diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 1a5a350..1d76e23 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -603,7 +603,7 @@
 	int error = 0;
 
 	if (!bus)
-		return 0;
+		return -EINVAL;
 
 	pr_debug("bus %s: add driver %s\n", bus->name, drv->name);
 	error = kobject_set_name(&drv->kobj, "%s", drv->name);