[Intel-wired-lan] [PATCH v2 net-next] ixgbe: Avoid unaligned access in ixgbe_atr() for LLC packets

[Alexander Duyck]

On Mon, Mar 14, 2016 at 10:59 AM, Sowmini Varadhan
<sowmini.varadhan at oracle.com> wrote:
> On (03/14/16 10:55), Alexander Duyck wrote:
>>
>> One other thing I forgot to mention is that we don't support ARP so
>> that check could be dropped.  The ATR code only supports IPv4 or IPv6
>> with TCP.
>
> I did notice that, but I left it in place because (a) it comes down
> the stack with the NET_IP_ALIGNment and (b) ARP is only sent over
> Ethernet II (there is no LLC SAP for ARP, which is a big reason
> why ipv4 is not sent over llc, despite rfc 1042).
>
> I figured it would not hurt to pass it down, in case we decide
> to do something clever with it in the future.

I figure it is better to just drop it since we don't need to be trying
to parse ARP packets anyway.

- Alex