From: yangerkun <yangerkun@huawei.com>
Date: Thu, 17 Oct 2019 04:12:35 +0000 (+0800)
Subject: io_uring: fix logic error in io_timeout
X-Git-Tag: v5.4-rc4~8^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8b07a65ad30e5612d9590fb50468ff4fa314cfc7;p=platform%2Fkernel%2Flinux-rpi.git

io_uring: fix logic error in io_timeout

If ctx->cached_sq_head < nxt_sq_head, we should add UINT_MAX to tmp, not
tmp_nxt.

Fixes: 5da0fb1ab34c ("io_uring: consider the overflow of sequence for timeout req")
Signed-off-by: yangerkun <yangerkun@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/fs/io_uring.c b/fs/io_uring.c
index b7d4085..1d03afd 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1949,7 +1949,7 @@ static int io_timeout(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 		 * once there is some timeout req still be valid.
 		 */
 		if (ctx->cached_sq_head < nxt_sq_head)
-			tmp_nxt += UINT_MAX;
+			tmp += UINT_MAX;
 
 		if (tmp >= tmp_nxt)
 			break;