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| author | Vic Yang <victoryang@google.com> | 2015-01-27 14:18:23 -0800 |
|---|---|---|
| committer | ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> | 2015-01-28 01:56:15 +0000 |
| commit | 3a1b5ec3dd91bac4833167cedcd68d9d4936ce6b (patch) | |
| tree | 68d30e75a74d553aaab9a8cc1db1f9bf74cfbe60 /include/ec_commands.h | |
| parent | 7aa976d3a4832389f868b054297a239eb7d6d685 (diff) | |
| download | chrome-ec-3a1b5ec3dd91bac4833167cedcd68d9d4936ce6b.tar.gz | |
cortex-m: disallow rescheduling if task_start() has not yet run
Most GPIO/peripheral interrupts are enabled in HOOK_INIT or some other
*_init() functions that are called before task_start(). Quite a lot of
these IRQ handler wake some task to process the interrupt, and this
causes a race condition. If the interrupt is triggered before
task_start() is called, the system may crash/hang/whatever.
Fix this by only allowing rescheduling tasks if task_start() is called.
This is basically the cortex-m version of commit e541eeb2.
BRANCH=Ryu
BUG=None
TEST=Without this fix, my Ryu P3 always crashes when cold resetting from
bootloader mode. After applying this fix, it doesn't anymore.
Change-Id: I0f81e90482ff97469c4f0423d6aa060f2ac76f74
Signed-off-by: Vic Yang <victoryang@google.com>
Reviewed-on: https://chromium-review.googlesource.com/243626
Tested-by: Vic Yang <victoryang@chromium.org>
Reviewed-by: Alec Berg <alecaberg@chromium.org>
Commit-Queue: Vic Yang <victoryang@chromium.org>
Diffstat (limited to 'include/ec_commands.h')
0 files changed, 0 insertions, 0 deletions