diff options
| author | Koro Chen <koro.chen@mediatek.com> | 2016-07-05 15:40:49 +0800 |
|---|---|---|
| committer | ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> | 2016-11-21 23:59:59 +0000 |
| commit | 92beb2bf394e86e17c3c1aecb2b40a912b787997 (patch) | |
| tree | 5a4ab4c0c661df38152bafc4a497fd942f01b1a4 | |
| parent | aca2f16a3091a4dc4dab687a63beeaeb64e47e16 (diff) | |
| download | chrome-ec-92beb2bf394e86e17c3c1aecb2b40a912b787997.tar.gz | |
UPSTREAM: motion: Fix comparison between signed and unsigned integer
If wait_us < 0, comparison against motion_min_interval actually fails,
and this negative wait_us causes task_wait_event() never returns if we
are not using any motion task event except the timer. The motion task
will then stop running and sensor data stay unchanged.
BRANCH=samus
BUG=chrome-os-partner:54092, b:27849483
TEST=hardcode wait_us to a negative value before motion_min_interval check,
and see motion task is still running by EC console cmd timerinfo
Change-Id: Ic1e7ffeeb9d2ec1f5c5beb4387294014298123af
Signed-off-by: Koro Chen <koro.chen@mediatek.com>
Reviewed-on: https://chromium-review.googlesource.com/358332
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
(cherry picked from commit 3f5d978bd523caf5797fcfeed08a5d28e6d31d79)
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/378324
| -rw-r--r-- | common/motion_sense.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/common/motion_sense.c b/common/motion_sense.c index 758d995e83..da9e10d7e5 100644 --- a/common/motion_sense.c +++ b/common/motion_sense.c @@ -827,6 +827,9 @@ void motion_sense_task(void) wait_us = motion_interval - (ts_end_task.val - ts_begin_task.val); + /* and it cannnot be negative */ + wait_us = MAX(wait_us, 0); + /* * Guarantee some minimum delay to allow other lower * priority tasks to run. |