Input: gameport - check return value of gameport_register_driver()

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/joystick/adi.c b/drivers/input/joystick/adi.c
index d1ca8a1..89c4c08 100644
--- a/drivers/input/joystick/adi.c
+++ b/drivers/input/joystick/adi.c
@@ -572,8 +572,7 @@
 
 static int __init adi_init(void)
 {
-	gameport_register_driver(&adi_drv);
-	return 0;
+	return gameport_register_driver(&adi_drv);
 }
 
 static void __exit adi_exit(void)