XHCI_ENDPOINT_POLLED
ASSERT(xep->xep_state & XHCI_ENDPOINT_POLLED);
ASSERT(!(xep->xep_state & XHCI_ENDPOINT_POLLED));
xep->xep_state |= XHCI_ENDPOINT_POLLED;
ASSERT(xep->xep_state & XHCI_ENDPOINT_POLLED);
xep->xep_state &= ~XHCI_ENDPOINT_POLLED;