evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

[media] cec: poll should check if there is room in the tx queue

Browse source 
For POLLOUT poll only checked if the adapter was configured, not
if there was room in the transmit queue. Add that check.

Change-Id: I56fc0585999f4c5ac313305fe43c54a2a1592879
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Git-commit: b7cbc892532316f2abd880186301e57239a17f28
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
Signed-off-by: Ray Zhang <rayz@codeaurora.org>
This commit is contained in:
Hans Verkuil 2016-07-17 13:02:44 -03:00 • committed by Ray Zhang
parent 69333ef727
commit fd4d3bb6fe
1 changed files with 2 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
drivers/staging/media/cec/cec-api.c
View file

@ -52,7 +52,8 @@ static unsigned int cec_poll(struct file *filp,
if (!devnode->registered)
return POLLERR | POLLHUP;
mutex_lock(&adap->lock);
if (adap->is_configured)
if (adap->is_configured &&
adap->transmit_queue_sz < CEC_MAX_MSG_TX_QUEUE_SZ)
res |= POLLOUT | POLLWRNORM;
if (fh->queued_msgs)
res |= POLLIN | POLLRDNORM;