Source of nsh.c - linux-imx - PHYTEC BitBucket (Stash)

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    if (unlikely(!pskb_may_pull(skb, nsh_len)))
        goto out;
​
    proto = tun_p_to_eth_p(nsh_hdr(skb)->np);
    if (!proto)
        goto out;
​
    __skb_pull(skb, nsh_len);
​
    skb_reset_mac_header(skb);
    skb_reset_mac_len(skb);
    skb->mac_len = proto == htons(ETH_P_TEB) ? ETH_HLEN : 0;
    skb->protocol = proto;
​
    features &= NETIF_F_SG;
    segs = skb_mac_gso_segment(skb, features);
    if (IS_ERR_OR_NULL(segs)) {
        skb_gso_error_unwind(skb, htons(ETH_P_NSH), nsh_len,
                     skb->network_header - nhoff,
                     mac_len);
        goto out;
    }