linux-kernel - [PATCH RFC v2 07/10] blk-crypto: convert to use bio_submit_split

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Message-Id: <20250828065733.556341-8-yukuai1@huaweicloud.com>
Date: Thu, 28 Aug 2025 14:57:30 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
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Subject: [PATCH RFC v2 07/10] blk-crypto: convert to use bio_submit_split_bioset()

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

On the one hand unify bio split code, prepare to fix disordered split
IO; On the other hand fix missing blkcg_bio_issue_init() and
trace_block_split() for split IO.

Signed-off-by: Yu Kuai <yukuai3@...wei.com>
---
 block/blk-crypto-fallback.c | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/block/blk-crypto-fallback.c b/block/blk-crypto-fallback.c
index 005c9157ffb3..e6ed50d9b00f 100644
--- a/block/blk-crypto-fallback.c
+++ b/block/blk-crypto-fallback.c
@@ -223,17 +223,12 @@ static bool blk_crypto_fallback_split_bio_if_needed(struct bio **bio_ptr)
 			break;
 	}
 	if (num_sectors < bio_sectors(bio)) {
-		struct bio *split_bio;
-
-		split_bio = bio_split(bio, num_sectors, GFP_NOIO,
-				      &crypto_bio_split);
-		if (IS_ERR(split_bio)) {
-			bio->bi_status = BLK_STS_RESOURCE;
+		bio = bio_submit_split_bioset(bio, num_sectors,
+					      &crypto_bio_split);
+		if (!bio)
 			return false;
-		}
-		bio_chain(split_bio, bio);
-		submit_bio_noacct(bio);
-		*bio_ptr = split_bio;
+
+		*bio_ptr = bio;
 	}
 
 	return true;
-- 
2.39.2