6.4-stable review patch. If anyone has any objections, please let me know.
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From: Pavel Begunkov asml.silence@gmail.com
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: def596e9557c9 ("io_uring: support for IO polling") Signed-off-by: Pavel Begunkov asml.silence@gmail.com Link: https://lore.kernel.org/r/eeba551e82cad12af30c3220125eb6cb244cc94c.169159433... Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- io_uring/io_uring.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -1689,6 +1689,9 @@ static int io_iopoll_check(struct io_rin break; nr_events += ret; ret = 0; + + if (task_sigpending(current)) + return -EINTR; } while (nr_events < min && !need_resched());
return ret;