1 files changed, 43 insertions, 55 deletions

diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index d1ac73fcd852..c50a7abda744 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -377,7 +377,6 @@ static void raid0_free(struct mddev *mddev, void *priv)
 	struct r0conf *conf = priv;
 
 	free_conf(mddev, conf);
-	acct_bioset_exit(mddev);
 }
 
 static int raid0_run(struct mddev *mddev)
@@ -392,16 +391,11 @@ static int raid0_run(struct mddev *mddev)
 	if (md_check_no_bitmap(mddev))
 		return -EINVAL;
 
-	if (acct_bioset_init(mddev)) {
-		pr_err("md/raid0:%s: alloc acct bioset failed.\n", mdname(mddev));
-		return -ENOMEM;
-	}
-
 	/* if private is not null, we are here after takeover */
 	if (mddev->private == NULL) {
 		ret = create_strip_zones(mddev, &conf);
 		if (ret < 0)
-			goto exit_acct_set;
+			return ret;
 		mddev->private = conf;
 	}
 	conf = mddev->private;
@@ -432,15 +426,9 @@ static int raid0_run(struct mddev *mddev)
 
 	ret = md_integrity_register(mddev);
 	if (ret)
-		goto free;
+		free_conf(mddev, conf);
 
 	return ret;
-
-free:
-	free_conf(mddev, conf);
-exit_acct_set:
-	acct_bioset_exit(mddev);
-	return ret;
 }
 
 /*
@@ -557,54 +545,20 @@ static void raid0_handle_discard(struct mddev *mddev, struct bio *bio)
 	bio_endio(bio);
 }
 
-static bool raid0_make_request(struct mddev *mddev, struct bio *bio)
+static void raid0_map_submit_bio(struct mddev *mddev, struct bio *bio)
 {
 	struct r0conf *conf = mddev->private;
 	struct strip_zone *zone;
 	struct md_rdev *tmp_dev;
-	sector_t bio_sector;
-	sector_t sector;
-	sector_t orig_sector;
-	unsigned chunk_sects;
-	unsigned sectors;
-
-	if (unlikely(bio->bi_opf & REQ_PREFLUSH)
-	    && md_flush_request(mddev, bio))
-		return true;
-
-	if (unlikely((bio_op(bio) == REQ_OP_DISCARD))) {
-		raid0_handle_discard(mddev, bio);
-		return true;
-	}
-
-	bio_sector = bio->bi_iter.bi_sector;
-	sector = bio_sector;
-	chunk_sects = mddev->chunk_sectors;
-
-	sectors = chunk_sects -
-		(likely(is_power_of_2(chunk_sects))
-		 ? (sector & (chunk_sects-1))
-		 : sector_div(sector, chunk_sects));
-
-	/* Restore due to sector_div */
-	sector = bio_sector;
-
-	if (sectors < bio_sectors(bio)) {
-		struct bio *split = bio_split(bio, sectors, GFP_NOIO,
-					      &mddev->bio_set);
-		bio_chain(split, bio);
-		submit_bio_noacct(bio);
-		bio = split;
-	}
+	sector_t bio_sector = bio->bi_iter.bi_sector;
+	sector_t sector = bio_sector;
 
-	if (bio->bi_pool != &mddev->bio_set)
-		md_account_bio(mddev, &bio);
+	md_account_bio(mddev, &bio);
 
-	orig_sector = sector;
 	zone = find_zone(mddev->private, &sector);
 	switch (conf->layout) {
 	case RAID0_ORIG_LAYOUT:
-		tmp_dev = map_sector(mddev, zone, orig_sector, &sector);
+		tmp_dev = map_sector(mddev, zone, bio_sector, &sector);
 		break;
 	case RAID0_ALT_MULTIZONE_LAYOUT:
 		tmp_dev = map_sector(mddev, zone, sector, &sector);
@@ -612,13 +566,13 @@ static bool raid0_make_request(struct mddev *mddev, struct bio *bio)
 	default:
 		WARN(1, "md/raid0:%s: Invalid layout\n", mdname(mddev));
 		bio_io_error(bio);
-		return true;
+		return;
 	}
 
 	if (unlikely(is_rdev_broken(tmp_dev))) {
 		bio_io_error(bio);
 		md_error(mddev, tmp_dev);
-		return true;
+		return;
 	}
 
 	bio_set_dev(bio, tmp_dev->bdev);
@@ -630,6 +584,40 @@ static bool raid0_make_request(struct mddev *mddev, struct bio *bio)
 				      bio_sector);
 	mddev_check_write_zeroes(mddev, bio);
 	submit_bio_noacct(bio);
+}
+
+static bool raid0_make_request(struct mddev *mddev, struct bio *bio)
+{
+	sector_t sector;
+	unsigned chunk_sects;
+	unsigned sectors;
+
+	if (unlikely(bio->bi_opf & REQ_PREFLUSH)
+	    && md_flush_request(mddev, bio))
+		return true;
+
+	if (unlikely((bio_op(bio) == REQ_OP_DISCARD))) {
+		raid0_handle_discard(mddev, bio);
+		return true;
+	}
+
+	sector = bio->bi_iter.bi_sector;
+	chunk_sects = mddev->chunk_sectors;
+
+	sectors = chunk_sects -
+		(likely(is_power_of_2(chunk_sects))
+		 ? (sector & (chunk_sects-1))
+		 : sector_div(sector, chunk_sects));
+
+	if (sectors < bio_sectors(bio)) {
+		struct bio *split = bio_split(bio, sectors, GFP_NOIO,
+					      &mddev->bio_set);
+		bio_chain(split, bio);
+		raid0_map_submit_bio(mddev, bio);
+		bio = split;
+	}
+
+	raid0_map_submit_bio(mddev, bio);
 	return true;
 }