From 00159f19a5057cb779146afce1cceede692af346 Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Thu, 6 Aug 2015 19:15:30 -0700 Subject: [PATCH] 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 Signed-off-by: Dmitry Torokhov --- drivers/input/input.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/input/input.c b/drivers/input/input.c index 78d24990a816..5391abd28b27 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -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); } }