linux-kernel - Re: expected behavior of PF_PACKET on NETIF_F_HW_VLAN

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Date:	Fri, 02 Nov 2007 14:20:02 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	djohnson+linux-kernel@...starentnetworks.com
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	bguo@...starentnetworks.com, mchan@...adcom.com
Subject: Re: expected behavior of PF_PACKET on NETIF_F_HW_VLAN_RX device?

From: Dave Johnson <djohnson+linux-kernel@...starentnetworks.com>
Date: Fri, 2 Nov 2007 14:08:32 -0400

> These changes seems to cause this issue:
> 
> >  [BNX2]: Fix VLAN on ASF
> >  
> >  Always set up the device to strip incoming VLAN tags when ASF is
> >  enabled. ASF firmware will not parse packets correctly if VLAN tags
> >  are not stripped.
> >  
> >  Signed-off-by: Michael Chan <mchan@...adcom.com>
> >  Signed-off-by: David S. Miller <davem@...emloft.net>
> >  
> >  GIT: e29054f92d7d575631691865c1b95bee5bc974cc
> 
> and
> 
> > ChangeSet@...371.72.2, 2003-12-02 02:34:13-08:00, davem@...s.ninka.net +1 -0
> >   [TG3]: Do not set RX_MODE_KEEP_VLAN_TAG when ASF is enabled.
> 
> 
> Could you elaborate if this is really needed, if so is there some
> workaround that could be done instead?
> 
> Simply removing the check seemed to work for me, but I'm unsure if
> this is actually a valid thing to do with these MACs.

Unfortunately the ASF firmware is very picky.

I think were are stuck with this behavior.
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