x86: multi pci root bus with different io resource range, on 64-bit

scan AMD opteron io/mmio routing to make sure every pci root bus get correct
resource range. Thus later pci scan could assign correct resource to device
with unassigned resource.

this can fix a system without _CRS for multi pci root bus.

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index a40043bd3257..4a55bf380957 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1088,6 +1088,10 @@ unsigned int __devinit pci_scan_child_bus(struct pci_bus *bus)
         return max;
 }
 
+void __attribute__((weak)) set_pci_bus_resources_arch_default(struct pci_bus *b)
+{
+}
+
 struct pci_bus * pci_create_bus(struct device *parent,
                 int bus, struct pci_ops *ops, void *sysdata)
 {
@@ -1147,6 +1151,8 @@ struct pci_bus * pci_create_bus(struct device *parent,
         b->resource[0] = &ioport_resource;
         b->resource[1] = &iomem_resource;
 
+        set_pci_bus_resources_arch_default(b);
+
         return b;
 
 dev_create_file_err: