[PATCH 1/7] io_uring: remove double poll on poll update

Pavel Begunkov
2021-12-15T22:09:06Z

Before updating a poll request we should remove it from poll queues,
including the double poll entry.

Fixes: b69de288e913 ("io_uring: allow events and user_data update of running poll requests")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
fs/io_uring.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 3182b67c1277..416998efaab8 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -5980,6 +5980,7 @@ static int io_poll_update(struct io_kiocb *req, unsigned int issue_flags)
* update those. For multishot, if we're racing with completion, just
* let completion re-add it.
*/
+ io_poll_remove_double(preq);
completing = !__io_poll_remove_one(preq, &preq->poll, false);
if (completing && (preq->poll.events & EPOLLONESHOT)) {
ret = -EALREADY;
--
2.34.0