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 d5bad0bea6e4b190e623c24279ef017a05d75323..0d9f49c575e0f5e5e8ae4014884769f26d4e3beb 100644 (file)
--- 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;