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Subject[PATCH 1/2] x86: clear pci_mmcfg_virt when mmcfg get rejected
[PATCH] x86: clear pci_mmcfg_virt when mmcfg get rejected

for x86_64, need to free pci_mmcfg_virt, and iounmap some pointers
when MMCONF is not reserved in E820 or acpi _CRS and get rejected

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>

Index: linux-2.6/arch/x86/pci/mmconfig-shared.c
===================================================================
--- linux-2.6.orig/arch/x86/pci/mmconfig-shared.c
+++ linux-2.6/arch/x86/pci/mmconfig-shared.c
@@ -333,6 +333,7 @@ static void __init pci_mmcfg_reject_brok

reject:
printk(KERN_ERR "PCI: Not using MMCONFIG.\n");
+ pci_mmcfg_arch_free();
kfree(pci_mmcfg_config);
pci_mmcfg_config = NULL;
pci_mmcfg_config_num = 0;
Index: linux-2.6/arch/x86/pci/mmconfig_32.c
===================================================================
--- linux-2.6.orig/arch/x86/pci/mmconfig_32.c
+++ linux-2.6/arch/x86/pci/mmconfig_32.c
@@ -146,3 +146,7 @@ int __init pci_mmcfg_arch_init(void)
raw_pci_ops = &pci_mmcfg;
return 1;
}
+
+void __init pci_mmcfg_arch_free(void)
+{
+}
Index: linux-2.6/arch/x86/pci/mmconfig_64.c
===================================================================
--- linux-2.6.orig/arch/x86/pci/mmconfig_64.c
+++ linux-2.6/arch/x86/pci/mmconfig_64.c
@@ -135,7 +135,7 @@ int __init pci_mmcfg_arch_reachable(unsi
int __init pci_mmcfg_arch_init(void)
{
int i;
- pci_mmcfg_virt = kmalloc(sizeof(*pci_mmcfg_virt) *
+ pci_mmcfg_virt = kzalloc(sizeof(*pci_mmcfg_virt) *
pci_mmcfg_config_num, GFP_KERNEL);
if (pci_mmcfg_virt == NULL) {
printk(KERN_ERR "PCI: Can not allocate memory for mmconfig structures\n");
@@ -149,9 +149,29 @@ int __init pci_mmcfg_arch_init(void)
printk(KERN_ERR "PCI: Cannot map mmconfig aperture for "
"segment %d\n",
pci_mmcfg_config[i].pci_segment);
+ pci_mmcfg_arch_free();
return 0;
}
}
raw_pci_ops = &pci_mmcfg;
return 1;
}
+
+void __init pci_mmcfg_arch_free(void)
+{
+ int i;
+
+ if (pci_mmcfg_virt == NULL)
+ return;
+
+ for (i = 0; i < pci_mmcfg_config_num; ++i) {
+ if (pci_mmcfg_virt[i].virt) {
+ iounmap(pci_mmcfg_virt[i].virt);
+ pci_mmcfg_virt[i].virt = NULL;
+ pci_mmcfg_virt[i].cfg = NULL;
+ }
+ }
+
+ kfree(pci_mmcfg_virt);
+ pci_mmcfg_virt = NULL;
+}
Index: linux-2.6/arch/x86/pci/pci.h
===================================================================
--- linux-2.6.orig/arch/x86/pci/pci.h
+++ linux-2.6/arch/x86/pci/pci.h
@@ -105,6 +105,7 @@ extern DECLARE_BITMAP(pci_mmcfg_fallback
extern int __init pci_mmcfg_arch_reachable(unsigned int seg, unsigned int bus,
unsigned int devfn);
extern int __init pci_mmcfg_arch_init(void);
+extern void __init pci_mmcfg_arch_free(void);

/*
* AMD Fam10h CPUs are buggy, and cannot access MMIO config space

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