md/raid5: move checking badblock before clone bio in raid5_read_one_chunk

We don't need to clone bio if the relevant region has badblock.

Signed-off-by: Guoqing Jiang <jiangguoqing@kylinos.cn>
Signed-off-by: Song Liu <song@kernel.org>

Author: GuoqingJiang-Linux

drivers/md/raid5.c

@@ -5427,6 +5427,13 @@ static int raid5_read_one_chunk(struct mddev *mddev, struct bio *raid_bio)
 	atomic_inc(&rdev->nr_pending);
 	rcu_read_unlock();
 
+	if (is_badblock(rdev, sector, bio_sectors(raid_bio), &first_bad,
+			&bad_sectors)) {
+		bio_put(raid_bio);
+		rdev_dec_pending(rdev, mddev);
+		return 0;
+	}
+
 	align_bio = bio_clone_fast(raid_bio, GFP_NOIO, &mddev->bio_set);
 	bio_set_dev(align_bio, rdev->bdev);
 	align_bio->bi_end_io = raid5_align_endio;
@@ -5435,13 +5442,6 @@ static int raid5_read_one_chunk(struct mddev *mddev, struct bio *raid_bio)
 
 	raid_bio->bi_next = (void *)rdev;
 
-	if (is_badblock(rdev, sector, bio_sectors(align_bio), &first_bad,
-			&bad_sectors)) {
-		bio_put(align_bio);
-		rdev_dec_pending(rdev, mddev);
-		return 0;
-	}
-
 	/* No reshape active, so we can trust rdev->data_offset */
 	align_bio->bi_iter.bi_sector += rdev->data_offset;