On Fri, Apr 16, 2021 at 10:12:11AM -0700, Yuanyuan Zhong wrote: > > if (poll) > > nvme_execute_rq_polled(req->q, NULL, req, at_head); > You may need to audit other completion handlers for blk_execute_rq_nowait(). Why? Those callers already provide their own callback that directly get the error. > How to get error ret from polled rq? Please see nvme_end_sync_rq() for that driver's polled handler callback. It already has the error.