Input: stop autorepeat timer on key release

Whenever you press and then release a key, the CPU wakes up
three times:
 * press
 * release
 * autorepeat timer exactly 250ms after press

The autorepeat timer has nothing to do, obviously, since you already
have released the key, so stop it on key release.

[dtor@mail.ru: This changes autorepeat behavior a bit since we now stop
 autorepeat even if key that is being released is not the one that is
 being auto-repeated, but I believe the new behavior is better.]

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/input/input.c b/drivers/input/input.c
index 1730d7331a5d..46e9ce195064 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -132,6 +132,11 @@ static void input_start_autorepeat(struct input_dev *dev, int code)
         }
 }
 
+static void input_stop_autorepeat(struct input_dev *dev)
+{
+        del_timer(&dev->timer);
+}
+
 #define INPUT_IGNORE_EVENT      0
 #define INPUT_PASS_TO_HANDLERS  1
 #define INPUT_PASS_TO_DEVICE    2
@@ -167,6 +172,8 @@ static void input_handle_event(struct input_dev *dev,
                                 __change_bit(code, dev->key);
                                 if (value)
                                         input_start_autorepeat(dev, code);
+                                else
+                                        input_stop_autorepeat(dev);
                         }
 
                         disposition = INPUT_PASS_TO_HANDLERS;