linux-kernel - Re: [BUG] 2.6.29-rc* QinQ vlan trunking regression

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Message-Id: <20090304.212108.19011543.davem@davemloft.net>
Date:	Wed, 04 Mar 2009 21:21:08 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	bart@...ie.net
Cc:	kaber@...sh.net, greearb@...delatech.com, shemminger@...tta.com,
	dada1@...mosbay.com, frank.blaschka@...ibm.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [BUG] 2.6.29-rc* QinQ vlan trunking regression

From: Bart Trojanowski <bart@...ie.net>
Date: Wed, 4 Mar 2009 23:54:42 -0500

> David,
> 
> * David Miller <davem@...emloft.net> [090304 22:53]:
> > vlan: Fix vlan-in-vlan crashes.
> > 
> > As analyzed by Patrick McHardy, vlan needs to reset it's
> > netdev_ops pointer in it's ->init() function but this
> > leaves the compat method pointers stale.
> > 
> > Add a netdev_resync_ops() and call it from the vlan code.
> <snip>
> >  include/linux/netdevice.h |    1 +
> >  net/8021q/vlan_dev.c      |    1 +
> >  net/core/dev.c            |   54 +++++++++++++++++++++++++++-----------------
> >  3 files changed, 35 insertions(+), 21 deletions(-)
> 
> I tried this patch onto v2.6.29-rc7-3-g559595a, but I still get a crash.
> I assume that this worked for you, so I am not putting much faith in my
> results at this late hour.  I'll confirm tomorrow morning that it's not
> something else.

I didn't test, so you the bug must be a different problem or
my patch is wrong :)

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