3.18-stable review patch. If anyone has any objections, please let me know.
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From: Dmitry Torokhov dmitry.torokhov@gmail.com
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
--- drivers/input/input.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
--- 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(struc 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); } }