EHCI_QTD_GET_BYTES
s, EHCI_QTD_GET_TOGGLE(s), EHCI_QTD_GET_BYTES(s),
if (EHCI_QTD_GET_BYTES(status) != 0)
EHCI_QTD_GET_BYTES(status) == 0)
actlen += sqtd->len - EHCI_QTD_GET_BYTES(status);