From: Hans Verkuil hverkuil-cisco@xs4all.nl
stable inclusion from stable-v6.6.33 commit 89af84e6514aef97266cbf7021fb900a9b832f00 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IAD6H2
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit cbe499977bc36fedae89f0a0d7deb4ccde9798fe ]
If, when waiting for a transmit to finish, the wait is interrupted, then you might get a "transmit timed out" message, even though the transmit was interrupted and did not actually time out.
Set transmit_in_progress_aborted to true if the wait_for_completion_killable() call was interrupted and ensure that the transmit is properly marked as ABORTED.
Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Reported-by: Yang, Chenyuan cy54@illinois.edu Closes: https://lore.kernel.org/linux-media/PH7PR11MB57688E64ADE4FE82E658D86DA09EA@P... Fixes: 590a8e564c6e ("media: cec: abort if the current transmit was canceled") Signed-off-by: Mauro Carvalho Chehab mchehab@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Wang Hai wanghai38@huawei.com --- drivers/media/cec/core/cec-adap.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/media/cec/core/cec-adap.c b/drivers/media/cec/core/cec-adap.c index c15abee3e9bc..3b67e922f981 100644 --- a/drivers/media/cec/core/cec-adap.c +++ b/drivers/media/cec/core/cec-adap.c @@ -490,6 +490,15 @@ int cec_thread_func(void *_adap) goto unlock; }
+ if (adap->transmit_in_progress && + adap->transmit_in_progress_aborted) { + if (adap->transmitting) + cec_data_cancel(adap->transmitting, + CEC_TX_STATUS_ABORTED, 0); + adap->transmit_in_progress = false; + adap->transmit_in_progress_aborted = false; + goto unlock; + } if (adap->transmit_in_progress && timeout) { /* * If we timeout, then log that. Normally this does @@ -744,6 +753,7 @@ int cec_transmit_msg_fh(struct cec_adapter *adap, struct cec_msg *msg, { struct cec_data *data; bool is_raw = msg_is_raw(msg); + int err;
if (adap->devnode.unregistered) return -ENODEV; @@ -908,10 +918,13 @@ int cec_transmit_msg_fh(struct cec_adapter *adap, struct cec_msg *msg, * Release the lock and wait, retake the lock afterwards. */ mutex_unlock(&adap->lock); - wait_for_completion_killable(&data->c); + err = wait_for_completion_killable(&data->c); cancel_delayed_work_sync(&data->work); mutex_lock(&adap->lock);
+ if (err) + adap->transmit_in_progress_aborted = true; + /* Cancel the transmit if it was interrupted */ if (!data->completed) { if (data->msg.tx_status & CEC_TX_STATUS_OK)