Input: mousedev - do not wake up readers when receiving 0-motion

       event.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --git a/drivers/input/mousedev.c b/drivers/input/mousedev.c
index 96fb9870834abfbb6b15b2a2df423b315dbc9da1..08b191180af043898ace78705faedf4e4ee0409b 100644 (file)
--- a/drivers/input/mousedev.c
+++ b/drivers/input/mousedev.c
@@ -220,6 +220,7 @@ static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_h
        struct mousedev_list *list;
        struct mousedev_motion *p;
        unsigned long flags;
+       int wake_readers = 0;
 
        list_for_each_entry(list, &mousedev->list, node) {
                spin_lock_irqsave(&list->packet_lock, flags);
@@ -255,11 +256,14 @@ static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_h
 
                spin_unlock_irqrestore(&list->packet_lock, flags);
 
-               if (list->ready)
+               if (list->ready) {
                        kill_fasync(&list->fasync, SIGIO, POLL_IN);
+                       wake_readers = 1;
+               }
        }
 
-       wake_up_interruptible(&mousedev->wait);
+       if (wake_readers)
+               wake_up_interruptible(&mousedev->wait);
 }
 
 static void mousedev_touchpad_touch(struct mousedev *mousedev, int value)