UHCI_MAX_TD_NUM_PER_POOL
info->num_pools = num_tds / UHCI_MAX_TD_NUM_PER_POOL;
if (num_tds % UHCI_MAX_TD_NUM_PER_POOL) {
num = UHCI_MAX_TD_NUM_PER_POOL;
num = (num_tds % UHCI_MAX_TD_NUM_PER_POOL);