diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 7662ab7b2640a5167ecc89bded0ef2adbb35ccd5..59011ce9840fc48b537315b49ca5f02fefd2ed95 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1684,7 +1684,10 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
 		list_move_tail(&window->list, &bridge->windows);
 		res = window->res;
 		offset = window->offset;
-		pci_bus_add_resource(b, res, 0);
+		if (res->flags & IORESOURCE_BUS)
+			pci_bus_insert_busn_res(b, bus, res->end);
+		else
+			pci_bus_add_resource(b, res, 0);
 		if (offset) {
 			if (resource_type(res) == IORESOURCE_IO)
 				fmt = " (bus address [%#06llx-%#06llx])";