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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2011-06-18 02:50:11 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2011-06-18 02:54:02 -0700
commitda40b0b6b4d3a81c5051fe6ae0544c48c13261c4 (patch)
treec54325034ac30742fa6d0a82bc49a5396e8e66f2 /drivers
parent8c127f0717b438e6abc3d92d4ae248c4224b9dcb (diff)
Input: evdev - try to wake up readers only if we have full packet
We should only wake waiters on the event device when we actually post an EV_SYN/SYN_REPORT to the queue. Otherwise we end up making waiting threads runnable only to go right back to sleep because the device still isn't readable. Reported-by: Jeffrey Brown <jeffbrown@android.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/input/evdev.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index be0921ef6b5..4cf25347b01 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -111,7 +111,8 @@ static void evdev_event(struct input_handle *handle,
rcu_read_unlock();
- wake_up_interruptible(&evdev->wait);
+ if (type == EV_SYN && code == SYN_REPORT)
+ wake_up_interruptible(&evdev->wait);
}
static int evdev_fasync(int fd, struct file *file, int on)