TD_FLAG_FREE
uhci_polledp->uhci_polled_td->flag = TD_FLAG_FREE;
td->flag = TD_FLAG_FREE;
dummy_td->flag = TD_FLAG_FREE;
if (uhcip->uhci_td_pool_addr[index].flag == TD_FLAG_FREE) {
uhcip->uhci_td_pool_addr[i].flag = TD_FLAG_FREE;
if ((flag != TD_FLAG_FREE) &&
dummy_td->flag = TD_FLAG_FREE;