netdev - RE: rtl8168e-vl dropping tftp ack

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Date:	Fri, 19 Apr 2013 11:27:11 +0800
From:	hayeswang <hayeswang@...ltek.com>
To:	'Francois Romieu' <romieu@...zoreil.com>,
	'Stefan Bader' <stefan.bader@...onical.com>
CC:	<netdev@...r.kernel.org>, 'nic_swsd' <nic_swsd@...ltek.com>
Subject: RE: rtl8168e-vl dropping tftp ack

Francois Romieu [mailto:romieu@...zoreil.com] 
> Sent: Friday, April 19, 2013 5:55 AM
> To: Stefan Bader
> Cc: netdev@...r.kernel.org; nic_swsd
> Subject: Re: rtl8168e-vl dropping tftp ack
> 
[...]
> +		if (unlikely(skb->len < ETH_ZLEN &&
> +		    (tp->mac_version == RTL_GIGA_MAC_VER_34))) {
> +			if (skb_padto(skb, ETH_ZLEN))
> +				return false;
> +			skb_checksum_help(skb);
> +			skb_put(skb, ETH_ZLEN - skb->len);
> +			return true;
> +		}
> +

I don't think the hw checksum is enabled, because there are many successful
small packets before the failure. However, I also want to know if any skb->len <
60 occurs, so I think the checking should be included by the other case.
 
Best Regards,
Hayes

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