4.9-stable review patch. If anyone has any objections, please let me know.
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From: Guoqing Jiang gqjiang@suse.com
commit 6f287ca6046edd34ed83aafb7f9033c9c2e809e2 upstream.
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.
[only the first chunk, due to b506335e5d2b ("md/raid10: skip spare disk as 'first' disk") being already applied - gregkh]
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 Cc: Ben Hutchings ben.hutchings@codethink.co.uk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/md/raid10.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -3681,6 +3681,7 @@ static int raid10_run(struct mddev *mdde
if (blk_queue_discard(bdev_get_queue(rdev->bdev))) discard_supported = true; + first = 0; }
if (mddev->queue) {