firmware loader: fix compile failure if !PM

'return 0' should be added to fw_pm_notify if !PM because
return value of the funcion is defined as 'int'.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 3 insertions, 1 deletions

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)