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Revert "io_uring/rw: drop -EOPNOTSUPP check in __io_complete_rw_common()" 

This reverts commit 90bfb28d5f.

Kevin reports that this commit causes an issue for him with LVM
snapshots, most likely because of turning off NOWAIT support while a
snapshot is being created. This makes -EOPNOTSUPP bubble back through
the completion handler, where io_uring read/write handling should just
retry it.

Reinstate the previous check removed by the referenced commit.

Cc: stable@vger.kernel.org
Fixes: 90bfb28d5f ("io_uring/rw: drop -EOPNOTSUPP check in __io_complete_rw_common()")
Reported-by: Salvatore Bonaccorso <carnil@debian.org>
Reported-by: Kevin Lumik <kevin@xf.ee>
Link: https://lore.kernel.org/io-uring/cceb723c-051b-4de2-9a4c-4aa82e1619ee@kernel.dk/
Signed-off-by: Jens Axboe <axboe@kernel.dk>
pull/1354/merge
Jens Axboe 2025-10-13 12:05:31 -06:00
parent 3a86608788
commit 927069c4ac
1 changed files with 1 additions and 1 deletions
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2
io_uring/rw.c
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@ -542,7 +542,7 @@ static void __io_complete_rw_common(struct io_kiocb *req, long res)
{
if (res == req->cqe.res)
return;
if (res == -EAGAIN && io_rw_should_reissue(req)) {
if ((res == -EOPNOTSUPP || res == -EAGAIN) && io_rw_should_reissue(req)) {
req->flags |= REQ_F_REISSUE | REQ_F_BL_NO_RECYCLE;
} else {
req_set_fail(req);