From: Willem de Bruijn <willemdebruijn.ker...@gmail.com>
Date: Tue, 8 Aug 2017 14:22:55 -0400
> From: Willem de Bruijn <will...@google.com>
>
> skb_warn_bad_offload triggers a warning when an skb enters the GSO
> stack at __skb_gso_segment that does not have CHECKSUM_PARTIAL
> checksum offload set.
>
> Commit b2504a5dbef3 ("net: reduce skb_warn_bad_offload() noise")
> observed that SKB_GSO_DODGY producers can trigger the check and
> that passing those packets through the GSO handlers will fix it
> up. But, the software UFO handler will set ip_summed to
> CHECKSUM_NONE.
>
> When __skb_gso_segment is called from the receive path, this
> triggers the warning again.
>
> Make UFO set CHECKSUM_UNNECESSARY instead of CHECKSUM_NONE. On
> Tx these two are equivalent. On Rx, this better matches the
> skb state (checksum computed), as CHECKSUM_NONE here means no
> checksum computed.
>
> See also this thread for context:
> http://patchwork.ozlabs.org/patch/799015/
>
> Fixes: b2504a5dbef3 ("net: reduce skb_warn_bad_offload() noise")
> Signed-off-by: Willem de Bruijn <will...@google.com>
Applied and queued up for -stable, thank you.
