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Input: do not emit unneeded EV_SYN when suspending 

commit 00159f19a5057cb779146afce1cceede692af346 upstream.

Do not emit EV_SYN/SYN_REPORT on suspend if there were no keys that are
still pressed as we are suspending the device (and in all other cases when
input core is forcibly releasing keys via input_dev_release_keys() call).

Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Bo Hu <bohu@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dmitry Torokhov 2015-08-06 19:15:30 -07:00 committed by syphyr
parent e5365819a5
commit c7ba251fb5
1 changed files with 4 additions and 1 deletions
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5
drivers/input/input.c
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@ -1115,6 +1115,7 @@ static int input_disable_device(struct input_dev *dev)
*/
static void input_dev_release_keys(struct input_dev *dev)
{
bool need_sync = false;
int code;
if (is_event_supported(EV_KEY, dev->evbit, EV_MAX)) {
@ -1122,9 +1123,11 @@ static void input_dev_release_keys(struct input_dev *dev)
if (is_event_supported(code, dev->keybit, KEY_MAX) &&
__test_and_clear_bit(code, dev->key)) {
input_pass_event(dev, EV_KEY, code, 0);
need_sync = true;
}
}
input_pass_event(dev, EV_SYN, SYN_REPORT, 1);
if (need_sync)
input_pass_event(dev, EV_SYN, SYN_REPORT, 1);
}
}