so we could remove adjust_transparent_bridge_resources..
and give x86_pci_root_bus_res_quirks chance when _CRS is not used or
not there.
v2: add print out if pci conf reading for res is used for root
v3: update after revert PCI_NO_ROOT_CRS
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
---
arch/x86/pci/acpi.c | 32 +++++++++-----------------------
arch/x86/pci/amd_bus.c | 8 ++++++--
2 files changed, 15 insertions(+), 25 deletions(-)
Index: linux-2.6/arch/x86/pci/acpi.c
===================================================================
--- linux-2.6.orig/arch/x86/pci/acpi.c
+++ linux-2.6/arch/x86/pci/acpi.c
@@ -118,23 +118,6 @@ setup_resource(struct acpi_resource *acp
}
static void
-adjust_transparent_bridge_resources(struct pci_bus *bus)
-{
- struct pci_dev *dev;
-
- list_for_each_entry(dev, &bus->devices, bus_list) {
- int i;
- u16 class = dev->class >> 8;
-
- if (class == PCI_CLASS_BRIDGE_PCI && dev->transparent) {
- for(i = 3; i < PCI_BUS_NUM_RESOURCES; i++)
- dev->subordinate->resource[i] =
- dev->bus->resource[i - 3];
- }
- }
-}
-
-static void
get_current_resources(struct acpi_device *device, int busnum,
int domain, struct pci_bus *bus)
{
@@ -161,8 +144,6 @@ get_current_resources(struct acpi_device
info.res_num = 0;
acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
&info);
- if (info.res_num)
- adjust_transparent_bridge_resources(bus);
return;
@@ -225,8 +206,15 @@ struct pci_bus * __devinit pci_acpi_scan
*/
memcpy(bus->sysdata, sd, sizeof(*sd));
kfree(sd);
- } else
- bus = pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd);
+ } else {
+ bus = pci_create_bus(NULL, busnum, &pci_root_ops, sd);
+ if (bus) {
+ if (pci_probe & PCI_USE_CRS)
+ get_current_resources(device, busnum, domain,
+ bus);
+ bus->subordinate = pci_scan_child_bus(bus);
+ }
+ }
if (!bus)
kfree(sd);
@@ -241,8 +229,6 @@ struct pci_bus * __devinit pci_acpi_scan
#endif
}
- if (bus && (pci_probe & PCI_USE__CRS))
- get_current_resources(device, busnum, domain, bus);
return bus;
}
Index: linux-2.6/arch/x86/pci/amd_bus.c
===================================================================
--- linux-2.6.orig/arch/x86/pci/amd_bus.c
+++ linux-2.6/arch/x86/pci/amd_bus.c
@@ -100,8 +100,9 @@ void x86_pci_root_bus_res_quirks(struct
int j;
struct pci_root_info *info;
- /* don't go for it if _CRS is used */
- if (pci_probe & PCI_USE__CRS)
+ /* don't go for it if _CRS is used already */
+ if (b->resource[0] != &ioport_resource ||
+ b->resource[1] != &iomem_resource)
return;
/* if only one root bus, don't need to anything */
@@ -116,6 +117,9 @@ void x86_pci_root_bus_res_quirks(struct
if (i == pci_root_num)
return;
+ printk(KERN_DEBUG "PCI: peer root bus %02x res updated from pci conf\n",
+ b->number);
+
info = &pci_root_info[i];
for (j = 0; j < info->res_num; j++) {
struct resource *res;
--
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