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charset="utf-8" Add proper bio_split() error handling. For any error, call raid_end_bio_io() and return. Except for discard, where we end the bio directly. Signed-off-by: John Garry Reviewed-by: Hannes Reinecke Reviewed-by: Yu Kuai --- drivers/md/raid10.c | 47 ++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 46 insertions(+), 1 deletion(-) diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index f3bf1116794a..ccd95459b192 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -1159,6 +1159,7 @@ static void raid10_read_request(struct mddev *mddev, = struct bio *bio, int slot =3D r10_bio->read_slot; struct md_rdev *err_rdev =3D NULL; gfp_t gfp =3D GFP_NOIO; + int error; =20 if (slot >=3D 0 && r10_bio->devs[slot].rdev) { /* @@ -1206,6 +1207,10 @@ static void raid10_read_request(struct mddev *mddev,= struct bio *bio, if (max_sectors < bio_sectors(bio)) { struct bio *split =3D bio_split(bio, max_sectors, gfp, &conf->bio_split); + if (IS_ERR(split)) { + error =3D PTR_ERR(split); + goto err_handle; + } bio_chain(split, bio); allow_barrier(conf); submit_bio_noacct(bio); @@ -1236,6 +1241,11 @@ static void raid10_read_request(struct mddev *mddev,= struct bio *bio, mddev_trace_remap(mddev, read_bio, r10_bio->sector); submit_bio_noacct(read_bio); return; +err_handle: + atomic_dec(&rdev->nr_pending); + bio->bi_status =3D errno_to_blk_status(error); + set_bit(R10BIO_Uptodate, &r10_bio->state); + raid_end_bio_io(r10_bio); } =20 static void raid10_write_one_disk(struct mddev *mddev, struct r10bio *r10_= bio, @@ -1347,9 +1357,10 @@ static void raid10_write_request(struct mddev *mddev= , struct bio *bio, struct r10bio *r10_bio) { struct r10conf *conf =3D mddev->private; - int i; + int i, k; sector_t sectors; int max_sectors; + int error; =20 if ((mddev_is_clustered(mddev) && md_cluster_ops->area_resyncing(mddev, WRITE, @@ -1482,6 +1493,10 @@ static void raid10_write_request(struct mddev *mddev= , struct bio *bio, if (r10_bio->sectors < bio_sectors(bio)) { struct bio *split =3D bio_split(bio, r10_bio->sectors, GFP_NOIO, &conf->bio_split); + if (IS_ERR(split)) { + error =3D PTR_ERR(split); + goto err_handle; + } bio_chain(split, bio); allow_barrier(conf); submit_bio_noacct(bio); @@ -1503,6 +1518,26 @@ static void raid10_write_request(struct mddev *mddev= , struct bio *bio, raid10_write_one_disk(mddev, r10_bio, bio, true, i); } one_write_done(r10_bio); + return; +err_handle: + for (k =3D 0; k < i; k++) { + int d =3D r10_bio->devs[k].devnum; + struct md_rdev *rdev =3D conf->mirrors[d].rdev; + struct md_rdev *rrdev =3D conf->mirrors[d].replacement; + + if (r10_bio->devs[k].bio) { + rdev_dec_pending(rdev, mddev); + r10_bio->devs[k].bio =3D NULL; + } + if (r10_bio->devs[k].repl_bio) { + rdev_dec_pending(rrdev, mddev); + r10_bio->devs[k].repl_bio =3D NULL; + } + } + + bio->bi_status =3D errno_to_blk_status(error); + set_bit(R10BIO_Uptodate, &r10_bio->state); + raid_end_bio_io(r10_bio); } =20 static void __make_request(struct mddev *mddev, struct bio *bio, int secto= rs) @@ -1644,6 +1679,11 @@ static int raid10_handle_discard(struct mddev *mddev= , struct bio *bio) if (remainder) { split_size =3D stripe_size - remainder; split =3D bio_split(bio, split_size, GFP_NOIO, &conf->bio_split); + if (IS_ERR(split)) { + bio->bi_status =3D errno_to_blk_status(PTR_ERR(split)); + bio_endio(bio); + return 0; + } bio_chain(split, bio); allow_barrier(conf); /* Resend the fist split part */ @@ -1654,6 +1694,11 @@ static int raid10_handle_discard(struct mddev *mddev= , struct bio *bio) if (remainder) { split_size =3D bio_sectors(bio) - remainder; split =3D bio_split(bio, split_size, GFP_NOIO, &conf->bio_split); + if (IS_ERR(split)) { + bio->bi_status =3D errno_to_blk_status(PTR_ERR(split)); + bio_endio(bio); + return 0; + } bio_chain(split, bio); allow_barrier(conf); /* Resend the second split part */ --=20 2.31.1