EHCI_QH_NEXT_QTD_PTR
(Get_QH(pp->pp_qh->qh_next_qtd) & EHCI_QH_NEXT_QTD_PTR)));
(Get_QH(old_qh->qh_next_qtd) & EHCI_QH_NEXT_QTD_PTR));
first_dummy_qtd) & EHCI_QH_NEXT_QTD_PTR);