diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 5bd2100a4dcf..4c8d8efecdf4 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -1242,7 +1242,9 @@ static int fw_pm_notify(struct notifier_block *notify_block,
 #else
 static int fw_pm_notify(struct notifier_block *notify_block,
 			unsigned long mode, void *unused)
-{}
+{
+	return 0;
+}
 #endif
 
 static void __init fw_cache_init(void)