From: Yu Kuai <yukuai3@huawei.com>
Date: Wed, 10 Sep 2025 06:30:56 +0000 (+0800)
Subject: md/raid0: convert raid0_make_request() to use bio_submit_split_bioset()
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=e0ed2bca7bef9267da0928a8ed6d1de41f19ecf6;p=thirdparty%2Fkernel%2Fstable.git

md/raid0: convert raid0_make_request() to use bio_submit_split_bioset()

Currently, raid0_make_request() will remap the original bio to underlying
disks to prevent reordered IO. Now that bio_submit_split_bioset() will put
original bio to the head of current->bio_list, it's safe converting to use
this helper and bio will still be ordered.

CC: Jan Kara <jack@suse.cz>
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index ca08ec2e1f274..adc9e68d064d9 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -607,19 +607,10 @@ static bool raid0_make_request(struct mddev *mddev, struct bio *bio)
 		 : sector_div(sector, chunk_sects));
 
 	if (sectors < bio_sectors(bio)) {
-		struct bio *split = bio_split(bio, sectors, GFP_NOIO,
+		bio = bio_submit_split_bioset(bio, sectors,
 					      &mddev->bio_set);
-
-		if (IS_ERR(split)) {
-			bio->bi_status = errno_to_blk_status(PTR_ERR(split));
-			bio_endio(bio);
+		if (!bio)
 			return true;
-		}
-
-		bio_chain(split, bio);
-		trace_block_split(split, bio->bi_iter.bi_sector);
-		raid0_map_submit_bio(mddev, bio);
-		bio = split;
 	}
 
 	raid0_map_submit_bio(mddev, bio);