mirror of https://gitee.com/openkylin/linux.git
ac479b51f3
Currently wait_event_interruptible_timeout is called in cec_thread_func()
when adap->transmitting is set. But if the adapter is unconfigured
while transmitting, then adap->transmitting is set to NULL. But the
hardware is still actually transmitting the message, and that's
indicated by adap->transmit_in_progress and we should wait until that
is finished or times out before transmitting new messages.
As the original commit says: adap->transmitting is the userspace view,
adap->transmit_in_progress reflects the hardware state.
However, if adap->transmitting is NULL and adap->transmit_in_progress
is true, then wait_event_interruptible is called (no timeout), which
can get stuck indefinitely if the CEC driver is flaky and never marks
the transmit-in-progress as 'done'.
So test against transmit_in_progress when deciding whether to use
the timeout variant or not, instead of testing against adap->transmitting.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Fixes:
|
||
|---|---|---|
| .. | ||
| Kconfig | ||
| Makefile | ||
| cec-adap.c | ||
| cec-api.c | ||
| cec-core.c | ||
| cec-notifier.c | ||
| cec-pin-error-inj.c | ||
| cec-pin-priv.h | ||
| cec-pin.c | ||
| cec-priv.h | ||