diff --git a/[refs] b/[refs]
index 31078ee696c3..e6a0b1879da3 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 6e184f299d696203bc40545b9db216089d88bef7
+refs/heads/master: 4cf19463745fad81ef2eed3e4e0038da5fd153f8
diff --git a/trunk/arch/x86/pci/k8-bus_64.c b/trunk/arch/x86/pci/k8-bus_64.c
index 84b2030fc2f0..4e64c58e17a0 100644
--- a/trunk/arch/x86/pci/k8-bus_64.c
+++ b/trunk/arch/x86/pci/k8-bus_64.c
@@ -69,7 +69,8 @@ void set_pci_bus_resources_arch_default(struct pci_bus *b)
 	int j;
 	struct pci_root_info *info;
 
-	if (!pci_root_num)
+	/* if only one root bus, don't need to anything */
+	if (pci_root_num < 2)
 		return;
 
 	for (i = 0; i < pci_root_num; i++) {