[PATCH v2 2/3] md/raid1: free old r1bio before retry write

[Xueshi Hu <xueshi.hu@smartx.com>]

From: Xueshi Hu <xueshi.hu@smartx.com>

allow_barrier() make reshape possible. Raid reshape changes the
r1conf::raid_disks and mempool, so free the old r1bio and alloc a new one
when retry write.

Signed-off-by: Xueshi Hu <xueshi.hu@smartx.com>
---
 drivers/md/raid1.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index ce48cb3af301..6c54786067b4 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1373,6 +1373,7 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
 		return;
 	}
 
+ retry_write:
 	r1_bio = alloc_r1bio(mddev, bio);
 	r1_bio->sectors = max_write_sectors;
 
@@ -1388,7 +1389,6 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
 	 */
 
 	disks = conf->raid_disks * 2;
- retry_write:
 	blocked_rdev = NULL;
 	rcu_read_lock();
 	max_sectors = r1_bio->sectors;
@@ -1468,7 +1468,7 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
 		for (j = 0; j < i; j++)
 			if (r1_bio->bios[j])
 				rdev_dec_pending(conf->mirrors[j].rdev, mddev);
-		r1_bio->state = 0;
+		free_r1bio(r1_bio);
 		allow_barrier(conf, bio->bi_iter.bi_sector);
 
 		if (bio->bi_opf & REQ_NOWAIT) {
-- 
2.40.1