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: v4.12-rc1~121^2^2~27
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6f287ca6046edd34ed83aafb7f9033c9c2e809e2;p=platform%2Fkernel%2Flinux-exynos.git

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

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>
---

diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 0f13d57..e055ec9 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -3769,6 +3769,7 @@ static int raid10_run(struct mddev *mddev)
 
 		if (blk_queue_discard(bdev_get_queue(rdev->bdev)))
 			discard_supported = true;
+		first = 0;
 	}
 
 	if (mddev->queue) {
@@ -4172,6 +4173,7 @@ static int raid10_start_reshape(struct mddev *mddev)
 			if (first || diff < min_offset_diff)
 				min_offset_diff = diff;
 		}
+		first = 0;
 	}
 
 	if (max(before_length, after_length) > min_offset_diff)