diff --git a/arch/mips/pci/ops-bridge.c b/arch/mips/pci/ops-bridge.c
index 4383194..06f2570 100644
--- a/arch/mips/pci/ops-bridge.c
+++ b/arch/mips/pci/ops-bridge.c
@@ -9,6 +9,7 @@
 #include <linux/pci.h>
 #include <asm/paccess.h>
 #include <asm/pci/bridge.h>
+
 #include <asm/sn/arch.h>
 #include <asm/sn/intr.h>
 #include <asm/sn/sn0/hub.h>
@@ -167,7 +168,7 @@ oh_my_gawd:
 static int pci_read_config(struct pci_bus *bus, unsigned int devfn,
 			   int where, int size, u32 * value)
 {
-	if (bus->number > 0)
+	if (!pci_is_root_bus(bus))
 		return pci_conf1_read_config(bus, devfn, where, size, value);
 
 	return pci_conf0_read_config(bus, devfn, where, size, value);
@@ -279,7 +280,6 @@ static int pci_conf1_write_config(struct pci_bus *bus, unsigned int devfn,
 	return PCIBIOS_SUCCESSFUL;
 
 oh_my_gawd:
-
 	/*
 	 * IOC3 is fucking fucked beyond belief ...  Don't even give the
 	 * generic PCI code a chance to touch the wrong register.
@@ -310,7 +310,7 @@ oh_my_gawd:
 static int pci_write_config(struct pci_bus *bus, unsigned int devfn,
 	int where, int size, u32 value)
 {
-	if (bus->number > 0)
+	if (!pci_is_root_bus(bus))
 		return pci_conf1_write_config(bus, devfn, where, size, value);
 
 	return pci_conf0_write_config(bus, devfn, where, size, value);