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io_uring/rw: fix wrong NOWAIT check in io_rw_init_file()

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Commit ae6a888a4357131c01d85f4c91fb32552dd0bf70 upstream.

A previous commit improved how !FMODE_NOWAIT is dealt with, but
inadvertently negated a check whilst doing so. This caused -EAGAIN to be
returned from reading files with O_NONBLOCK set. Fix up the check for
REQ_F_SUPPORT_NOWAIT.

Reported-by: Julian Orth <ju.orth@gmail.com>
Link: https://github.com/axboe/liburing/issues/1270
Fixes: f7c913438533 ("io_uring/rw: allow pollable non-blocking attempts for !FMODE_NOWAIT")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jens Axboe
2024-10-19 09:16:51 -06:00
committed by Greg Kroah-Hartman
parent 62d5d980b5
commit 029d39ae7e
1 changed files with 1 additions and 1 deletions
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2
io_uring/rw.c
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@@ -696,7 +696,7 @@ static int io_rw_init_file(struct io_kiocb *req, fmode_t mode)
* reliably. If not, or it IOCB_NOWAIT is set, don't retry.
*/
if (kiocb->ki_flags & IOCB_NOWAIT ||
((file->f_flags & O_NONBLOCK && (req->flags & REQ_F_SUPPORT_NOWAIT))))
((file->f_flags & O_NONBLOCK && !(req->flags & REQ_F_SUPPORT_NOWAIT))))
req->flags |= REQ_F_NOWAIT;
if (ctx->flags & IORING_SETUP_IOPOLL) {