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

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

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Hans Verkuil 2016-07-17 13:02:44 -03:00 committed by Mauro Carvalho Chehab
parent 83505028d8
commit b7cbc89253
1 changed files with 2 additions and 1 deletions
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3
drivers/staging/media/cec/cec-api.c
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@ -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;