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io_uring: break iopolling on signal

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commit dc314886cb3d0e4ab2858003e8de2917f8a3ccbd upstream.

Don't keep spinning iopoll with a signal set. It'll eventually return
back, e.g. by virtue of need_resched(), but it's not a nice user
experience.

Cc: stable@vger.kernel.org
Fixes: def596e955 ("io_uring: support for IO polling")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/eeba551e82cad12af30c3220125eb6cb244cc94c.1691594339.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pavel Begunkov 2023-08-09 16:20:21 +01:00 committed by Greg Kroah-Hartman
parent 4a3e0d51c3
commit 8fa9cb5844
1 changed files with 3 additions and 0 deletions
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3
io_uring/io_uring.c
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@ -1457,6 +1457,9 @@ static int io_iopoll_check(struct io_ring_ctx *ctx, long min)
break;
nr_events += ret;
ret = 0;
if (task_sigpending(current))
return -EINTR;
} while (nr_events < min && !need_resched());
return ret;