From: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
The epoll function expects that whenever the poll file op is
called, the poll_wait function is also called. That didn't
always happen in media_request_poll(). Fix this, otherwise
epoll() would timeout when it shouldn't.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
---
drivers/media/media-request.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/media/media-request.c b/drivers/media/media-request.c
index c71a34ae6383..eec2e2b2f6ec 100644
--- a/drivers/media/media-request.c
+++ b/drivers/media/media-request.c
@@ -100,6 +100,7 @@ static __poll_t media_request_poll(struct file *filp,
if (!(poll_requested_events(wait) & EPOLLPRI))
return 0;
+ poll_wait(filp, &req->poll_wait, wait);
spin_lock_irqsave(&req->lock, flags);
if (req->state == MEDIA_REQUEST_STATE_COMPLETE) {
ret = EPOLLPRI;
@@ -110,8 +111,6 @@ static __poll_t media_request_poll(struct file *filp,
goto unlock;
}
- poll_wait(filp, &req->poll_wait, wait);
-
unlock:
spin_unlock_irqrestore(&req->lock, flags);
return ret;
--
2.20.1
