io_uring: don't check iopoll if request completes

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commit 9b43ef3d52 upstream.

IOPOLL request should never return IOU_OK, so the following iopoll
queueing check in io_issue_sqe() after getting IOU_OK doesn't make any
sense as would never turn true. Let's optimise on that and return a bit
earlier. It's also much more resilient to potential bugs from
mischieving iopoll implementations.

Cc:  <stable@vger.kernel.org>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/2f8690e2fa5213a2ff292fac29a7143c036cdd60.1701390926.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Pavel Begunkov 2023-12-01 00:38:52 +00:00 • committed by Greg Kroah-Hartman

parent d15de929f0

commit 2c487fbf22

1 changed files with 5 additions and 1 deletions

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io_uring/io_uring.c

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