1 files changed, 2 insertions, 1 deletions

diff --git a/arch/x86/pci/k8-bus_64.c b/arch/x86/pci/k8-bus_64.c
index 84b2030fc2f0..4e64c58e17a0 100644
--- a/arch/x86/pci/k8-bus_64.c
+++ b/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++) {