diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index 561fa30..6646283 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -814,14 +814,13 @@
 	struct pci_bus *bus;
 	struct pcie_port *pp = sys_to_pcie(sys);
 
-	if (pp) {
-		pp->root_bus_nr = sys->busnr;
-		bus = pci_scan_root_bus(pp->dev, sys->busnr, &dw_pcie_ops,
-					sys, &sys->resources);
-	} else {
-		bus = NULL;
-		BUG();
-	}
+	pp->root_bus_nr = sys->busnr;
+	bus = pci_create_root_bus(pp->dev, sys->busnr,
+				  &dw_pcie_ops, sys, &sys->resources);
+	if (!bus)
+		return NULL;
+
+	pci_scan_child_bus(bus);
 
 	if (bus && pp->ops->scan_bus)
 		pp->ops->scan_bus(pp);