x86/PCI: put busn resource in pci_root_info for native host bridge drivers
Add the host bridge bus number aperture 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.
[bhelgaas: changelog, tidy printk]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
diff --git a/arch/x86/pci/bus_numa.c b/arch/x86/pci/bus_numa.c
index 306579f..d37e2fe 100644
--- a/arch/x86/pci/bus_numa.c
+++ b/arch/x86/pci/bus_numa.c
@@ -14,7 +14,7 @@
return NULL;
list_for_each_entry(info, &pci_root_infos, list)
- if (info->bus_min == bus)
+ if (info->busn.start == bus)
return info;
return NULL;
@@ -24,6 +24,8 @@
{
struct pci_root_info *info = x86_find_pci_root_info(bus);
struct pci_root_res *root_res;
+ struct pci_host_bridge_window *window;
+ bool found = false;
if (!info)
goto default_resources;
@@ -31,6 +33,16 @@
printk(KERN_DEBUG "PCI: root bus %02x: hardware-probed resources\n",
bus);
+ /* already added by acpi ? */
+ list_for_each_entry(window, resources, list)
+ if (window->res->flags & IORESOURCE_BUS) {
+ found = true;
+ break;
+ }
+
+ if (!found)
+ pci_add_resource(resources, &info->busn);
+
list_for_each_entry(root_res, &info->resources, list) {
struct resource *res;
struct resource *root;
@@ -66,9 +78,13 @@
if (!info)
return info;
+ sprintf(info->name, "PCI Bus #%02x", bus_min);
+
INIT_LIST_HEAD(&info->resources);
- info->bus_min = bus_min;
- info->bus_max = bus_max;
+ info->busn.name = info->name;
+ info->busn.start = bus_min;
+ info->busn.end = bus_max;
+ info->busn.flags = IORESOURCE_BUS;
info->node = node;
info->link = link;