From: Pavel Begunkov <asml.silence@gmail.com>
Date: Wed, 9 Aug 2023 15:20:21 +0000 (+0100)
Subject: io_uring: break iopolling on signal
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=dc314886cb3d0e4ab2858003e8de2917f8a3ccbd;p=tomoyo%2Ftomoyo-test1.git

io_uring: break iopolling on signal

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.1691594339.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index d0888907527d..ad4ffd3a876f 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -1673,6 +1673,9 @@ 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;