From: Jens Axboe <axboe@kernel.dk>
Date: Wed, 28 Sep 2022 15:49:28 +0000 (-0600)
Subject: io_uring/poll: disable level triggered poll
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d59bd748db0a97a5d6a33b284b6c58b7f6f4f768;p=linux.git

io_uring/poll: disable level triggered poll

Stefan reports that there are issues with the level triggered
notification. Since we're late in the cycle, and it was introduced for
the 6.0 release, just disable it at prep time and we can bring this
back when Samba is happy with it.

Reported-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/io_uring/poll.c b/io_uring/poll.c
index d5bad0bea6e4b..0d9f49c575e0f 100644
--- a/io_uring/poll.c
+++ b/io_uring/poll.c
@@ -857,7 +857,7 @@ int io_poll_add_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 	if (sqe->buf_index || sqe->off || sqe->addr)
 		return -EINVAL;
 	flags = READ_ONCE(sqe->len);
-	if (flags & ~(IORING_POLL_ADD_MULTI|IORING_POLL_ADD_LEVEL))
+	if (flags & ~IORING_POLL_ADD_MULTI)
 		return -EINVAL;
 	if ((flags & IORING_POLL_ADD_MULTI) && (req->flags & REQ_F_CQE_SKIP))
 		return -EINVAL;