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Message-Id: <20240919092302.3094725-5-john.g.garry@oracle.com>
Date: Thu, 19 Sep 2024 09:23:00 +0000
From: John Garry <john.g.garry@...cle.com>
To: axboe@...nel.dk, hch@....de
Cc: linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-raid@...r.kernel.org, martin.petersen@...cle.com,
        John Garry <john.g.garry@...cle.com>
Subject: [PATCH RFC 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.

Signed-off-by: John Garry <john.g.garry@...cle.com>
---
 drivers/md/raid0.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 32d587524778..d8ad69620c9d 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -466,6 +466,11 @@ 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 +613,11 @@ 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


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