Input: mousedev - fix memory leak

Apparently, "while true; do cat </dev/null >/dev/input/mice; done" causes
an OOM in a short amount of time. Funny that nobody noticed, it actually
is very easy to trigger just by switching between VT1 and VT7...
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/mousedev.c

@@ -356,7 +356,7 @@ static void mousedev_free(struct mousedev *mousedev)
 	kfree(mousedev);
 }
 
-static int mixdev_release(void)
+static void mixdev_release(void)
 {
 	struct input_handle *handle;
 
@@ -370,8 +370,6 @@ static int mixdev_release(void)
 				mousedev_free(mousedev);
 		}
 	}
-
-	return 0;
 }
 
 static int mousedev_release(struct inode * inode, struct file * file)
@@ -384,9 +382,8 @@ static int mousedev_release(struct inode * inode, struct file * file)
 
 	if (!--list->mousedev->open) {
 		if (list->mousedev->minor == MOUSEDEV_MIX)
-			return mixdev_release();
-
-		if (!mousedev_mix.open) {
+			mixdev_release();
+		else if (!mousedev_mix.open) {
 			if (list->mousedev->exist)
 				input_close_device(&list->mousedev->handle);
 			else