[PATCH v2] nvme: core: shorten duration of multipath namespace rescan

[Sagi Grimberg]

> -- 
> blk_mq_freeze_queue_wait(ns->head->disk->queue); if (ret) goto out; 
> ... ... out: blk_mq_unfreeze_queue(ns->head->disk->queue);
>         return ret;
> -- 

Not sure what happened here....