netdev - Re: [PATCH v2 net-next] ixgbe: Avoid unaligned access in ixgbe

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Message-ID: <20160314175909.GH5084@oracle.com>
Date:	Mon, 14 Mar 2016 13:59:09 -0400
From:	Sowmini Varadhan <sowmini.varadhan@...cle.com>
To:	Alexander Duyck <alexander.duyck@...il.com>
Cc:	intel-wired-lan <intel-wired-lan@...ts.osuosl.org>,
	Netdev <netdev@...r.kernel.org>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	"Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
	shannon nelson <shannon.nelson@...el.com>,
	Carolyn Wyborny <carolyn.wyborny@...el.com>,
	"Skidmore, Donald C" <donald.c.skidmore@...el.com>,
	Bruce W Allan <bruce.w.allan@...el.com>,
	John Ronciak <john.ronciak@...el.com>,
	Mitch Williams <mitch.a.williams@...el.com>
Subject: Re: [PATCH v2 net-next] ixgbe: Avoid unaligned access in ixgbe_atr()
 for LLC packets

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.

--Sowmini