netdev - Re: [net-next PATCH] e1000e: allow tx of pre-formatted vlan tagged packets

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Message-Id: <20090318.234102.202869351.davem@davemloft.net>
Date:	Wed, 18 Mar 2009 23:41:02 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	ajones@...erbed.com
Cc:	jeffrey.t.kirsher@...el.com, e1000-devel@...ts.sourceforge.net,
	netdev@...r.kernel.org, shemminger@...tta.com,
	alexander.h.duyck@...el.com
Subject: Re: [net-next PATCH] e1000e: allow tx of pre-formatted vlan tagged
 packets

From: Arthur Jones <ajones@...erbed.com>
Date: Tue, 17 Mar 2009 12:59:05 -0700

> As with igb, when the e1000e driver is fed 802.1q
> packets with hardware checksum on, it chokes with an
> error of the form:
> 
> checksum_partial proto=81!
> 
> As the logic there was not smart enough to look into
> the vlan header to pick out the encapsulated protocol.
> 
> There are times when we'd like to send these packets
> out without having to configure a vlan on the interface.
> Here we check for the vlan tag and allow the packet to
> go out with the correct hardware checksum.
> 
> Thanks to Kand Ly <kand@...erbed.com> for discovering the
> issue and the coming up with a solution.  This patch is
> based upon his work.
> 
> Fixups from Stephen Hemminger <shemminger@...tta.com> and
> Alexander Duyck <alexander.h.duyck@...el.com>.
> 
> Signed-off-by: Arthur Jones <ajones@...erbed.com>

Jeff K., you got this one too?
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