From 1bacd264d3c3a05de4afdd1712c9dd6ccebb9490 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Mon, 20 Jun 2022 06:39:27 -0600
Subject: [PATCH] io_uring: mark reissue requests with REQ_F_PARTIAL_IO
Git-commit: 1bacd264d3c3a05de4afdd1712c9dd6ccebb9490
Patch-mainline: v5.19-rc4
References: bsc#1205205

If we mark for reissue, we assume that the buffer will remain stable.
Hence if are using a provided buffer, we need to ensure that we stick
with it for the duration of that request.

This only affects block devices that use provided buffers, as those are
the only ones that get marked with REQ_F_REISSUE.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Gabriel Krisman Bertazi <krisman@suse.de>
---
 fs/io_uring.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index d3ee4fc532fa..87c65a358678 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3437,7 +3437,7 @@ static bool __io_complete_rw_common(struct io_kiocb *req, long res)
 	if (unlikely(res != req->cqe.res)) {
 		if ((res == -EAGAIN || res == -EOPNOTSUPP) &&
 		    io_rw_should_reissue(req)) {
-			req->flags |= REQ_F_REISSUE;
+			req->flags |= REQ_F_REISSUE | REQ_F_PARTIAL_IO;
 			return true;
 		}
 		req_set_fail(req);
@@ -3487,7 +3487,7 @@ static void io_complete_rw_iopoll(struct kiocb *kiocb, long res)
 		kiocb_end_write(req);
 	if (unlikely(res != req->cqe.res)) {
 		if (res == -EAGAIN && io_rw_should_reissue(req)) {
-			req->flags |= REQ_F_REISSUE;
+			req->flags |= REQ_F_REISSUE | REQ_F_PARTIAL_IO;
 			return;
 		}
 		req->cqe.res = res;
-- 
2.35.3