ublk_complete_io
ublk_complete_io(t, q, tag, iod->nr_sectors << 9);
ublk_complete_io(t, q, tag, io->result);
ublk_complete_io(t, q, tag, queued);
ublk_complete_io(t, q, tag, io->result);
ublk_complete_io(t, q, tag, iod->nr_sectors << 9);
ublk_complete_io(t, q, tag, res);