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UPSTREAM: Input: reset device timestamp on sync

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We need to reset input device's timestamp on input_sync(), otherwise
drivers not using input_set_timestamp() will end up with a stale
timestamp after their clients consume first input event.

Bug: 150896413
Fixes: 3b51c44bd6 ("Input: allow drivers specify timestamp for input events")
Reported-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
(cherry picked from commit 4370b231d1)
Signed-off-by: Hridya Valsaraju <hridya@google.com>
Change-Id: I35b76cbed146a4ee8e021388eb7a68282daf9003
This commit is contained in:
Dmitry Torokhov 2019-08-29 16:55:26 -07:00 committed by Hridya Valsaraju
parent e6ae32babb
commit 8c219ccb7b
1 changed files with 7 additions and 0 deletions
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7
drivers/input/input.c
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@ -400,6 +400,13 @@ static void input_handle_event(struct input_dev *dev,
if (dev->num_vals >= 2)
input_pass_values(dev, dev->vals, dev->num_vals);
dev->num_vals = 0;
/*
* Reset the timestamp on flush so we won't end up
* with a stale one. Note we only need to reset the
* monolithic one as we use its presence when deciding
* whether to generate a synthetic timestamp.
*/
dev->timestamp[INPUT_CLK_MONO] = ktime_set(0, 0);
} else if (dev->num_vals >= dev->max_vals - 2) {
dev->vals[dev->num_vals++] = input_value_sync;
input_pass_values(dev, dev->vals, dev->num_vals);