[PATCH 6.0 1060/1073] io_uring: improve io_double_lock_ctx fail handling

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From: Pavel Begunkov <asml.silence@xxxxxxxxx>

commit 4c979eaefa4356d385b7c7d2877dc04d7fe88969 upstream.

msg_ring will fail the request if it can't lock rings, instead punt it
to io-wq as was originally intended.

Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
Link: https://lore.kernel.org/r/4697f05afcc37df5c8f89e2fe6d9c7c19f0241f9.1670384893.git.asml.silence@xxxxxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 io_uring/msg_ring.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/io_uring/msg_ring.c
+++ b/io_uring/msg_ring.c
@@ -164,6 +164,8 @@ int io_msg_ring(struct io_kiocb *req, un
 	}
 
 done:
+	if (ret == -EAGAIN)
+		return -EAGAIN;
 	if (ret < 0)
 		req_set_fail(req);
 	io_req_set_res(req, ret, 0);





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