From: Yu Kuai <yukuai3@huawei.com>

use md_account_bio() to enable io accounting, also make sure
mddev_suspend() will wait for all io to be done.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Xiao Ni <xni@redhat.com>
---
 drivers/md/md-linear.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/md/md-linear.c b/drivers/md/md-linear.c
index 4eb72b9dd933..71ac99646827 100644
--- a/drivers/md/md-linear.c
+++ b/drivers/md/md-linear.c
@@ -238,6 +238,7 @@ static bool linear_make_request(struct mddev *mddev, struct bio *bio)
 		bio = split;
 	}
 
+	md_account_bio(mddev, &bio);
 	bio_set_dev(bio, tmp_dev->rdev->bdev);
 	bio->bi_iter.bi_sector = bio->bi_iter.bi_sector -
 		start_sector + data_offset;
-- 
2.39.2