linux-kernel - [PATCH v3 4/6] md/raid0: Handle bio

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Message-Id: <20241031095918.99964-5-john.g.garry@oracle.com>
Date: Thu, 31 Oct 2024 09:59:16 +0000
From: John Garry <john.g.garry@...cle.com>
To: axboe@...nel.dk, song@...nel.org, yukuai3@...wei.com, hch@....de
Cc: martin.petersen@...cle.com, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org, hare@...e.de,
        Johannes.Thumshirn@....com, John Garry <john.g.garry@...cle.com>
Subject: [PATCH v3 4/6] md/raid0: Handle bio_split() errors

Add proper bio_split() error handling. For any error, set bi_status, end
the bio, and return.

Reviewed-by: Yu Kuai <yukuai3@...wei.com>
Signed-off-by: John Garry <john.g.garry@...cle.com>
---
 drivers/md/raid0.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 32d587524778..baaf5f8b80ae 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -466,6 +466,12 @@ static void raid0_handle_discard(struct mddev *mddev, struct bio *bio)
 		struct bio *split = bio_split(bio,
 			zone->zone_end - bio->bi_iter.bi_sector, GFP_NOIO,
 			&mddev->bio_set);
+
+		if (IS_ERR(split)) {
+			bio->bi_status = errno_to_blk_status(PTR_ERR(split));
+			bio_endio(bio);
+			return;
+		}
 		bio_chain(split, bio);
 		submit_bio_noacct(bio);
 		bio = split;
@@ -608,6 +614,12 @@ static bool raid0_make_request(struct mddev *mddev, struct bio *bio)
 	if (sectors < bio_sectors(bio)) {
 		struct bio *split = bio_split(bio, sectors, GFP_NOIO,
 					      &mddev->bio_set);
+
+		if (IS_ERR(split)) {
+			bio->bi_status = errno_to_blk_status(PTR_ERR(split));
+			bio_endio(bio);
+			return true;
+		}
 		bio_chain(split, bio);
 		raid0_map_submit_bio(mddev, bio);
 		bio = split;
-- 
2.31.1