netdev - Re: [PATCH 4/6] net/macb: add RX checksum offload feature

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Date:	Fri, 18 Jul 2014 17:36:24 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Cyrille Pitchen <cyrille.pitchen@...el.com>
Cc:	nicolas.ferre@...el.com, davem@...emloft.net,
	linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
	soren.brinkmann@...inx.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/6] net/macb: add RX checksum offload feature

On Fri, 2014-07-18 at 16:21 +0200, Cyrille Pitchen wrote:
> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@...el.com>
> ---
>  drivers/net/ethernet/cadence/macb.c | 29 ++++++++++++++++++++++++++++-
>  drivers/net/ethernet/cadence/macb.h |  2 ++
>  2 files changed, 30 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
> index 9bdcd1b..6acd6e2 100644
> --- a/drivers/net/ethernet/cadence/macb.c
> +++ b/drivers/net/ethernet/cadence/macb.c
> @@ -766,6 +766,8 @@ static int gem_rx(struct macb *bp, int budget)
>  
>  		skb->protocol = eth_type_trans(skb, bp->dev);
>  		skb_checksum_none_assert(skb);
> +		if (bp->dev->features & NETIF_F_RXCSUM)
> +			skb->ip_summed = CHECKSUM_UNNECESSARY;
>  


Really ?

If this is what you meant, this deserves a big and fat comment.



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