This is a note to let you know that I've just added the patch titled

Input: do not emit unneeded EV_SYN when suspending

to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: input-do-not-emit-unneeded-ev_syn-when-suspending.patch and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From 00159f19a5057cb779146afce1cceede692af346 Mon Sep 17 00:00:00 2001

From: Dmitry Torokhov dmitry.torokhov@gmail.com Date: Thu, 6 Aug 2015 19:15:30 -0700 Subject: Input: do not emit unneeded EV_SYN when suspending

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

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); } }

Patches currently in stable-queue which might be from dmitry.torokhov@gmail.com are

queue-3.18/input-do-not-emit-unneeded-ev_syn-when-suspending.patch