[media] cec: CEC_RECEIVE is allowed in monitor mode

When the device is in monitor mode, then you should always be able to
call CEC_RECEIVE, even it the device is unconfigured.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/staging/media/cec/cec-api.c

@@ -263,7 +263,7 @@ static long cec_receive(struct cec_adapter *adap, struct cec_fh *fh,
 	if (copy_from_user(&msg, parg, sizeof(msg)))
 		return -EFAULT;
 	mutex_lock(&adap->lock);
-	if (!adap->is_configured)
+	if (!adap->is_configured && fh->mode_follower < CEC_MODE_MONITOR)
 		err = -ENONET;
 	mutex_unlock(&adap->lock);
 	if (err)