linux-kernel - [PATCH v5 5/5] dm-crypt: Fix lost ioprio when queuing write bios

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Message-Id: <20231213104216.27845-6-hongyu.jin.cn@gmail.com>
Date:   Wed, 13 Dec 2023 18:42:16 +0800
From:   Hongyu Jin <hongyu.jin.cn@...il.com>
To:     agk@...hat.com, snitzer@...nel.org, mpatocka@...hat.com,
        axboe@...nel.dk, ebiggers@...nel.org
Cc:     zhiguo.niu@...soc.com, ke.wang@...soc.com, yibin.ding@...soc.com,
        hongyu.jin@...soc.com, linux-kernel@...r.kernel.org,
        dm-devel@...ts.linux.dev, linux-block@...r.kernel.org
Subject: [PATCH v5 5/5] dm-crypt: Fix lost ioprio when queuing write bios

From: Hongyu Jin <hongyu.jin@...soc.com>

The original submitting bio->bi_ioprio setting can be retained by
struct dm_crypt_io::base_bio, we set the original bio's ioprio to
the cloned bio for write.

Link: https://lore.kernel.org/dm-devel/alpine.LRH.2.11.1612141049250.13402@mail.ewheeler.net

Signed-off-by: Hongyu Jin <hongyu.jin@...soc.com>
---
 drivers/md/dm-crypt.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 6de107aff331..7149da6555b8 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1683,6 +1683,7 @@ static struct bio *crypt_alloc_buffer(struct dm_crypt_io *io, unsigned int size)
 				 GFP_NOIO, &cc->bs);
 	clone->bi_private = io;
 	clone->bi_end_io = crypt_endio;
+	clone->bi_ioprio = io->base_bio->bi_ioprio;
 
 	remaining_size = size;
 
-- 
2.34.1