[PATCH] x86/pci: don't use crs for root if we only have one root bus

[Yinghai Lu <yinghai@kernel.org>]

for AMD system, when only one PCI root, just set PCI_NO_ROOT_CRS for it

Signed-off-by: Yinghai Lu <yinghai@kernel.org>

---
 arch/x86/pci/amd_bus.c |    4 ++++
 1 file changed, 4 insertions(+)

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
@@ -561,6 +561,10 @@ static int __init early_fill_mp_bus_info
 		}
 	}
 
+	/* don't use _CRS if we only have one root */
+	if (pci_root_num <= 1)
+		pci_probe |= PCI_NO_ROOT_CRS;
+
 	return 0;
 }