RAL_TX_DESC_SIZE
.bufsize = (RAL_FRAME_SIZE + RAL_TX_DESC_SIZE + 4),
if (m->m_pkthdr.len > (int)(RAL_FRAME_SIZE + RAL_TX_DESC_SIZE)) {
m->m_pkthdr.len = (RAL_FRAME_SIZE + RAL_TX_DESC_SIZE);
usbd_copy_in(pc, 0, &data->desc, RAL_TX_DESC_SIZE);
usbd_m_copy_in(pc, RAL_TX_DESC_SIZE, m, 0,
len = (RAL_TX_DESC_SIZE + m->m_pkthdr.len + 1) & ~1;