

while (parent) {
/* if read wasn't screened by an earlier write ... */
- if (state->spilled_regs[slot].live & REG_LIVE_WRITTEN)
+ if (state->stack[slot].spilled_ptr.live & REG_LIVE_WRITTEN)
break;
/* ... then we depend on parent's value */
- parent->spilled_regs[slot].live |= REG_LIVE_READ;
+ parent->stack[slot].spilled_ptr.live |= REG_LIVE_READ;
state = parent;
parent = state->parent;
}
@@ -793,34 +899,37 @@ static void mark_stack_slot_read(const struct bpf_verifier_state *state, int slo
static int check_stack_read(struct bpf_verifier_state *state, int off, int size,
int value_regno)
{
- u8 *slot_type;
- int i, spi;
+ int i, slot = -off - 1, spi = slot / BPF_REG_SIZE;
+ u8 *stype;

- slot_type = &state->stack_slot_type[MAX_BPF_STACK + off];
+ if (state->allocated_stack <= slot) {
+ verbose("invalid read from stack off %d+0 size %d\n",
+ off, size);
+ return -EACCES;
+ }
+ stype = state->stack[spi].slot_type;

- if (slot_type[0] == STACK_SPILL) {
+ if (stype[0] == STACK_SPILL) {
if (size != BPF_REG_SIZE) {
verbose("invalid size of register spill\n");
return -EACCES;
}
for (i = 1; i < BPF_REG_SIZE; i++) {
- if (slot_type[i] != STACK_SPILL) {
+ if (stype[(slot - i) % BPF_REG_SIZE] != STACK_SPILL) {
verbose("corrupted spill memory\n");
return -EACCES;
}
}

- spi = (MAX_BPF_STACK + off) / BPF_REG_SIZE;
-
if (value_regno >= 0) {
/* restore register state from stack */
- state->regs[value_regno] = state->spilled_regs[spi];
+ state->regs[value_regno] = state->stack[spi].spilled_ptr;
mark_stack_slot_read(state, spi);
}
return 0;
} else {
for (i = 0; i < size; i++) {
- if (slot_type[i] != STACK_MISC) {
+ if (stype[(slot - i) % BPF_REG_SIZE] != STACK_MISC) {
verbose("invalid read from stack off %d+%d size %d\n",
off, i, size);
return -EACCES;
@@ -833,11 +942,37 @@ static int check_stack_read(struct bpf_verifier_state *state, int off, int size,
}
}

+static int check_stack_access(struct bpf_verifier_env *env,
+ const struct bpf_reg_state *reg,
+ int off, int size)
+{
+ /* Stack accesses must be at a fixed offset, so that we
+ * can determine what type of data were returned. See
+ * check_stack_read().
+ */
+ if (!tnum_is_const(reg->var_off)) {
+ char tn_buf[48];
+
+ tnum_strn(tn_buf, sizeof(tn_buf), reg->var_off);
+ verbose("variable stack access var_off=%s off=%d size=%d",
+ tn_buf, off, size);
+ return -EACCES;
+ }
+
+ if (off >= 0 || off < -MAX_BPF_STACK) {
+ verbose("invalid stack off=%d size=%d\n", off, size);
+ return -EACCES;
+ }
+
+ return 0;
+}
+
/* check read/write into map element returned by bpf_map_lookup_elem() */
static int __check_map_access(struct bpf_verifier_env *env, u32 regno, int off,
int size)
{
- struct bpf_map *map = env->cur_state.regs[regno].map_ptr;
+ struct bpf_reg_state *regs = cur_regs(env);
+ struct bpf_map *map = regs[regno].map_ptr;

if (off < 0 || size <= 0 || off + size > map->value_size) {
verbose("invalid access to map value, value_size=%d off=%d size=%d\n",
@@ -849,9 +984,9 @@ static int __check_map_access(struct bpf_verifier_env *env, u32 regno, int off,

/* check read/write into a map element with possible variable offset */
static int check_map_access(struct bpf_verifier_env *env, u32 regno,
- int off, int size)
+ int off, int size)
{
- struct bpf_verifier_state *state = &env->cur_state;
+ struct bpf_verifier_state *state = env->cur_state;
struct bpf_reg_state *reg = &state->regs[regno];
int err;

@@ -861,13 +996,17 @@ static int check_map_access(struct bpf_verifier_env *env, u32 regno,
*/
if (log_level)
print_verifier_state(state);
+
/* The minimum value is only important with signed
* comparisons where we can't assume the floor of a
* value is 0. If we are using signed variables for our
* index'es we need to make sure that whatever we use
* will have a set floor within our range.
*/
- if (reg->smin_value < 0) {
+ if (reg->smin_value < 0 &&
+ (reg->smin_value == S64_MIN ||
+ (off + reg->smin_value != (s64)(s32)(off + reg->smin_value)) ||
+ reg->smin_value + off < 0)) {
verbose("R%d min value is negative, either use unsigned index or do a if (index >=0) check.\n",
regno);
return -EACCES;
@@ -924,7 +1063,7 @@ static bool may_access_direct_pkt_data(struct bpf_verifier_env *env,
static int __check_packet_access(struct bpf_verifier_env *env, u32 regno,
int off, int size)
{
- struct bpf_reg_state *regs = env->cur_state.regs;
+ struct bpf_reg_state *regs = cur_regs(env);
struct bpf_reg_state *reg = &regs[regno];

if (off < 0 || size <= 0 || (u64)off + size > reg->range) {
@@ -938,7 +1077,7 @@ static int __check_packet_access(struct bpf_verifier_env *env, u32 regno,
static int check_packet_access(struct bpf_verifier_env *env, u32 regno, int off,
int size)
{
- struct bpf_reg_state *regs = env->cur_state.regs;
+ struct bpf_reg_state *regs = cur_regs(env);
struct bpf_reg_state *reg = &regs[regno];
int err;

@@ -1008,19 +1147,19 @@ static bool __is_pointer_value(bool allow_ptr_leaks,

static bool is_pointer_value(struct bpf_verifier_env *env, int regno)
{
- return __is_pointer_value(env->allow_ptr_leaks, &env->cur_state.regs[regno]);
+ return __is_pointer_value(env->allow_ptr_leaks, cur_regs(env) + regno);
}

static bool is_ctx_reg(struct bpf_verifier_env *env, int regno)
{
- const struct bpf_reg_state *reg = &env->cur_state.regs[regno];
+ const struct bpf_reg_state *reg = cur_regs(env) + regno;

return reg->type == PTR_TO_CTX;
}

static bool is_pkt_reg(struct bpf_verifier_env *env, int regno)
{
- const struct bpf_reg_state *reg = &env->cur_state.regs[regno];
+ const struct bpf_reg_state *reg = cur_regs(env) + regno;

return reg->type == PTR_TO_PACKET;
}
@@ -1145,8 +1284,9 @@ static int check_mem_access(struct bpf_verifier_env *env, int insn_idx, u32 regn
int off, int bpf_size, enum bpf_access_type t,
int value_regno, bool strict_alignment_once)
{
- struct bpf_verifier_state *state = &env->cur_state;
- struct bpf_reg_state *reg = &state->regs[regno];
+ struct bpf_verifier_state *state = env->cur_state;
+ struct bpf_reg_state *regs = cur_regs(env);
+ struct bpf_reg_state *reg = regs + regno;
int size, err = 0;

size = bpf_size_to_bytes(bpf_size);
@@ -1170,7 +1310,7 @@ static int check_mem_access(struct bpf_verifier_env *env, int insn_idx, u32 regn

err = check_map_access(env, regno, off, size);
if (!err && t == BPF_READ && value_regno >= 0)
- mark_reg_unknown(state->regs, value_regno);
+ mark_reg_unknown(regs, value_regno);

} else if (reg->type == PTR_TO_CTX) {
enum bpf_reg_type reg_type = SCALAR_VALUE;
@@ -1203,49 +1343,29 @@ static int check_mem_access(struct bpf_verifier_env *env, int insn_idx, u32 regn
* the offset is zero.
*/
if (reg_type == SCALAR_VALUE)
- mark_reg_unknown(state->regs, value_regno);
+ mark_reg_unknown(regs, value_regno);
else
- mark_reg_known_zero(state->regs, value_regno);
- state->regs[value_regno].id = 0;
- state->regs[value_regno].off = 0;
- state->regs[value_regno].range = 0;
- state->regs[value_regno].type = reg_type;
+ mark_reg_known_zero(regs, value_regno);
+ regs[value_regno].id = 0;
+ regs[value_regno].off = 0;
+ regs[value_regno].range = 0;
+ regs[value_regno].type = reg_type;
}

} else if (reg->type == PTR_TO_STACK) {
- /* stack accesses must be at a fixed offset, so that we can
- * determine what type of data were returned.
- * See check_stack_read().
- */
- if (!tnum_is_const(reg->var_off)) {
- char tn_buf[48];
-
- tnum_strn(tn_buf, sizeof(tn_buf), reg->var_off);
- verbose("variable stack access var_off=%s off=%d size=%d",
- tn_buf, off, size);
- return -EACCES;
- }
off += reg->var_off.value;
- if (off >= 0 || off < -MAX_BPF_STACK) {
- verbose("invalid stack off=%d size=%d\n", off, size);
- return -EACCES;
- }
+ err = check_stack_access(env, reg, off, size);
+ if (err)
+ return err;

if (env->prog->aux->stack_depth < -off)
env->prog->aux->stack_depth = -off;

- if (t == BPF_WRITE) {
- if (!env->allow_ptr_leaks &&
- state->stack_slot_type[MAX_BPF_STACK + off] == STACK_SPILL &&
- size != BPF_REG_SIZE) {
- verbose("attempt to corrupt spilled pointer on stack\n");
- return -EACCES;
- }
+ if (t == BPF_WRITE)
err = check_stack_write(env, state, off, size,
value_regno, insn_idx);
- } else {
+ else
err = check_stack_read(state, off, size, value_regno);
- }
} else if (reg->type == PTR_TO_PACKET) {
if (t == BPF_WRITE && !may_access_direct_pkt_data(env, NULL, t)) {
verbose("cannot write into packet\n");
@@ -1258,7 +1378,7 @@ static int check_mem_access(struct bpf_verifier_env *env, int insn_idx, u32 regn
}
err = check_packet_access(env, regno, off, size);
if (!err && t == BPF_READ && value_regno >= 0)
- mark_reg_unknown(state->regs, value_regno);
+ mark_reg_unknown(regs, value_regno);
} else {
verbose("R%d invalid mem access '%s'\n",
regno, reg_type_str[reg->type]);
@@ -1266,9 +1386,9 @@ static int check_mem_access(struct bpf_verifier_env *env, int insn_idx, u32 regn
}

if (!err && size < BPF_REG_SIZE && value_regno >= 0 && t == BPF_READ &&
- state->regs[value_regno].type == SCALAR_VALUE) {
+ regs[value_regno].type == SCALAR_VALUE) {
/* b/h/w load zero-extends, mark upper bits as known 0 */
- coerce_reg_to_size(&state->regs[value_regno], size);
+ coerce_reg_to_size(&regs[value_regno], size);
}
return err;
}
@@ -1333,9 +1453,9 @@ static int check_stack_boundary(struct bpf_verifier_env *env, int regno,
int access_size, bool zero_size_allowed,
struct bpf_call_arg_meta *meta)
{
- struct bpf_verifier_state *state = &env->cur_state;
+ struct bpf_verifier_state *state = env->cur_state;
struct bpf_reg_state *regs = state->regs;
- int off, i;
+ int off, i, slot, spi;

if (regs[regno].type != PTR_TO_STACK) {
/* Allow zero-byte read from NULL, regardless of pointer type */
@@ -1376,7 +1496,11 @@ static int check_stack_boundary(struct bpf_verifier_env *env, int regno,
}

for (i = 0; i < access_size; i++) {
- if (state->stack_slot_type[MAX_BPF_STACK + off + i] != STACK_MISC) {
+ slot = -(off + i) - 1;
+ spi = slot / BPF_REG_SIZE;
+ if (state->allocated_stack <= slot ||
+ state->stack[spi].slot_type[slot % BPF_REG_SIZE] !=
+ STACK_MISC) {
verbose("invalid indirect read from stack off %d+%d size %d\n",
off, i, access_size);
return -EACCES;
@@ -1389,7 +1513,7 @@ static int check_helper_mem_access(struct bpf_verifier_env *env, int regno,
int access_size, bool zero_size_allowed,
struct bpf_call_arg_meta *meta)
{
- struct bpf_reg_state *regs = env->cur_state.regs, *reg = &regs[regno];
+ struct bpf_reg_state *regs = cur_regs(env), *reg = &regs[regno];

switch (reg->type) {
case PTR_TO_PACKET:
@@ -1406,7 +1530,7 @@ static int check_func_arg(struct bpf_verifier_env *env, u32 regno,
enum bpf_arg_type arg_type,
struct bpf_call_arg_meta *meta)
{
- struct bpf_reg_state *regs = env->cur_state.regs, *reg = &regs[regno];
+ struct bpf_reg_state *regs = cur_regs(env), *reg = &regs[regno];
enum bpf_reg_type expected_type, type = reg->type;
int err = 0;

@@ -1678,7 +1802,7 @@ static int check_raw_mode(const struct bpf_func_proto *fn)
*/
static void clear_all_pkt_pointers(struct bpf_verifier_env *env)
{
- struct bpf_verifier_state *state = &env->cur_state;
+ struct bpf_verifier_state *state = env->cur_state;
struct bpf_reg_state *regs = state->regs, *reg;
int i;

@@ -1687,10 +1811,10 @@ static void clear_all_pkt_pointers(struct bpf_verifier_env *env)
regs[i].type == PTR_TO_PACKET_END)
mark_reg_unknown(regs, i);

- for (i = 0; i < MAX_BPF_STACK; i += BPF_REG_SIZE) {
- if (state->stack_slot_type[i] != STACK_SPILL)
+ for (i = 0; i < state->allocated_stack / BPF_REG_SIZE; i++) {
+ if (state->stack[i].slot_type[0] != STACK_SPILL)
continue;
- reg = &state->spilled_regs[i / BPF_REG_SIZE];
+ reg = &state->stack[i].spilled_ptr;
if (reg->type != PTR_TO_PACKET &&
reg->type != PTR_TO_PACKET_END)
continue;
@@ -1700,9 +1824,8 @@ static void clear_all_pkt_pointers(struct bpf_verifier_env *env)

static int check_call(struct bpf_verifier_env *env, int func_id, int insn_idx)
{
- struct bpf_verifier_state *state = &env->cur_state;
const struct bpf_func_proto *fn = NULL;
- struct bpf_reg_state *regs = state->regs;
+ struct bpf_reg_state *regs;
struct bpf_call_arg_meta meta;
bool changes_data;
int i, err;
@@ -1776,6 +1899,7 @@ static int check_call(struct bpf_verifier_env *env, int func_id, int insn_idx)
return err;
}

+ regs = cur_regs(env);
/* reset caller saved regs */
for (i = 0; i < CALLER_SAVED_REGS; i++) {
mark_reg_not_init(regs, caller_saved[i]);
@@ -1880,6 +2004,125 @@ static bool check_reg_sane_offset(struct bpf_verifier_env *env,
return true;
}

+static struct bpf_insn_aux_data *cur_aux(struct bpf_verifier_env *env)
+{
+ return &env->insn_aux_data[env->insn_idx];
+}
+
+static int retrieve_ptr_limit(const struct bpf_reg_state *ptr_reg,
+ u32 *ptr_limit, u8 opcode, bool off_is_neg)
+{
+ bool mask_to_left = (opcode == BPF_ADD && off_is_neg) ||
+ (opcode == BPF_SUB && !off_is_neg);
+ u32 off;
+
+ switch (ptr_reg->type) {
+ case PTR_TO_STACK:
+ off = ptr_reg->off + ptr_reg->var_off.value;
+ if (mask_to_left)
+ *ptr_limit = MAX_BPF_STACK + off;
+ else
+ *ptr_limit = -off;
+ return 0;
+ case PTR_TO_MAP_VALUE:
+ if (mask_to_left) {
+ *ptr_limit = ptr_reg->umax_value + ptr_reg->off;
+ } else {
+ off = ptr_reg->smin_value + ptr_reg->off;
+ *ptr_limit = ptr_reg->map_ptr->value_size - off;
+ }
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static bool can_skip_alu_sanitation(const struct bpf_verifier_env *env,
+ const struct bpf_insn *insn)
+{
+ return env->allow_ptr_leaks || BPF_SRC(insn->code) == BPF_K;
+}
+
+static int update_alu_sanitation_state(struct bpf_insn_aux_data *aux,
+ u32 alu_state, u32 alu_limit)
+{
+ /* If we arrived here from different branches with different
+ * state or limits to sanitize, then this won't work.
+ */
+ if (aux->alu_state &&
+ (aux->alu_state != alu_state ||
+ aux->alu_limit != alu_limit))
+ return -EACCES;
+
+ /* Corresponding fixup done in fixup_bpf_calls(). */
+ aux->alu_state = alu_state;
+ aux->alu_limit = alu_limit;
+ return 0;
+}
+
+static int sanitize_val_alu(struct bpf_verifier_env *env,
+ struct bpf_insn *insn)
+{
+ struct bpf_insn_aux_data *aux = cur_aux(env);
+
+ if (can_skip_alu_sanitation(env, insn))
+ return 0;
+
+ return update_alu_sanitation_state(aux, BPF_ALU_NON_POINTER, 0);
+}
+
+static int sanitize_ptr_alu(struct bpf_verifier_env *env,
+ struct bpf_insn *insn,
+ const struct bpf_reg_state *ptr_reg,
+ struct bpf_reg_state *dst_reg,
+ bool off_is_neg)
+{
+ struct bpf_verifier_state *vstate = env->cur_state;
+ struct bpf_insn_aux_data *aux = cur_aux(env);
+ bool ptr_is_dst_reg = ptr_reg == dst_reg;
+ u8 opcode = BPF_OP(insn->code);
+ u32 alu_state, alu_limit;
+ struct bpf_reg_state tmp;
+ bool ret;
+
+ if (can_skip_alu_sanitation(env, insn))
+ return 0;
+
+ /* We already marked aux for masking from non-speculative
+ * paths, thus we got here in the first place. We only care
+ * to explore bad access from here.
+ */
+ if (vstate->speculative)
+ goto do_sim;
+
+ alu_state = off_is_neg ? BPF_ALU_NEG_VALUE : 0;
+ alu_state |= ptr_is_dst_reg ?
+ BPF_ALU_SANITIZE_SRC : BPF_ALU_SANITIZE_DST;
+
+ if (retrieve_ptr_limit(ptr_reg, &alu_limit, opcode, off_is_neg))
+ return 0;
+ if (update_alu_sanitation_state(aux, alu_state, alu_limit))
+ return -EACCES;
+do_sim:
+ /* Simulate and find potential out-of-bounds access under
+ * speculative execution from truncation as a result of
+ * masking when off was not within expected range. If off
+ * sits in dst, then we temporarily need to move ptr there
+ * to simulate dst (== 0) +/-= ptr. Needed, for example,
+ * for cases where we use K-based arithmetic in one direction
+ * and truncated reg-based in the other in order to explore
+ * bad access.
+ */
+ if (!ptr_is_dst_reg) {
+ tmp = *dst_reg;
+ *dst_reg = *ptr_reg;
+ }
+ ret = push_stack(env, env->insn_idx + 1, env->insn_idx, true);
+ if (!ptr_is_dst_reg && ret)
+ *dst_reg = tmp;
+ return !ret ? -EFAULT : 0;
+}
+
/* Handles arithmetic on a pointer and a scalar: computes new min/max and var_off.
* Caller should also handle BPF_MOV case separately.
* If we return -EACCES, caller may want to try again treating pointer as a
@@ -1890,14 +2133,15 @@ static int adjust_ptr_min_max_vals(struct bpf_verifier_env *env,
const struct bpf_reg_state *ptr_reg,
const struct bpf_reg_state *off_reg)
{
- struct bpf_reg_state *regs = env->cur_state.regs, *dst_reg;
+ struct bpf_reg_state *regs = cur_regs(env), *dst_reg;
bool known = tnum_is_const(off_reg->var_off);
s64 smin_val = off_reg->smin_value, smax_val = off_reg->smax_value,
smin_ptr = ptr_reg->smin_value, smax_ptr = ptr_reg->smax_value;
u64 umin_val = off_reg->umin_value, umax_val = off_reg->umax_value,
umin_ptr = ptr_reg->umin_value, umax_ptr = ptr_reg->umax_value;
+ u32 dst = insn->dst_reg, src = insn->src_reg;
u8 opcode = BPF_OP(insn->code);
- u32 dst = insn->dst_reg;
+ int ret;

dst_reg = &regs[dst];

@@ -1949,6 +2193,11 @@ static int adjust_ptr_min_max_vals(struct bpf_verifier_env *env,

switch (opcode) {
case BPF_ADD:
+ ret = sanitize_ptr_alu(env, insn, ptr_reg, dst_reg, smin_val < 0);
+ if (ret < 0) {
+ verbose("R%d tried to add from different maps or paths\n", dst);
+ return ret;
+ }
/* We can take a fixed offset as long as it doesn't overflow
* the s32 'off' field
*/
@@ -1999,6 +2248,11 @@ static int adjust_ptr_min_max_vals(struct bpf_verifier_env *env,
}
break;
case BPF_SUB:
+ ret = sanitize_ptr_alu(env, insn, ptr_reg, dst_reg, smin_val < 0);
+ if (ret < 0) {
+ verbose("R%d tried to sub from different maps or paths\n", dst);
+ return ret;
+ }
if (dst_reg == off_reg) {
/* scalar -= pointer. Creates an unknown scalar */
if (!env->allow_ptr_leaks)
@@ -2071,6 +2325,13 @@ static int adjust_ptr_min_max_vals(struct bpf_verifier_env *env,
verbose("R%d bitwise operator %s on pointer prohibited\n",
dst, bpf_alu_string[opcode >> 4]);
return -EACCES;
+ case PTR_TO_MAP_VALUE:
+ if (!env->allow_ptr_leaks && !known && (smin_val < 0) != (smax_val < 0)) {
+ verbose("R%d has unknown scalar with mixed signed bounds, pointer arithmetic with it prohibited for !root\n",
+ off_reg == dst_reg ? dst : src);
+ return -EACCES;
+ }
+ /* fall-through */
default:
/* other operators (e.g. MUL,LSH) produce non-pointer results */
if (!env->allow_ptr_leaks)
@@ -2085,6 +2346,25 @@ static int adjust_ptr_min_max_vals(struct bpf_verifier_env *env,
__update_reg_bounds(dst_reg);
__reg_deduce_bounds(dst_reg);
__reg_bound_offset(dst_reg);
+
+ /* For unprivileged we require that resulting offset must be in bounds
+ * in order to be able to sanitize access later on.
+ */
+ if (!env->allow_ptr_leaks) {
+ if (dst_reg->type == PTR_TO_MAP_VALUE &&
+ check_map_access(env, dst, dst_reg->off, 1)) {
+ verbose("R%d pointer arithmetic of map value goes out of range, "
+ "prohibited for !root\n", dst);
+ return -EACCES;
+ } else if (dst_reg->type == PTR_TO_STACK &&
+ check_stack_access(env, dst_reg, dst_reg->off +
+ dst_reg->var_off.value, 1)) {
+ verbose("R%d stack pointer arithmetic goes out of range, "
+ "prohibited for !root\n", dst);
+ return -EACCES;
+ }
+ }
+
return 0;
}

@@ -2097,12 +2377,14 @@ static int adjust_scalar_min_max_vals(struct bpf_verifier_env *env,
struct bpf_reg_state *dst_reg,
struct bpf_reg_state src_reg)
{
- struct bpf_reg_state *regs = env->cur_state.regs;
+ struct bpf_reg_state *regs = cur_regs(env);
u8 opcode = BPF_OP(insn->code);
bool src_known, dst_known;
s64 smin_val, smax_val;
u64 umin_val, umax_val;
u64 insn_bitness = (BPF_CLASS(insn->code) == BPF_ALU64) ? 64 : 32;
+ u32 dst = insn->dst_reg;
+ int ret;

if (insn_bitness == 32) {
/* Relevant for 32-bit RSH: Information can propagate towards
@@ -2137,6 +2419,11 @@ static int adjust_scalar_min_max_vals(struct bpf_verifier_env *env,

switch (opcode) {
case BPF_ADD:
+ ret = sanitize_val_alu(env, insn);
+ if (ret < 0) {
+ verbose("R%d tried to add from different pointers or scalars\n", dst);
+ return ret;
+ }
if (signed_add_overflows(dst_reg->smin_value, smin_val) ||
signed_add_overflows(dst_reg->smax_value, smax_val)) {
dst_reg->smin_value = S64_MIN;
@@ -2156,6 +2443,11 @@ static int adjust_scalar_min_max_vals(struct bpf_verifier_env *env,
dst_reg->var_off = tnum_add(dst_reg->var_off, src_reg.var_off);
break;
case BPF_SUB:
+ ret = sanitize_val_alu(env, insn);
+ if (ret < 0) {
+ verbose("R%d tried to sub from different pointers or scalars\n", dst);
+ return ret;
+ }
if (signed_sub_overflows(dst_reg->smin_value, smax_val) ||
signed_sub_overflows(dst_reg->smax_value, smin_val)) {
/* Overflow possible, we know nothing */
@@ -2345,7 +2637,7 @@ static int adjust_scalar_min_max_vals(struct bpf_verifier_env *env,
static int adjust_reg_min_max_vals(struct bpf_verifier_env *env,
struct bpf_insn *insn)
{
- struct bpf_reg_state *regs = env->cur_state.regs, *dst_reg, *src_reg;
+ struct bpf_reg_state *regs = cur_regs(env), *dst_reg, *src_reg;
struct bpf_reg_state *ptr_reg = NULL, off_reg = {0};
u8 opcode = BPF_OP(insn->code);
int rc;
@@ -2419,12 +2711,12 @@ static int adjust_reg_min_max_vals(struct bpf_verifier_env *env,

/* Got here implies adding two SCALAR_VALUEs */
if (WARN_ON_ONCE(ptr_reg)) {
- print_verifier_state(&env->cur_state);
+ print_verifier_state(env->cur_state);
verbose("verifier internal error: unexpected ptr_reg\n");
return -EINVAL;
}
if (WARN_ON(!src_reg)) {
- print_verifier_state(&env->cur_state);
+ print_verifier_state(env->cur_state);
verbose("verifier internal error: no src_reg\n");
return -EINVAL;
}
@@ -2434,7 +2726,7 @@ static int adjust_reg_min_max_vals(struct bpf_verifier_env *env,
/* check validity of 32-bit and 64-bit arithmetic operations */
static int check_alu_op(struct bpf_verifier_env *env, struct bpf_insn *insn)
{
- struct bpf_reg_state *regs = env->cur_state.regs;
+ struct bpf_reg_state *regs = cur_regs(env);
u8 opcode = BPF_OP(insn->code);
int err;

@@ -2661,10 +2953,10 @@ static void find_good_pkt_pointers(struct bpf_verifier_state *state,
/* keep the maximum range already checked */
regs[i].range = max(regs[i].range, new_range);

- for (i = 0; i < MAX_BPF_STACK; i += BPF_REG_SIZE) {
- if (state->stack_slot_type[i] != STACK_SPILL)
+ for (i = 0; i < state->allocated_stack / BPF_REG_SIZE; i++) {
+ if (state->stack[i].slot_type[0] != STACK_SPILL)
continue;
- reg = &state->spilled_regs[i / BPF_REG_SIZE];
+ reg = &state->stack[i].spilled_ptr;
if (reg->type == PTR_TO_PACKET && reg->id == dst_reg->id)
reg->range = max(reg->range, new_range);
}
@@ -2914,17 +3206,17 @@ static void mark_map_regs(struct bpf_verifier_state *state, u32 regno,
for (i = 0; i < MAX_BPF_REG; i++)
mark_map_reg(regs, i, id, is_null);

- for (i = 0; i < MAX_BPF_STACK; i += BPF_REG_SIZE) {
- if (state->stack_slot_type[i] != STACK_SPILL)
+ for (i = 0; i < state->allocated_stack / BPF_REG_SIZE; i++) {
+ if (state->stack[i].slot_type[0] != STACK_SPILL)
continue;
- mark_map_reg(state->spilled_regs, i / BPF_REG_SIZE, id, is_null);
+ mark_map_reg(&state->stack[i].spilled_ptr, 0, id, is_null);
}
}

static int check_cond_jmp_op(struct bpf_verifier_env *env,
struct bpf_insn *insn, int *insn_idx)
{
- struct bpf_verifier_state *other_branch, *this_branch = &env->cur_state;
+ struct bpf_verifier_state *other_branch, *this_branch = env->cur_state;
struct bpf_reg_state *regs = this_branch->regs, *dst_reg;
u8 opcode = BPF_OP(insn->code);
int err;
@@ -2984,7 +3276,8 @@ static int check_cond_jmp_op(struct bpf_verifier_env *env,
}
}

- other_branch = push_stack(env, *insn_idx + insn->off + 1, *insn_idx);
+ other_branch = push_stack(env, *insn_idx + insn->off + 1, *insn_idx,
+ false);
if (!other_branch)
return -EFAULT;

@@ -3087,7 +3380,7 @@ static struct bpf_map *ld_imm64_to_map_ptr(struct bpf_insn *insn)
/* verify BPF_LD_IMM64 instruction */
static int check_ld_imm(struct bpf_verifier_env *env, struct bpf_insn *insn)
{
- struct bpf_reg_state *regs = env->cur_state.regs;
+ struct bpf_reg_state *regs = cur_regs(env);
int err;

if (BPF_SIZE(insn->code) != BPF_DW) {
@@ -3148,7 +3441,7 @@ static bool may_access_skb(enum bpf_prog_type type)
*/
static int check_ld_abs(struct bpf_verifier_env *env, struct bpf_insn *insn)
{
- struct bpf_reg_state *regs = env->cur_state.regs;
+ struct bpf_reg_state *regs = cur_regs(env);
u8 mode = BPF_MODE(insn->code);
int i, err;

@@ -3534,6 +3827,57 @@ static bool regsafe(struct bpf_reg_state *rold, struct bpf_reg_state *rcur,
return false;
}

+static bool stacksafe(struct bpf_verifier_state *old,
+ struct bpf_verifier_state *cur,
+ struct idpair *idmap)
+{
+ int i, spi;
+
+ /* if explored stack has more populated slots than current stack
+ * such stacks are not equivalent
+ */
+ if (old->allocated_stack > cur->allocated_stack)
+ return false;
+
+ /* walk slots of the explored stack and ignore any additional
+ * slots in the current stack, since explored(safe) state
+ * didn't use them
+ */
+ for (i = 0; i < old->allocated_stack; i++) {
+ spi = i / BPF_REG_SIZE;
+
+ if (old->stack[spi].slot_type[i % BPF_REG_SIZE] == STACK_INVALID)
+ continue;
+ if (old->stack[spi].slot_type[i % BPF_REG_SIZE] !=
+ cur->stack[spi].slot_type[i % BPF_REG_SIZE])
+ /* Ex: old explored (safe) state has STACK_SPILL in
+ * this stack slot, but current has has STACK_MISC ->
+ * this verifier states are not equivalent,
+ * return false to continue verification of this path
+ */
+ return false;
+ if (i % BPF_REG_SIZE)
+ continue;
+ if (old->stack[spi].slot_type[0] != STACK_SPILL)
+ continue;
+ if (!regsafe(&old->stack[spi].spilled_ptr,
+ &cur->stack[spi].spilled_ptr,
+ idmap))
+ /* when explored and current stack slot are both storing
+ * spilled registers, check that stored pointers types
+ * are the same as well.
+ * Ex: explored safe path could have stored
+ * (bpf_reg_state) {.type = PTR_TO_STACK, .off = -8}
+ * but current path has stored:
+ * (bpf_reg_state) {.type = PTR_TO_STACK, .off = -16}
+ * such verifier states are not equivalent.
+ * return false to continue verification of this path
+ */
+ return false;
+ }
+ return true;
+}
+
/* compare two verifier states
*
* all states stored in state_list are known to be valid, since
@@ -3568,6 +3912,12 @@ static bool states_equal(struct bpf_verifier_env *env,
bool ret = false;
int i;

+ /* Verification state from speculative execution simulation
+ * must never prune a non-speculative execution one.
+ */
+ if (old->speculative && !cur->speculative)
+ return false;
+
idmap = kcalloc(ID_MAP_SIZE, sizeof(struct idpair), GFP_KERNEL);
/* If we failed to allocate the idmap, just say it's not safe */
if (!idmap)
@@ -3578,37 +3928,8 @@ static bool states_equal(struct bpf_verifier_env *env,
goto out_free;
}

- for (i = 0; i < MAX_BPF_STACK; i++) {
- if (old->stack_slot_type[i] == STACK_INVALID)
- continue;
- if (old->stack_slot_type[i] != cur->stack_slot_type[i])
- /* Ex: old explored (safe) state has STACK_SPILL in
- * this stack slot, but current has has STACK_MISC ->
- * this verifier states are not equivalent,
- * return false to continue verification of this path
- */
- goto out_free;
- if (i % BPF_REG_SIZE)
- continue;
- if (old->stack_slot_type[i] != STACK_SPILL)
- continue;
- if (!regsafe(&old->spilled_regs[i / BPF_REG_SIZE],
- &cur->spilled_regs[i / BPF_REG_SIZE],
- idmap))
- /* when explored and current stack slot are both storing
- * spilled registers, check that stored pointers types
- * are the same as well.
- * Ex: explored safe path could have stored
- * (bpf_reg_state) {.type = PTR_TO_STACK, .off = -8}
- * but current path has stored:
- * (bpf_reg_state) {.type = PTR_TO_STACK, .off = -16}
- * such verifier states are not equivalent.
- * return false to continue verification of this path
- */
- goto out_free;
- else
- continue;
- }
+ if (!stacksafe(old, cur, idmap))
+ goto out_free;
ret = true;
out_free:
kfree(idmap);
@@ -3644,17 +3965,19 @@ static bool do_propagate_liveness(const struct bpf_verifier_state *state,
}
}
/* ... and stack slots */
- for (i = 0; i < MAX_BPF_STACK / BPF_REG_SIZE; i++) {
- if (parent->stack_slot_type[i * BPF_REG_SIZE] != STACK_SPILL)
+ for (i = 0; i < state->allocated_stack / BPF_REG_SIZE &&
+ i < parent->allocated_stack / BPF_REG_SIZE; i++) {
+ if (parent->stack[i].slot_type[0] != STACK_SPILL)
continue;
- if (state->stack_slot_type[i * BPF_REG_SIZE] != STACK_SPILL)
+ if (state->stack[i].slot_type[0] != STACK_SPILL)
continue;
- if (parent->spilled_regs[i].live & REG_LIVE_READ)
+ if (parent->stack[i].spilled_ptr.live & REG_LIVE_READ)
continue;
- if (writes && (state->spilled_regs[i].live & REG_LIVE_WRITTEN))
+ if (writes &&
+ (state->stack[i].spilled_ptr.live & REG_LIVE_WRITTEN))
continue;
- if (state->spilled_regs[i].live & REG_LIVE_READ) {
- parent->spilled_regs[i].live |= REG_LIVE_READ;
+ if (state->stack[i].spilled_ptr.live & REG_LIVE_READ) {
+ parent->stack[i].spilled_ptr.live |= REG_LIVE_READ;
touched = true;
}
}
@@ -3684,7 +4007,8 @@ static int is_state_visited(struct bpf_verifier_env *env, int insn_idx)
{
struct bpf_verifier_state_list *new_sl;
struct bpf_verifier_state_list *sl;
- int i;
+ struct bpf_verifier_state *cur = env->cur_state;
+ int i, err;

sl = env->explored_states[insn_idx];
if (!sl)
@@ -3694,7 +4018,7 @@ static int is_state_visited(struct bpf_verifier_env *env, int insn_idx)
return 0;

while (sl != STATE_LIST_MARK) {
- if (states_equal(env, &sl->state, &env->cur_state)) {
+ if (states_equal(env, &sl->state, cur)) {
/* reached equivalent register/stack state,
* prune the search.
* Registers read by the continuation are read by us.
@@ -3705,7 +4029,7 @@ static int is_state_visited(struct bpf_verifier_env *env, int insn_idx)
* they'll be immediately forgotten as we're pruning
* this state and will pop a new one.
*/
- propagate_liveness(&sl->state, &env->cur_state);
+ propagate_liveness(&sl->state, cur);
return 1;
}
sl = sl->next;
@@ -3717,16 +4041,21 @@ static int is_state_visited(struct bpf_verifier_env *env, int insn_idx)
* it will be rejected. Since there are no loops, we won't be
* seeing this 'insn_idx' instruction again on the way to bpf_exit
*/
- new_sl = kmalloc(sizeof(struct bpf_verifier_state_list), GFP_USER);
+ new_sl = kzalloc(sizeof(struct bpf_verifier_state_list), GFP_KERNEL);
if (!new_sl)
return -ENOMEM;

/* add new state to the head of linked list */
- memcpy(&new_sl->state, &env->cur_state, sizeof(env->cur_state));
+ err = copy_verifier_state(&new_sl->state, cur);
+ if (err) {
+ free_verifier_state(&new_sl->state, false);
+ kfree(new_sl);
+ return err;
+ }
new_sl->next = env->explored_states[insn_idx];
env->explored_states[insn_idx] = new_sl;
/* connect new state to parentage chain */
- env->cur_state.parent = &new_sl->state;
+ cur->parent = &new_sl->state;
/* clear write marks in current state: the writes we did are not writes
* our child did, so they don't screen off its reads from us.
* (There are no read marks in current state, because reads always mark
@@ -3734,10 +4063,10 @@ static int is_state_visited(struct bpf_verifier_env *env, int insn_idx)
* explored_states can get read marks.)
*/
for (i = 0; i < BPF_REG_FP; i++)
- env->cur_state.regs[i].live = REG_LIVE_NONE;
- for (i = 0; i < MAX_BPF_STACK / BPF_REG_SIZE; i++)
- if (env->cur_state.stack_slot_type[i * BPF_REG_SIZE] == STACK_SPILL)
- env->cur_state.spilled_regs[i].live = REG_LIVE_NONE;
+ cur->regs[i].live = REG_LIVE_NONE;
+ for (i = 0; i < cur->allocated_stack / BPF_REG_SIZE; i++)
+ if (cur->stack[i].slot_type[0] == STACK_SPILL)
+ cur->stack[i].spilled_ptr.live = REG_LIVE_NONE;
return 0;
}

@@ -3752,29 +4081,31 @@ static int ext_analyzer_insn_hook(struct bpf_verifier_env *env,

static int do_check(struct bpf_verifier_env *env)
{
- struct bpf_verifier_state *state = &env->cur_state;
+ struct bpf_verifier_state *state;
struct bpf_insn *insns = env->prog->insnsi;
- struct bpf_reg_state *regs = state->regs;
+ struct bpf_reg_state *regs;
int insn_cnt = env->prog->len;
- int insn_idx, prev_insn_idx = 0;
int insn_processed = 0;
bool do_print_state = false;

- init_reg_state(regs);
+ state = kzalloc(sizeof(struct bpf_verifier_state), GFP_KERNEL);
+ if (!state)
+ return -ENOMEM;
+ env->cur_state = state;
+ init_reg_state(state->regs);
state->parent = NULL;
- insn_idx = 0;
for (;;) {
struct bpf_insn *insn;
u8 class;
int err;

- if (insn_idx >= insn_cnt) {
+ if (env->insn_idx >= insn_cnt) {
verbose("invalid insn idx %d insn_cnt %d\n",
- insn_idx, insn_cnt);
+ env->insn_idx, insn_cnt);
return -EFAULT;
}

- insn = &insns[insn_idx];
+ insn = &insns[env->insn_idx];
class = BPF_CLASS(insn->code);

if (++insn_processed > BPF_COMPLEXITY_LIMIT_INSNS) {
@@ -3783,17 +4114,19 @@ static int do_check(struct bpf_verifier_env *env)
return -E2BIG;
}

- err = is_state_visited(env, insn_idx);
+ err = is_state_visited(env, env->insn_idx);
if (err < 0)
return err;
if (err == 1) {
/* found equivalent state, can prune the search */
if (log_level) {
if (do_print_state)
- verbose("\nfrom %d to %d: safe\n",
- prev_insn_idx, insn_idx);
+ verbose("\nfrom %d to %d%s: safe\n",
+ env->prev_insn_idx, env->insn_idx,
+ env->cur_state->speculative ?
+ " (speculative execution)" : "");
else
- verbose("%d: safe\n", insn_idx);
+ verbose("%d: safe\n", env->insn_idx);
}
goto process_bpf_exit;
}
@@ -3803,24 +4136,27 @@ static int do_check(struct bpf_verifier_env *env)

if (log_level > 1 || (log_level && do_print_state)) {
if (log_level > 1)
- verbose("%d:", insn_idx);
+ verbose("%d:", env->insn_idx);
else
- verbose("\nfrom %d to %d:",
- prev_insn_idx, insn_idx);
- print_verifier_state(&env->cur_state);
+ verbose("\nfrom %d to %d%s:",
+ env->prev_insn_idx, env->insn_idx,
+ env->cur_state->speculative ?
+ " (speculative execution)" : "");
+ print_verifier_state(env->cur_state);
do_print_state = false;
}

if (log_level) {
- verbose("%d: ", insn_idx);
+ verbose("%d: ", env->insn_idx);
print_bpf_insn(env, insn);
}

- err = ext_analyzer_insn_hook(env, insn_idx, prev_insn_idx);
+ err = ext_analyzer_insn_hook(env, env->insn_idx, env->prev_insn_idx);
if (err)
return err;

- env->insn_aux_data[insn_idx].seen = true;
+ regs = cur_regs(env);
+ env->insn_aux_data[env->insn_idx].seen = true;
if (class == BPF_ALU || class == BPF_ALU64) {
err = check_alu_op(env, insn);
if (err)
@@ -3845,13 +4181,13 @@ static int do_check(struct bpf_verifier_env *env)
/* check that memory (src_reg + off) is readable,
* the state of dst_reg will be updated by this func
*/
- err = check_mem_access(env, insn_idx, insn->src_reg, insn->off,
- BPF_SIZE(insn->code), BPF_READ,
- insn->dst_reg, false);
+ err = check_mem_access(env, env->insn_idx, insn->src_reg,
+ insn->off, BPF_SIZE(insn->code),
+ BPF_READ, insn->dst_reg, false);
if (err)
return err;

- prev_src_type = &env->insn_aux_data[insn_idx].ptr_type;
+ prev_src_type = &env->insn_aux_data[env->insn_idx].ptr_type;

if (*prev_src_type == NOT_INIT) {
/* saw a valid insn
@@ -3878,10 +4214,10 @@ static int do_check(struct bpf_verifier_env *env)
enum bpf_reg_type *prev_dst_type, dst_reg_type;

if (BPF_MODE(insn->code) == BPF_XADD) {
- err = check_xadd(env, insn_idx, insn);
+ err = check_xadd(env, env->insn_idx, insn);
if (err)
return err;
- insn_idx++;
+ env->insn_idx++;
continue;
}

@@ -3897,13 +4233,13 @@ static int do_check(struct bpf_verifier_env *env)
dst_reg_type = regs[insn->dst_reg].type;

/* check that memory (dst_reg + off) is writeable */
- err = check_mem_access(env, insn_idx, insn->dst_reg, insn->off,
- BPF_SIZE(insn->code), BPF_WRITE,
- insn->src_reg, false);
+ err = check_mem_access(env, env->insn_idx, insn->dst_reg,
+ insn->off, BPF_SIZE(insn->code),
+ BPF_WRITE, insn->src_reg, false);
if (err)
return err;

- prev_dst_type = &env->insn_aux_data[insn_idx].ptr_type;
+ prev_dst_type = &env->insn_aux_data[env->insn_idx].ptr_type;

if (*prev_dst_type == NOT_INIT) {
*prev_dst_type = dst_reg_type;
@@ -3932,9 +4268,9 @@ static int do_check(struct bpf_verifier_env *env)
}

/* check that memory (dst_reg + off) is writeable */
- err = check_mem_access(env, insn_idx, insn->dst_reg, insn->off,
- BPF_SIZE(insn->code), BPF_WRITE,
- -1, false);
+ err = check_mem_access(env, env->insn_idx, insn->dst_reg,
+ insn->off, BPF_SIZE(insn->code),
+ BPF_WRITE, -1, false);
if (err)
return err;

@@ -3950,7 +4286,7 @@ static int do_check(struct bpf_verifier_env *env)
return -EINVAL;
}

- err = check_call(env, insn->imm, insn_idx);
+ err = check_call(env, insn->imm, env->insn_idx);
if (err)
return err;

@@ -3963,7 +4299,7 @@ static int do_check(struct bpf_verifier_env *env)
return -EINVAL;
}

- insn_idx += insn->off + 1;
+ env->insn_idx += insn->off + 1;
continue;

} else if (opcode == BPF_EXIT) {
@@ -3991,15 +4327,17 @@ static int do_check(struct bpf_verifier_env *env)
}

process_bpf_exit:
- insn_idx = pop_stack(env, &prev_insn_idx);
- if (insn_idx < 0) {
+ err = pop_stack(env, &env->prev_insn_idx, &env->insn_idx);
+ if (err < 0) {
+ if (err != -ENOENT)
+ return err;
break;
} else {
do_print_state = true;
continue;
}
} else {
- err = check_cond_jmp_op(env, insn, &insn_idx);
+ err = check_cond_jmp_op(env, insn, &env->insn_idx);
if (err)
return err;
}
@@ -4016,8 +4354,8 @@ static int do_check(struct bpf_verifier_env *env)
if (err)
return err;

- insn_idx++;
- env->insn_aux_data[insn_idx].seen = true;
+ env->insn_idx++;
+ env->insn_aux_data[env->insn_idx].seen = true;
} else {
verbose("invalid BPF_LD mode\n");
return -EINVAL;
@@ -4027,7 +4365,7 @@ static int do_check(struct bpf_verifier_env *env)
return -EINVAL;
}

- insn_idx++;
+ env->insn_idx++;
}

verbose("processed %d insns, stack depth %d\n",
@@ -4402,6 +4740,7 @@ static int fixup_bpf_calls(struct bpf_verifier_env *env)
struct bpf_prog *new_prog;
struct bpf_map *map_ptr;
int i, cnt, delta = 0;
+ struct bpf_insn_aux_data *aux;

for (i = 0; i < insn_cnt; i++, insn++) {
if (insn->code == (BPF_ALU | BPF_MOD | BPF_X) ||
@@ -4422,6 +4761,58 @@ static int fixup_bpf_calls(struct bpf_verifier_env *env)
continue;
}

+ if (insn->code == (BPF_ALU64 | BPF_ADD | BPF_X) ||
+ insn->code == (BPF_ALU64 | BPF_SUB | BPF_X)) {
+ const u8 code_add = BPF_ALU64 | BPF_ADD | BPF_X;
+ const u8 code_sub = BPF_ALU64 | BPF_SUB | BPF_X;
+ struct bpf_insn insn_buf[16];
+ struct bpf_insn *patch = &insn_buf[0];
+ bool issrc, isneg;
+ u32 off_reg;
+
+ aux = &env->insn_aux_data[i + delta];
+ if (!aux->alu_state ||
+ aux->alu_state == BPF_ALU_NON_POINTER)
+ continue;
+
+ isneg = aux->alu_state & BPF_ALU_NEG_VALUE;
+ issrc = (aux->alu_state & BPF_ALU_SANITIZE) ==
+ BPF_ALU_SANITIZE_SRC;
+
+ off_reg = issrc ? insn->src_reg : insn->dst_reg;
+ if (isneg)
+ *patch++ = BPF_ALU64_IMM(BPF_MUL, off_reg, -1);
+ *patch++ = BPF_MOV32_IMM(BPF_REG_AX, aux->alu_limit - 1);
+ *patch++ = BPF_ALU64_REG(BPF_SUB, BPF_REG_AX, off_reg);
+ *patch++ = BPF_ALU64_REG(BPF_OR, BPF_REG_AX, off_reg);
+ *patch++ = BPF_ALU64_IMM(BPF_NEG, BPF_REG_AX, 0);
+ *patch++ = BPF_ALU64_IMM(BPF_ARSH, BPF_REG_AX, 63);
+ if (issrc) {
+ *patch++ = BPF_ALU64_REG(BPF_AND, BPF_REG_AX,
+ off_reg);
+ insn->src_reg = BPF_REG_AX;
+ } else {
+ *patch++ = BPF_ALU64_REG(BPF_AND, off_reg,
+ BPF_REG_AX);
+ }
+ if (isneg)
+ insn->code = insn->code == code_add ?
+ code_sub : code_add;
+ *patch++ = *insn;
+ if (issrc && isneg)
+ *patch++ = BPF_ALU64_IMM(BPF_MUL, off_reg, -1);
+ cnt = patch - insn_buf;
+
+ new_prog = bpf_patch_insn_data(env, i + delta, insn_buf, cnt);
+ if (!new_prog)
+ return -ENOMEM;
+
+ delta += cnt - 1;
+ env->prog = prog = new_prog;
+ insn = new_prog->insnsi + i + delta;
+ continue;
+ }
+
if (insn->code != (BPF_JMP | BPF_CALL))
continue;

@@ -4557,6 +4948,7 @@ static void free_states(struct bpf_verifier_env *env)
if (sl)
while (sl != STATE_LIST_MARK) {
sln = sl->next;
+ free_verifier_state(&sl->state, false);
kfree(sl);
sl = sln;
}
@@ -4633,9 +5025,13 @@ int bpf_check(struct bpf_prog **prog, union bpf_attr *attr)
env->allow_ptr_leaks = capable(CAP_SYS_ADMIN);

ret = do_check(env);
+ if (env->cur_state) {
+ free_verifier_state(env->cur_state, true);
+ env->cur_state = NULL;
+ }

skip_full_check:
- while (pop_stack(env, NULL) >= 0);
+ while (!pop_stack(env, NULL, NULL));
free_states(env);

if (ret == 0)
@@ -4741,9 +5137,13 @@ int bpf_analyzer(struct bpf_prog *prog, const struct bpf_ext_analyzer_ops *ops,
env->allow_ptr_leaks = capable(CAP_SYS_ADMIN);

ret = do_check(env);
+ if (env->cur_state) {
+ free_verifier_state(env->cur_state, true);
+ env->cur_state = NULL;
+ }

skip_full_check:
- while (pop_stack(env, NULL) >= 0);
+ while (!pop_stack(env, NULL, NULL));
free_states(env);

mutex_unlock(&bpf_verifier_lock);
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 92939b5397df..580616e6fcee 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -6923,6 +6923,7 @@ static void perf_event_mmap_output(struct perf_event *event,
struct perf_output_handle handle;
struct perf_sample_data sample;
int size = mmap_event->event_id.header.size;
+ u32 type = mmap_event->event_id.header.type;
int ret;

if (!perf_event_mmap_match(event, data))
@@ -6966,6 +6967,7 @@ static void perf_event_mmap_output(struct perf_event *event,
perf_output_end(&handle);
out:
mmap_event->event_id.header.size = size;
+ mmap_event->event_id.header.type = type;
}

static void perf_event_mmap_event(struct perf_mmap_event *mmap_event)
diff --git a/kernel/hung_task.c b/kernel/hung_task.c
index f9aaf4994062..2e4869fa66c9 100644
--- a/kernel/hung_task.c
+++ b/kernel/hung_task.c
@@ -15,6 +15,7 @@
#include <linux/lockdep.h>
#include <linux/export.h>
#include <linux/sysctl.h>
+#include <linux/suspend.h>
#include <linux/utsname.h>
#include <linux/sched/signal.h>
#include <linux/sched/debug.h>
@@ -232,6 +233,28 @@ void reset_hung_task_detector(void)
}
EXPORT_SYMBOL_GPL(reset_hung_task_detector);

+static bool hung_detector_suspended;
+
+static int hungtask_pm_notify(struct notifier_block *self,
+ unsigned long action, void *hcpu)
+{
+ switch (action) {
+ case PM_SUSPEND_PREPARE:
+ case PM_HIBERNATION_PREPARE:
+ case PM_RESTORE_PREPARE:
+ hung_detector_suspended = true;
+ break;
+ case PM_POST_SUSPEND:
+ case PM_POST_HIBERNATION:
+ case PM_POST_RESTORE:
+ hung_detector_suspended = false;
+ break;
+ default:
+ break;
+ }
+ return NOTIFY_OK;
+}
+
/*
* kthread which checks for tasks stuck in D state
*/
@@ -246,7 +269,8 @@ static int watchdog(void *dummy)
long t = hung_timeout_jiffies(hung_last_checked, timeout);

if (t <= 0) {
- if (!atomic_xchg(&reset_hung_task, 0))
+ if (!atomic_xchg(&reset_hung_task, 0) &&
+ !hung_detector_suspended)
check_hung_uninterruptible_tasks(timeout);
hung_last_checked = jiffies;
continue;
@@ -260,6 +284,10 @@ static int watchdog(void *dummy)
static int __init hung_task_init(void)
{
atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
+
+ /* Disable hung task detector on suspend */
+ pm_notifier(hungtask_pm_notify, 0);
+
watchdog_task = kthread_run(watchdog, NULL, "khungtaskd");

return 0;
diff --git a/lib/div64.c b/lib/div64.c
index 58e2a404097e..a2688b882461 100644
--- a/lib/div64.c
+++ b/lib/div64.c
@@ -103,7 +103,7 @@ u64 div64_u64_rem(u64 dividend, u64 divisor, u64 *remainder)
quot = div_u64_rem(dividend, divisor, &rem32);
*remainder = rem32;
} else {
- int n = 1 + fls(high);
+ int n = fls(high);
quot = div_u64(dividend >> n, divisor >> n);

if (quot != 0)
@@ -141,7 +141,7 @@ u64 div64_u64(u64 dividend, u64 divisor)
if (high == 0) {
quot = div_u64(dividend, divisor);
} else {
- int n = 1 + fls(high);
+ int n = fls(high);
quot = div_u64(dividend >> n, divisor >> n);

if (quot != 0)
diff --git a/net/9p/protocol.c b/net/9p/protocol.c
index 9743837aebc6..766d1ef4640a 100644
--- a/net/9p/protocol.c
+++ b/net/9p/protocol.c
@@ -570,9 +570,10 @@ int p9stat_read(struct p9_client *clnt, char *buf, int len, struct p9_wstat *st)
if (ret) {
p9_debug(P9_DEBUG_9P, "<<< p9stat_read failed: %d\n", ret);
trace_9p_protocol_dump(clnt, &fake_pdu);
+ return ret;
}

- return ret;
+ return fake_pdu.offset;
}
EXPORT_SYMBOL(p9stat_read);

diff --git a/net/appletalk/atalk_proc.c b/net/appletalk/atalk_proc.c
index af46bc49e1e9..b5f84f428aa6 100644
--- a/net/appletalk/atalk_proc.c
+++ b/net/appletalk/atalk_proc.c
@@ -293,7 +293,7 @@ int __init atalk_proc_init(void)
goto out;
}

-void __exit atalk_proc_exit(void)
+void atalk_proc_exit(void)
{
remove_proc_entry("interface", atalk_proc_dir);
remove_proc_entry("route", atalk_proc_dir);
diff --git a/net/appletalk/ddp.c b/net/appletalk/ddp.c
index 5d035c1f1156..d1b68cc7da89 100644
--- a/net/appletalk/ddp.c
+++ b/net/appletalk/ddp.c
@@ -1912,12 +1912,16 @@ static const char atalk_err_snap[] __initconst =
/* Called by proto.c on kernel start up */
static int __init atalk_init(void)
{
- int rc = proto_register(&ddp_proto, 0);
+ int rc;

- if (rc != 0)
+ rc = proto_register(&ddp_proto, 0);
+ if (rc)
goto out;

- (void)sock_register(&atalk_family_ops);
+ rc = sock_register(&atalk_family_ops);
+ if (rc)
+ goto out_proto;
+
ddp_dl = register_snap_client(ddp_snap_id, atalk_rcv);
if (!ddp_dl)
printk(atalk_err_snap);
@@ -1925,12 +1929,33 @@ static int __init atalk_init(void)
dev_add_pack(&ltalk_packet_type);
dev_add_pack(&ppptalk_packet_type);

- register_netdevice_notifier(&ddp_notifier);
+ rc = register_netdevice_notifier(&ddp_notifier);
+ if (rc)
+ goto out_sock;
+
aarp_proto_init();
- atalk_proc_init();
- atalk_register_sysctl();
+ rc = atalk_proc_init();
+ if (rc)
+ goto out_aarp;
+
+ rc = atalk_register_sysctl();
+ if (rc)
+ goto out_proc;
out:
return rc;
+out_proc:
+ atalk_proc_exit();
+out_aarp:
+ aarp_cleanup_module();
+ unregister_netdevice_notifier(&ddp_notifier);
+out_sock:
+ dev_remove_pack(&ppptalk_packet_type);
+ dev_remove_pack(&ltalk_packet_type);
+ unregister_snap_client(ddp_dl);
+ sock_unregister(PF_APPLETALK);
+out_proto:
+ proto_unregister(&ddp_proto);
+ goto out;
}
module_init(atalk_init);

diff --git a/net/appletalk/sysctl_net_atalk.c b/net/appletalk/sysctl_net_atalk.c
index c744a853fa5f..d945b7c0176d 100644
--- a/net/appletalk/sysctl_net_atalk.c
+++ b/net/appletalk/sysctl_net_atalk.c
@@ -45,9 +45,12 @@ static struct ctl_table atalk_table[] = {

static struct ctl_table_header *atalk_table_header;

-void atalk_register_sysctl(void)
+int __init atalk_register_sysctl(void)
{
atalk_table_header = register_net_sysctl(&init_net, "net/appletalk", atalk_table);
+ if (!atalk_table_header)
+ return -ENOMEM;
+ return 0;
}

void atalk_unregister_sysctl(void)
diff --git a/net/netfilter/xt_cgroup.c b/net/netfilter/xt_cgroup.c
index 891f4e7e8ea7..db18c0177b0f 100644
--- a/net/netfilter/xt_cgroup.c
+++ b/net/netfilter/xt_cgroup.c
@@ -66,6 +66,38 @@ static int cgroup_mt_check_v1(const struct xt_mtchk_param *par)
return 0;
}

+static int cgroup_mt_check_v2(const struct xt_mtchk_param *par)
+{
+ struct xt_cgroup_info_v2 *info = par->matchinfo;
+ struct cgroup *cgrp;
+
+ if ((info->invert_path & ~1) || (info->invert_classid & ~1))
+ return -EINVAL;
+
+ if (!info->has_path && !info->has_classid) {
+ pr_info("xt_cgroup: no path or classid specified\n");
+ return -EINVAL;
+ }
+
+ if (info->has_path && info->has_classid) {
+ pr_info_ratelimited("path and classid specified\n");
+ return -EINVAL;
+ }
+
+ info->priv = NULL;
+ if (info->has_path) {
+ cgrp = cgroup_get_from_path(info->path);
+ if (IS_ERR(cgrp)) {
+ pr_info_ratelimited("invalid path, errno=%ld\n",
+ PTR_ERR(cgrp));
+ return -EINVAL;
+ }
+ info->priv = cgrp;
+ }
+
+ return 0;
+}
+
static bool
cgroup_mt_v0(const struct sk_buff *skb, struct xt_action_param *par)
{
@@ -95,6 +127,24 @@ static bool cgroup_mt_v1(const struct sk_buff *skb, struct xt_action_param *par)
info->invert_classid;
}

+static bool cgroup_mt_v2(const struct sk_buff *skb, struct xt_action_param *par)
+{
+ const struct xt_cgroup_info_v2 *info = par->matchinfo;
+ struct sock_cgroup_data *skcd = &skb->sk->sk_cgrp_data;
+ struct cgroup *ancestor = info->priv;
+ struct sock *sk = skb->sk;
+
+ if (!sk || !sk_fullsock(sk) || !net_eq(xt_net(par), sock_net(sk)))
+ return false;
+
+ if (ancestor)
+ return cgroup_is_descendant(sock_cgroup_ptr(skcd), ancestor) ^
+ info->invert_path;
+ else
+ return (info->classid == sock_cgroup_classid(skcd)) ^
+ info->invert_classid;
+}
+
static void cgroup_mt_destroy_v1(const struct xt_mtdtor_param *par)
{
struct xt_cgroup_info_v1 *info = par->matchinfo;
@@ -103,6 +153,14 @@ static void cgroup_mt_destroy_v1(const struct xt_mtdtor_param *par)
cgroup_put(info->priv);
}

+static void cgroup_mt_destroy_v2(const struct xt_mtdtor_param *par)
+{
+ struct xt_cgroup_info_v2 *info = par->matchinfo;
+
+ if (info->priv)
+ cgroup_put(info->priv);
+}
+
static struct xt_match cgroup_mt_reg[] __read_mostly = {
{
.name = "cgroup",
@@ -130,6 +188,20 @@ static struct xt_match cgroup_mt_reg[] __read_mostly = {
(1 << NF_INET_POST_ROUTING) |
(1 << NF_INET_LOCAL_IN),
},
+ {
+ .name = "cgroup",
+ .revision = 2,
+ .family = NFPROTO_UNSPEC,
+ .checkentry = cgroup_mt_check_v2,
+ .match = cgroup_mt_v2,
+ .matchsize = sizeof(struct xt_cgroup_info_v2),
+ .usersize = offsetof(struct xt_cgroup_info_v2, priv),
+ .destroy = cgroup_mt_destroy_v2,
+ .me = THIS_MODULE,
+ .hooks = (1 << NF_INET_LOCAL_OUT) |
+ (1 << NF_INET_POST_ROUTING) |
+ (1 << NF_INET_LOCAL_IN),
+ },
};

static int __init cgroup_mt_init(void)
diff --git a/sound/drivers/opl3/opl3_voice.h b/sound/drivers/opl3/opl3_voice.h
index eaef435e0528..abf6c23a721c 100644
--- a/sound/drivers/opl3/opl3_voice.h
+++ b/sound/drivers/opl3/opl3_voice.h
@@ -41,7 +41,7 @@ void snd_opl3_timer_func(unsigned long data);

/* Prototypes for opl3_drums.c */
void snd_opl3_load_drums(struct snd_opl3 *opl3);
-void snd_opl3_drum_switch(struct snd_opl3 *opl3, int note, int on_off, int vel, struct snd_midi_channel *chan);
+void snd_opl3_drum_switch(struct snd_opl3 *opl3, int note, int vel, int on_off, struct snd_midi_channel *chan);

/* Prototypes for opl3_oss.c */
#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
diff --git a/sound/isa/sb/sb8.c b/sound/isa/sb/sb8.c
index d77dcba276b5..1eb8b61a185b 100644
--- a/sound/isa/sb/sb8.c
+++ b/sound/isa/sb/sb8.c
@@ -111,6 +111,10 @@ static int snd_sb8_probe(struct device *pdev, unsigned int dev)

/* block the 0x388 port to avoid PnP conflicts */
acard->fm_res = request_region(0x388, 4, "SoundBlaster FM");
+ if (!acard->fm_res) {
+ err = -EBUSY;
+ goto _err;
+ }

if (port[dev] != SNDRV_AUTO_PORT) {
if ((err = snd_sbdsp_create(card, port[dev], irq[dev],
diff --git a/sound/pci/echoaudio/echoaudio.c b/sound/pci/echoaudio/echoaudio.c
index d68f99e076a8..e1f0bcd45c37 100644
--- a/sound/pci/echoaudio/echoaudio.c
+++ b/sound/pci/echoaudio/echoaudio.c
@@ -1953,6 +1953,11 @@ static int snd_echo_create(struct snd_card *card,
}
chip->dsp_registers = (volatile u32 __iomem *)
ioremap_nocache(chip->dsp_registers_phys, sz);
+ if (!chip->dsp_registers) {
+ dev_err(chip->card->dev, "ioremap failed\n");
+ snd_echo_free(chip);
+ return -ENOMEM;
+ }

if (request_irq(pci->irq, snd_echo_interrupt, IRQF_SHARED,
KBUILD_MODNAME, chip)) {
diff --git a/tools/perf/Documentation/perf-config.txt b/tools/perf/Documentation/perf-config.txt
index 5b4fff3adc4b..782a8966b721 100644
--- a/tools/perf/Documentation/perf-config.txt
+++ b/tools/perf/Documentation/perf-config.txt
@@ -114,7 +114,7 @@ Given a $HOME/.perfconfig like this:

[report]
# Defaults
- sort-order = comm,dso,symbol
+ sort_order = comm,dso,symbol
percent-limit = 0
queue-size = 0
children = true
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 3103a33c13a8..133eb7949321 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1345,8 +1345,9 @@ int cmd_top(int argc, const char **argv)
goto out_delete_evlist;

symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
- if (symbol__init(NULL) < 0)
- return -1;
+ status = symbol__init(NULL);
+ if (status < 0)
+ goto out_delete_evlist;

sort__setup_elide(stdout);

diff --git a/tools/perf/tests/evsel-tp-sched.c b/tools/perf/tests/evsel-tp-sched.c
index d0406116c905..926a8e1b5e94 100644
--- a/tools/perf/tests/evsel-tp-sched.c
+++ b/tools/perf/tests/evsel-tp-sched.c
@@ -85,5 +85,6 @@ int test__perf_evsel__tp_sched_test(struct test *test __maybe_unused, int subtes
if (perf_evsel__test_field(evsel, "target_cpu", 4, true))
ret = -1;

+ perf_evsel__delete(evsel);
return ret;
}
diff --git a/tools/perf/tests/expr.c b/tools/perf/tests/expr.c
index 01f0706995a9..9acc1e80b936 100644
--- a/tools/perf/tests/expr.c
+++ b/tools/perf/tests/expr.c
@@ -19,7 +19,7 @@ int test__expr(struct test *t __maybe_unused, int subtest __maybe_unused)
const char *p;
const char **other;
double val;
- int ret;
+ int i, ret;
struct parse_ctx ctx;
int num_other;

@@ -56,6 +56,9 @@ int test__expr(struct test *t __maybe_unused, int subtest __maybe_unused)
TEST_ASSERT_VAL("find other", !strcmp(other[1], "BAZ"));
TEST_ASSERT_VAL("find other", !strcmp(other[2], "BOZO"));
TEST_ASSERT_VAL("find other", other[3] == NULL);
+
+ for (i = 0; i < num_other; i++)
+ free((void *)other[i]);
free((void *)other);

return 0;
diff --git a/tools/perf/tests/openat-syscall-all-cpus.c b/tools/perf/tests/openat-syscall-all-cpus.c
index c531e6deb104..493ecb611540 100644
--- a/tools/perf/tests/openat-syscall-all-cpus.c
+++ b/tools/perf/tests/openat-syscall-all-cpus.c
@@ -45,7 +45,7 @@ int test__openat_syscall_event_on_all_cpus(struct test *test __maybe_unused, int
if (IS_ERR(evsel)) {
tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "syscalls", "sys_enter_openat");
pr_debug("%s\n", errbuf);
- goto out_thread_map_delete;
+ goto out_cpu_map_delete;
}

if (perf_evsel__open(evsel, cpus, threads) < 0) {
@@ -119,6 +119,8 @@ int test__openat_syscall_event_on_all_cpus(struct test *test __maybe_unused, int
perf_evsel__close_fd(evsel);
out_evsel_delete:
perf_evsel__delete(evsel);
+out_cpu_map_delete:
+ cpu_map__put(cpus);
out_thread_map_delete:
thread_map__put(threads);
return err;
diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index 7f8553630c4d..69910deab6e0 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -185,6 +185,7 @@ char *build_id_cache__linkname(const char *sbuild_id, char *bf, size_t size)
return bf;
}

+/* The caller is responsible to free the returned buffer. */
char *build_id_cache__origname(const char *sbuild_id)
{
char *linkname;
diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
index 4b893c622236..a0c9ff27c7bf 100644
--- a/tools/perf/util/config.c
+++ b/tools/perf/util/config.c
@@ -628,11 +628,10 @@ static int collect_config(const char *var, const char *value,
}

ret = set_value(item, value);
- return ret;

out_free:
free(key);
- return -1;
+ return ret;
}

int perf_config_set__collect(struct perf_config_set *set, const char *file_name,
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 44c2f62b47a3..0cf6f537f980 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1229,6 +1229,7 @@ void perf_evsel__exit(struct perf_evsel *evsel)
{
assert(list_empty(&evsel->node));
assert(evsel->evlist == NULL);
+ perf_evsel__free_counts(evsel);
perf_evsel__free_fd(evsel);
perf_evsel__free_id(evsel);
perf_evsel__free_config_terms(evsel);
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 5d420209505e..5b8bc1fd943d 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -1040,8 +1040,10 @@ int hist_entry_iter__add(struct hist_entry_iter *iter, struct addr_location *al,

err = sample__resolve_callchain(iter->sample, &callchain_cursor, &iter->parent,
iter->evsel, al, max_stack_depth);
- if (err)
+ if (err) {
+ map__put(alm);
return err;
+ }

err = iter->ops->prepare_entry(iter, al);
if (err)
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index d0b92d374ba9..29e2bb304168 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -2109,6 +2109,7 @@ static bool is_event_supported(u8 type, unsigned config)
perf_evsel__delete(evsel);
}

+ thread_map__put(tmap);
return ret;
}

@@ -2179,6 +2180,7 @@ void print_sdt_events(const char *subsys_glob, const char *event_glob,
printf(" %-50s [%s]\n", buf, "SDT event");
free(buf);
}
+ free(path);
} else
printf(" %-50s [%s]\n", nd->s, "SDT event");
if (nd2) {
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 7a1b20ec5216..d1b2348db0f9 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -4588,6 +4588,9 @@ int fork_it(char **argv)
signal(SIGQUIT, SIG_IGN);
if (waitpid(child_pid, &status, 0) == -1)
err(status, "waitpid");
+
+ if (WIFEXITED(status))
+ status = WEXITSTATUS(status);
}
/*
* n.b. fork_it() does not check for errors from for_all_cpus()
diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c
index a0591d06c61b..913539aea645 100644
--- a/tools/testing/selftests/bpf/test_verifier.c
+++ b/tools/testing/selftests/bpf/test_verifier.c
@@ -1860,6 +1860,7 @@ static struct bpf_test tests[] = {
},
.result = REJECT,
.errstr = "invalid stack off=-79992 size=8",
+ .errstr_unpriv = "R1 stack pointer arithmetic goes out of range",
},
{
"PTR_TO_STACK store/load - out of bounds high",
@@ -2243,6 +2244,8 @@ static struct bpf_test tests[] = {
BPF_EXIT_INSN(),
},
.result = ACCEPT,
+ .result_unpriv = REJECT,
+ .errstr_unpriv = "R1 stack pointer arithmetic goes out of range",
},
{
"unpriv: cmp of stack pointer",
@@ -7013,6 +7016,7 @@ static struct bpf_test tests[] = {
},
.fixup_map1 = { 3 },
.errstr = "pointer offset 1073741822",
+ .errstr_unpriv = "R0 pointer arithmetic of map value goes out of range",
.result = REJECT
},
{
@@ -7034,6 +7038,7 @@ static struct bpf_test tests[] = {
},
.fixup_map1 = { 3 },
.errstr = "pointer offset -1073741822",
+ .errstr_unpriv = "R0 pointer arithmetic of map value goes out of range",
.result = REJECT
},
{
@@ -7203,6 +7208,7 @@ static struct bpf_test tests[] = {
BPF_EXIT_INSN()
},
.errstr = "fp pointer offset 1073741822",
+ .errstr_unpriv = "R1 stack pointer arithmetic goes out of range",
.result = REJECT
},
{
diff --git a/tools/usb/usbip/libsrc/vhci_driver.c b/tools/usb/usbip/libsrc/vhci_driver.c
index ed8c9d360c0f..4225d462701d 100644
--- a/tools/usb/usbip/libsrc/vhci_driver.c
+++ b/tools/usb/usbip/libsrc/vhci_driver.c
@@ -150,7 +150,7 @@ static int get_nports(struct udev_device *hc_device)

static int vhci_hcd_filter(const struct dirent *dirent)
{
- return strcmp(dirent->d_name, "vhci_hcd") >= 0;
+ return !strncmp(dirent->d_name, "vhci_hcd.", 9);
}

static int get_ncontrollers(void)
\
 
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