From: Jens Axboe Date: Mon, 13 Oct 2025 18:05:31 +0000 (-0600) Subject: Revert "io_uring/rw: drop -EOPNOTSUPP check in __io_complete_rw_common()" X-Git-Tag: v6.12.55~95 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=df23d9ac34552b2e4328119563a6e0dfed982f7e;p=thirdparty%2Fkernel%2Fstable.git Revert "io_uring/rw: drop -EOPNOTSUPP check in __io_complete_rw_common()" Commit 927069c4ac2cd1a37efa468596fb5b8f86db9df0 upstream. This reverts commit 90bfb28d5fa8127a113a140c9791ea0b40ab156a. 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: 90bfb28d5fa8 ("io_uring/rw: drop -EOPNOTSUPP check in __io_complete_rw_common()") Reported-by: Salvatore Bonaccorso Reported-by: Kevin Lumik Link: https://lore.kernel.org/io-uring/cceb723c-051b-4de2-9a4c-4aa82e1619ee@kernel.dk/ Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- diff --git a/io_uring/rw.c b/io_uring/rw.c index 3ad104cf1e7d8..996cd4bec4821 100644 --- a/io_uring/rw.c +++ b/io_uring/rw.c @@ -477,7 +477,7 @@ static void io_req_io_end(struct io_kiocb *req) static bool __io_complete_rw_common(struct io_kiocb *req, long res) { if (unlikely(res != req->cqe.res)) { - if (res == -EAGAIN && io_rw_should_reissue(req)) { + if ((res == -EOPNOTSUPP || res == -EAGAIN) && io_rw_should_reissue(req)) { /* * Reissue will start accounting again, finish the * current cycle.