cpcs_trailer
struct cpcs_trailer *trailer;
trailer = (struct cpcs_trailer*)((u_char *)skb->data +
(skb->len - sizeof(struct cpcs_trailer))))
(iadev->tx_buf_sz - sizeof(struct cpcs_trailer))){
struct cpcs_trailer *cpcs;
struct cpcs_trailer *trailer;
total_len = skb->len + sizeof(struct cpcs_trailer);
buf_desc_ptr->buf_start_lo) + total_len - sizeof(struct cpcs_trailer);
wr_ptr->bytes = sizeof(struct cpcs_trailer);
if ((!skb)||(skb->len>(iadev->tx_buf_sz-sizeof(struct cpcs_trailer))))
struct cpcs_trailer *cpcs;