cxgbit_skcb_tx_extralen
len += cxgbit_skcb_tx_extralen(skb);
cxgbit_skcb_tx_extralen(skb);
cxgbit_skcb_tx_extralen(skb) = (num_pdu *
cxgbit_skcb_tx_extralen(skb) =
cxgbit_skcb_tx_extralen(skb) = cxgbit_digest_len[
cxgbit_skcb_tx_extralen(skb) = cxgbit_digest_len[submode];