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    Subject[PATCH 4.9 094/102] md/raid10: reset the first at the end of loop
    Date
    4.9-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    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) {

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