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x86/PCI: use _CRS bus number aperture for host bridges from ACPI 

Add the host bridge bus number aperture from _CRS to the resource list.
Like the MMIO and I/O port apertures, this will be used when assigning
resources to hot-added devices or in the case of conflicts.

Note that we always use the _CRS bus number aperture, even if we're
ignoring _CRS otherwise.

[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Yinghai Lu 2012-05-17 18:51:12 -07:00 committed by Bjorn Helgaas
parent 857c3b668a
commit 5c1d81d160
1 changed files with 5 additions and 4 deletions
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9
arch/x86/pci/acpi.c
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@ -12,7 +12,6 @@ struct pci_root_info {
char name[16];
unsigned int res_num;
struct resource *res;
int busnum;
struct pci_sysdata sd;
};
@ -347,7 +346,9 @@ probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device,
{
size_t size;
sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum);
info->bridge = device;
info->res_num = 0;
acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
info);
@ -360,8 +361,6 @@ probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device,
if (!info->res)
return;
sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum);
acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
info);
}
@ -426,6 +425,8 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
} else {
probe_pci_root_info(info, device, busnum, domain);
/* insert busn res at first */
pci_add_resource(&resources, &root->secondary);
/*
* _CRS with no apertures is normal, so only fall back to
* defaults or native bridge info if we're ignoring _CRS.
@ -440,7 +441,7 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
bus = pci_create_root_bus(NULL, busnum, &pci_root_ops, sd,
&resources);
if (bus) {
bus->busn_res.end = pci_scan_child_bus(bus);
pci_scan_child_bus(bus);
pci_set_host_bridge_release(
to_pci_host_bridge(bus->bridge),
release_pci_root_info, info);