diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index b962326..40e75f6a 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -289,7 +289,7 @@
 	struct resource *res;
 	int i;
 
-	if (!child->parent)	/* It's a host bus, nothing to read */
+	if (pci_is_root_bus(child))	/* It's a host bus, nothing to read */
 		return;
 
 	if (dev->transparent) {