On Thu, 2012-11-08 at 18:18 -0800, Joseph Gasparakis wrote:
>  
>       if (skb->ip_summed == CHECKSUM_PARTIAL &&
>           skb_checksum_help(skb))
> @@ -902,6 +903,17 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff 
> *skb, struct net_device *dev
>                       tunnel->err_count = 0;
>       }
>  
> +     offset = skb->data - skb->head;
> +
> +     skb_reset_inner_mac_header(skb);
> +
> +     if (skb->network_header)
> +             skb_set_inner_network_header(skb, skb->network_header - offset);
> +
> +     if (skb->transport_header)
> +             skb_set_inner_transport_header(skb, skb->transport_header -
> +                                            offset);
> +
>       max_headroom = LL_RESERVED_SPACE(tdev) + gre_hlen + rt->dst.header_len;
>  
>       if (skb_headroom(skb) < max_headroom || skb_shared(skb)||

How it will be useful if skb_checksum_help(skb) will calculate csum? And
leaves nothing to offload 



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