linux-kernel - [PATCH for-6.18/block 12/16] md/md-linear: convert to use bio_submit_split

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Message-Id: <20250905070643.2533483-13-yukuai1@huaweicloud.com>
Date: Fri,  5 Sep 2025 15:06:39 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
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Subject: [PATCH for-6.18/block 12/16] md/md-linear: convert to use bio_submit_split_bioset()

From: Yu Kuai <yukuai3@...wei.com>

Unify bio split code, prepare to fix reordered split IO.

Signed-off-by: Yu Kuai <yukuai3@...wei.com>
---
 drivers/md/md-linear.c | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/drivers/md/md-linear.c b/drivers/md/md-linear.c
index 59d7963c7843..76f85cc32942 100644
--- a/drivers/md/md-linear.c
+++ b/drivers/md/md-linear.c
@@ -256,19 +256,10 @@ static bool linear_make_request(struct mddev *mddev, struct bio *bio)
 
 	if (unlikely(bio_end_sector(bio) > end_sector)) {
 		/* This bio crosses a device boundary, so we have to split it */
-		struct bio *split = bio_split(bio, end_sector - bio_sector,
-					      GFP_NOIO, &mddev->bio_set);
-
-		if (IS_ERR(split)) {
-			bio->bi_status = errno_to_blk_status(PTR_ERR(split));
-			bio_endio(bio);
+		bio = bio_submit_split_bioset(bio, end_sector - bio_sector,
+					      &mddev->bio_set);
+		if (!bio)
 			return true;
-		}
-
-		bio_chain(split, bio);
-		trace_block_split(split, bio->bi_iter.bi_sector);
-		submit_bio_noacct(bio);
-		bio = split;
 	}
 
 	md_account_bio(mddev, &bio);
-- 
2.39.2