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Input: do not emit unneeded EV_SYN when suspending 

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>
This commit is contained in:
Dmitry Torokhov 2015-08-06 19:15:30 -07:00
parent 6fd3850227
commit 00159f19a5
1 changed files with 8 additions and 2 deletions
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10
drivers/input/input.c
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@ -674,13 +674,19 @@ EXPORT_SYMBOL(input_close_device);
*/
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)) {
for_each_set_bit(code, dev->key, KEY_CNT)
for_each_set_bit(code, dev->key, KEY_CNT) {
input_pass_event(dev, EV_KEY, code, 0);
need_sync = true;
}
if (need_sync)
input_pass_event(dev, EV_SYN, SYN_REPORT, 1);
memset(dev->key, 0, sizeof(dev->key));
input_pass_event(dev, EV_SYN, SYN_REPORT, 1);
}
}