From: Guoqing Jiang <gqjiang@suse.com>
Date: Thu, 6 Apr 2017 01:12:18 +0000 (+0800)
Subject: md/raid10: reset the 'first' at the end of loop
X-Git-Tag: v4.1.52~296
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cca3fadc5c581da9967c27c88b2c82e4055e68f9;p=thirdparty%2Fkernel%2Fstable.git

md/raid10: reset the 'first' at the end of loop

[ Upstream commit 6f287ca6046edd34ed83aafb7f9033c9c2e809e2 ]

We need to set "first = 0' at the end of rdev_for_each
loop, so we can get the array's min_offset_diff correctly
otherwise min_offset_diff just means the last rdev's
offset diff.

Suggested-by: NeilBrown <neilb@suse.com>
Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---

diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index f23f56b178019..641259fe891be 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -3702,6 +3702,7 @@ static int run(struct mddev *mddev)
 
 		if (blk_queue_discard(bdev_get_queue(rdev->bdev)))
 			discard_supported = true;
+		first = 0;
 	}
 
 	if (mddev->queue) {