CISS_REQ_BUSY
if ((cr->cr_flags & CISS_REQ_BUSY) == 0)
cr->cr_flags &= ~CISS_REQ_BUSY;
cr->cr_flags |= CISS_REQ_BUSY;
cr->cr_flags |= CISS_REQ_BUSY;
if ((cr->cr_flags & CISS_REQ_BUSY) == 0)