[PATCH RFC 5/6] md/raid1: Handle bio_split() errors

[John Garry <john.g.garry@xxxxxxxxxx>]

Add proper bio_split() error handling. For any error, call
raid_end_bio_io() and return;

Signed-off-by: John Garry <john.g.garry@xxxxxxxxxx>
---
 drivers/md/raid1.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 6c9d24203f39..c561e2d185e2 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1383,6 +1383,10 @@ static void raid1_read_request(struct mddev *mddev, struct bio *bio,
 	if (max_sectors < bio_sectors(bio)) {
 		struct bio *split = bio_split(bio, max_sectors,
 					      gfp, &conf->bio_split);
+		if (IS_ERR(split)) {
+			raid_end_bio_io(r1_bio);
+			return;
+		}
 		bio_chain(split, bio);
 		submit_bio_noacct(bio);
 		bio = split;
@@ -1576,6 +1580,10 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
 	if (max_sectors < bio_sectors(bio)) {
 		struct bio *split = bio_split(bio, max_sectors,
 					      GFP_NOIO, &conf->bio_split);
+		if (IS_ERR(split)) {
+			raid_end_bio_io(r1_bio);
+			return;
+		}
 		bio_chain(split, bio);
 		submit_bio_noacct(bio);
 		bio = split;
-- 
2.31.1