Fix new incorrect error return from do_md_stop.

Recent commit c8c00a6915a2e3d10416e8bdd3138429beb96210
changed the exit paths in do_md_stop and was not quite
careful enough.  There is one path were 'err' now needs
to be cleared but it isn't.
So setting an array to readonly (with mdadm --readonly) will
work, but will incorrectly report and error: ENXIO.

Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 103f2d3..9dd8720 100644 (file)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -4364,6 +4364,7 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open)
                if (mode == 1)
                        set_disk_ro(disk, 1);
                clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
+               err = 0;
        }
 out:
        mutex_unlock(&mddev->open_mutex);