Input: handle serio_register_driver() errors

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/keyboard/sunkbd.c b/drivers/input/keyboard/sunkbd.c
index d1b62f7..d6ab6d4 100644
--- a/drivers/input/keyboard/sunkbd.c
+++ b/drivers/input/keyboard/sunkbd.c
@@ -352,8 +352,7 @@
 
 static int __init sunkbd_init(void)
 {
-	serio_register_driver(&sunkbd_drv);
-	return 0;
+	return serio_register_driver(&sunkbd_drv);
 }
 
 static void __exit sunkbd_exit(void)