io_uring/net: fix sendzc lazy wake polling

[ Upstream commit ef42b85a5609cd822ca0a68dd2bef2b12b5d1ca3 ]

SEND[MSG]_ZC produces multiple CQEs via notifications, LAZY_WAKE doesn't
handle it and so disable LAZY_WAKE for sendzc polling. It should be
fine, sends are not likely to be polled in the first place.

Fixes: 6ce4a93dbb5b ("io_uring/poll: use IOU_F_TWQ_LAZY_WAKE for wakeups")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/5b360fb352d91e3aec751d75c87dfb4753a084ee.1714488419.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/io_uring/net.c b/io_uring/net.c
index d193b87d0a03b125aae83feb1a01ba5d3808de37..099ab92cca0b70543b24fb130701694cee68de2f 100644 (file)
--- a/io_uring/net.c
+++ b/io_uring/net.c
@@ -1022,6 +1022,7 @@ int io_send_zc_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
        struct io_kiocb *notif;
 
        zc->done_io = 0;
+       req->flags |= REQ_F_POLL_NO_LAZY;
 
        if (unlikely(READ_ONCE(sqe->__pad2[0]) || READ_ONCE(sqe->addr3)))
                return -EINVAL;