UHCI_PTR_TERM
link = UHCI_PTR_TERM(uhci);
uhci->skel_async_qh->link = UHCI_PTR_TERM(uhci);
uhci->term_td->link = UHCI_PTR_TERM(uhci);
qh->element = UHCI_PTR_TERM(uhci);
qh->element = UHCI_PTR_TERM(uhci);
qh->link = UHCI_PTR_TERM(uhci);
if (qh_element(qh) == UHCI_PTR_TERM(uhci))
qh->element = UHCI_PTR_TERM(uhci);
else if (qh_element(qh) != UHCI_PTR_TERM(uhci))
if (qh_element(qh) == UHCI_PTR_TERM(uhci)) {
lqh->link = UHCI_PTR_TERM(uhci);