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x86/PCI: refactor get_current_resources()

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Rename get_current_resources() to probe_pci_root_info.

1. Remove resource list head from pci_root_info
2. Make get_current_resources() not pass resources
3. Rename get_current_resources() to probe_pci_root_info()

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Yinghai Lu 2012-04-02 18:31:53 -07:00 committed by Bjorn Helgaas
parent 4fa2649a01
commit 9a03d28d94
1 changed files with 13 additions and 21 deletions
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34
arch/x86/pci/acpi.c
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@ -12,7 +12,6 @@ struct pci_root_info {
char *name;
unsigned int res_num;
struct resource *res;
struct list_head *resources;
int busnum;
};
@ -287,7 +286,8 @@ static void coalesce_windows(struct pci_root_info *info, unsigned long type)
}
}
static void add_resources(struct pci_root_info *info)
static void add_resources(struct pci_root_info *info,
struct list_head *resources)
{
int i;
struct resource *res, *root, *conflict;
@ -311,7 +311,7 @@ static void add_resources(struct pci_root_info *info)
"ignoring host bridge window %pR (conflicts with %s %pR)\n",
res, conflict->name, conflict);
else
pci_add_resource(info->resources, res);
pci_add_resource(resources, res);
}
}
@ -323,41 +323,30 @@ static void free_pci_root_info(struct pci_root_info *info)
}
static void
get_current_resources(struct pci_root_info *info,
struct acpi_device *device, int busnum,
int domain, struct list_head *resources)
probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device,
int busnum, int domain)
{
size_t size;
info->bridge = device;
info->res_num = 0;
info->resources = resources;
acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
info);
if (!info->res_num)
return;
size = sizeof(*info->res) * info->res_num;
info->res_num = 0;
info->res = kmalloc(size, GFP_KERNEL);
if (!info->res)
return;
info->name = kasprintf(GFP_KERNEL, "PCI Bus %04x:%02x", domain, busnum);
if (!info->name)
goto name_alloc_fail;
return;
info->res_num = 0;
acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
info);
if (pci_use_crs) {
add_resources(info);
return;
}
name_alloc_fail:
free_pci_root_info(info);
}
struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
@ -422,15 +411,18 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
memcpy(bus->sysdata, sd, sizeof(*sd));
kfree(sd);
} else {
get_current_resources(&info, device, busnum, domain,
&resources);
probe_pci_root_info(&info, device, busnum, domain);
/*
* _CRS with no apertures is normal, so only fall back to
* defaults or native bridge info if we're ignoring _CRS.
*/
if (!pci_use_crs)
if (pci_use_crs)
add_resources(&info, &resources);
else {
free_pci_root_info(&info);
x86_pci_root_bus_resources(busnum, &resources);
}
bus = pci_create_root_bus(NULL, busnum, &pci_root_ops, sd,
&resources);
if (bus)