isp_send_cmd
int isp_send_cmd(ispsoftc_t *, void *, void *, uint32_t, uint32_t, isp_ddir_t);
if (isp_send_cmd(isp, rq, dm_segs, nsegs, xs->datalen, ddir)
if (isp_send_cmd(isp, rq, dm_segs, nsegs, xs->datalen, ddir) != CMD_QUEUED) {