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Subject[PATCH v10 05/29] PCI: Remove argument bus for pci_create_root_bus()
Date
All pci_create_root_bus() callers have supplied
busn resource, the argument bus is equal to
busn_res->start, clean up the redundant argument
bus for simplicity.

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
---
arch/ia64/pci/pci.c | 3 +--
arch/powerpc/kernel/pci-common.c | 2 +-
arch/sparc/kernel/pci.c | 2 +-
arch/x86/pci/acpi.c | 4 ++--
drivers/parisc/dino.c | 2 +-
drivers/parisc/lba_pci.c | 3 +--
drivers/pci/host/pci-mvebu.c | 2 +-
drivers/pci/host/pci-tegra.c | 2 +-
drivers/pci/host/pci-xgene.c | 2 +-
drivers/pci/host/pcie-designware.c | 4 ++--
drivers/pci/probe.c | 26 ++++++++++++++++++++------
include/linux/pci.h | 2 +-
12 files changed, 33 insertions(+), 21 deletions(-)

diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index c642bc8..84f1eb8 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -424,7 +424,6 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
{
struct acpi_device *device = root->device;
int domain = root->segment;
- int bus = root->secondary.start;
struct pci_controller *controller;
struct pci_root_info *info = NULL;
int busnum = root->secondary.start;
@@ -465,7 +464,7 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
* should handle the case here, but it appears that IA64 hasn't
* such quirk. So we just ignore the case now.
*/
- pbus = pci_create_root_bus(NULL, domain, bus, &pci_root_ops,
+ pbus = pci_create_root_bus(NULL, domain, &pci_root_ops,
controller, &info->resources);
if (!pbus) {
pci_free_resource_list(&info->resources);
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 9913f6c..9acc08d 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -1613,7 +1613,7 @@ void pcibios_scan_phb(struct pci_controller *hose)

/* Create an empty bus for the toplevel */
bus = pci_create_root_bus(hose->parent, hose->global_number,
- hose->first_busno, hose->ops, hose, &resources);
+ hose->ops, hose, &resources);
if (bus == NULL) {
pr_err("Failed to create bus for PCI domain %04x\n",
hose->global_number);
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index e40e456..6ff363c 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -667,7 +667,7 @@ struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
pbm->busn.end = pbm->pci_last_busno;
pbm->busn.flags = IORESOURCE_BUS;
pci_add_resource(&resources, &pbm->busn);
- bus = pci_create_root_bus(parent, pbm->index, pbm->pci_first_busno,
+ bus = pci_create_root_bus(parent, pbm->index,
pbm->pci_ops, pbm, &resources);
if (!bus) {
printk(KERN_ERR "Failed to create bus for %s\n",
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index 7563855..d6aab1c 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -430,8 +430,8 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)

if (!setup_mcfg_map(info, domain, (u8)root->secondary.start,
(u8)root->secondary.end, root->mcfg_addr))
- bus = pci_create_root_bus(NULL, domain, busnum,
- &pci_root_ops, sd, &resources);
+ bus = pci_create_root_bus(NULL, domain, &pci_root_ops,
+ sd, &resources);

if (bus) {
pci_scan_child_bus(bus);
diff --git a/drivers/parisc/dino.c b/drivers/parisc/dino.c
index f375252..56abc43 100644
--- a/drivers/parisc/dino.c
+++ b/drivers/parisc/dino.c
@@ -986,7 +986,7 @@ static int __init dino_probe(struct parisc_device *dev)
** with configuration accessor functions.
*/
dino_dev->hba.hba_bus = bus = pci_create_root_bus(&dev->dev,
- 0, dino_current_bus, &dino_cfg_ops, NULL, &resources);
+ 0, &dino_cfg_ops, NULL, &resources);
if (!bus) {
printk(KERN_ERR "ERROR: failed to scan PCI bus on %s (duplicate bus number %d?)\n",
dev_name(&dev->dev), dino_current_bus);
diff --git a/drivers/parisc/lba_pci.c b/drivers/parisc/lba_pci.c
index 2949030..0b9ed96 100644
--- a/drivers/parisc/lba_pci.c
+++ b/drivers/parisc/lba_pci.c
@@ -1563,8 +1563,7 @@ lba_driver_probe(struct parisc_device *dev)

dev->dev.platform_data = lba_dev;
lba_bus = lba_dev->hba.hba_bus =
- pci_create_root_bus(&dev->dev, 0, lba_dev->hba.bus_num.start,
- cfg_ops, NULL, &resources);
+ pci_create_root_bus(&dev->dev, 0, cfg_ops, NULL, &resources);
if (!lba_bus) {
pci_free_resource_list(&resources);
return 0;
diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
index bc4c6c0..c91a8b4 100644
--- a/drivers/pci/host/pci-mvebu.c
+++ b/drivers/pci/host/pci-mvebu.c
@@ -756,7 +756,7 @@ static struct pci_bus *mvebu_pcie_scan_bus(int nr, struct pci_sys_data *sys)
struct mvebu_pcie *pcie = sys_to_pcie(sys);
struct pci_bus *bus;

- bus = pci_create_root_bus(&pcie->pdev->dev, -1, sys->busnr,
+ bus = pci_create_root_bus(&pcie->pdev->dev, -1,
&mvebu_pcie_ops, sys, &sys->resources);
if (!bus)
return NULL;
diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c
index 94e9362..3e45142 100644
--- a/drivers/pci/host/pci-tegra.c
+++ b/drivers/pci/host/pci-tegra.c
@@ -635,7 +635,7 @@ static struct pci_bus *tegra_pcie_scan_bus(int nr, struct pci_sys_data *sys)
struct tegra_pcie *pcie = sys_to_pcie(sys);
struct pci_bus *bus;

- bus = pci_create_root_bus(pcie->dev, -1, sys->busnr, &tegra_pcie_ops,
+ bus = pci_create_root_bus(pcie->dev, -1, &tegra_pcie_ops,
sys, &sys->resources);
if (!bus)
return NULL;
diff --git a/drivers/pci/host/pci-xgene.c b/drivers/pci/host/pci-xgene.c
index c048e03..f11e77b 100644
--- a/drivers/pci/host/pci-xgene.c
+++ b/drivers/pci/host/pci-xgene.c
@@ -499,7 +499,7 @@ static int xgene_pcie_probe_bridge(struct platform_device *pdev)
if (ret)
return ret;

- bus = pci_create_root_bus(&pdev->dev, -1, 0,
+ bus = pci_create_root_bus(&pdev->dev, -1,
&xgene_pcie_ops, port, &res);
if (!bus)
return -ENOMEM;
diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index 93778b9..8854d25 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -728,8 +728,8 @@ static struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys)
struct pcie_port *pp = sys_to_pcie(sys);

pp->root_bus_nr = sys->busnr;
- bus = pci_create_root_bus(pp->dev, -1, sys->busnr,
- &dw_pcie_ops, sys, &sys->resources);
+ bus = pci_create_root_bus(pp->dev, -1, &dw_pcie_ops, sys,
+ &sys->resources);
if (!bus)
return NULL;

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 9f9445e..52b9257 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -59,6 +59,17 @@ static struct resource *get_pci_domain_busn_res(int domain_nr)
return &r->res;
}

+static struct resource_entry *pci_busn_resource(
+ struct list_head *resources)
+{
+ struct resource_entry *entry;
+
+ resource_list_for_each_entry(entry, resources)
+ if (entry->res->flags & IORESOURCE_BUS)
+ return entry;
+ return NULL;
+}
+
static int find_anything(struct device *dev, void *data)
{
return 1;
@@ -1892,18 +1903,21 @@ void __weak pcibios_remove_bus(struct pci_bus *bus)
}

struct pci_bus *pci_create_root_bus(struct device *parent, int domain,
- int bus, struct pci_ops *ops, void *sysdata,
- struct list_head *resources)
+ struct pci_ops *ops, void *sysdata, struct list_head *resources)
{
- int error;
+ int error, bus;
struct pci_host_bridge *bridge;
struct pci_bus *b, *b2;
- struct resource_entry *window, *n;
+ struct resource_entry *window, *n, *busn_res;
struct resource *res;
resource_size_t offset;
char bus_addr[64];
char *fmt;

+ busn_res = pci_busn_resource(resources);
+ if (!busn_res)
+ return NULL;
+ bus = busn_res->res->start;
b = pci_alloc_bus(NULL);
if (!b)
return NULL;
@@ -2077,7 +2091,7 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, int domain,
break;
}

- b = pci_create_root_bus(parent, domain, bus, ops,
+ b = pci_create_root_bus(parent, domain, ops,
sysdata, resources);
if (!b)
return NULL;
@@ -2107,7 +2121,7 @@ struct pci_bus *pci_scan_bus(int domain, int bus,
pci_add_resource(&resources, &ioport_resource);
pci_add_resource(&resources, &iomem_resource);
pci_add_resource(&resources, &busn_resource);
- b = pci_create_root_bus(NULL, domain, bus, ops, sysdata,
+ b = pci_create_root_bus(NULL, domain, ops, sysdata,
&resources);
if (b) {
pci_scan_child_bus(b);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 0bdc639..df77a62 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -776,7 +776,7 @@ struct pci_bus *pci_find_bus(int domain, int busnr);
void pci_bus_add_devices(const struct pci_bus *bus);
struct pci_bus *pci_scan_bus(int domain, int bus, struct pci_ops *ops,
void *sysdata);
-struct pci_bus *pci_create_root_bus(struct device *parent, int domain, int bus,
+struct pci_bus *pci_create_root_bus(struct device *parent, int domain,
struct pci_ops *ops, void *sysdata,
struct list_head *resources);
int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
--
1.7.1


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