From: Dmitry Torokhov Date: Fri, 7 Aug 2015 02:15:30 +0000 (-0700) Subject: Input: do not emit unneeded EV_SYN when suspending X-Git-Tag: v3.18.94~37 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=33fd368597ad615f9f7232ca9daa3ed3fdba1516;p=thirdparty%2Fkernel%2Fstable.git 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 Signed-off-by: Dmitry Torokhov Signed-off-by: Bo Hu Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/input/input.c b/drivers/input/input.c index 0f175f55782b4..34aae7e5498a7 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -668,6 +668,7 @@ 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)) { @@ -675,9 +676,11 @@ 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); } }