6.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Olivier Langlois <olivier@xxxxxxxxxxxxxx> commit 2c762be5b798c443612c1bb9b011de4fdaebd1c5 upstream. This refresh statement was originally present in the original patch: https://lore.kernel.org/netdev/20221121191437.996297-2-shr@xxxxxxxxxxxx/ It has been removed with no explanation in v6: https://lore.kernel.org/netdev/20230201222254.744422-2-shr@xxxxxxxxxxxx/ It is important to make the refresh for multishot requests, because if no new requests using the same NAPI device are added to the ring, the entry will become stale and be removed silently. The unsuspecting user will not know that their ring had busy polling for only 60 seconds before being pruned. Signed-off-by: Olivier Langlois <olivier@xxxxxxxxxxxxxx> Reviewed-by: Pavel Begunkov <asml.silence@xxxxxxxxx> Fixes: 8d0c12a80cdeb ("io-uring: add napi busy poll support") Cc: stable@xxxxxxxxxxxxxxx Link: https://lore.kernel.org/r/0fe61a019ec61e5708cd117cb42ed0dab95e1617.1722294646.git.olivier@xxxxxxxxxxxxxx Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- io_uring/poll.c | 1 + 1 file changed, 1 insertion(+) diff --git a/io_uring/poll.c b/io_uring/poll.c index 0a8e02944689..1f63b60e85e7 100644 --- a/io_uring/poll.c +++ b/io_uring/poll.c @@ -347,6 +347,7 @@ static int io_poll_check_events(struct io_kiocb *req, struct io_tw_state *ts) v &= IO_POLL_REF_MASK; } while (atomic_sub_return(v, &req->poll_refs) & IO_POLL_REF_MASK); + io_napi_add(req); return IOU_POLL_NO_ACTION; } -- 2.46.0
