linux-kernel - Re: [Bug #12805] QinQ vlan trunking regression

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Message-Id: <20090314.150420.149174658.davem@davemloft.net>
Date:	Sat, 14 Mar 2009 15:04:20 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	rjw@...k.pl
Cc:	linux-kernel@...r.kernel.org, kernel-testers@...r.kernel.org,
	bart@...ie.net, netdev@...r.kernel.org
Subject: Re: [Bug #12805] QinQ vlan trunking regression

From: "Rafael J. Wysocki" <rjw@...k.pl>
Date: Sat, 14 Mar 2009 20:05:33 +0100 (CET)

> This message has been generated automatically as a part of a report
> of recent regressions.
> 
> The following bug entry is on the current list of known regressions
> from 2.6.28.  Please verify if it still should be listed and let me know
> (either way).
> 
> 
> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=12805
> Subject		: QinQ vlan trunking regression
> Submitter	: Bart Trojanowski <bart@...ie.net>
> Date		: 2009-02-28 18:05 (15 days old)
> References	: http://marc.info/?l=linux-kernel&m=123584439115868&w=4

Fixed by:

commit 9d40bbda599def1e1d155d7f7dca14fe8744bd2b
Author: David S. Miller <davem@...emloft.net>
Date:   Wed Mar 4 23:46:25 2009 -0800

    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.
    
    Any other driver which changes ->netdev_ops after register_netdevice()
    will need to call this new function after doing so too.
    
    With help from Patrick McHardy.
    
    Tested-by: Patrick McHardy <kaber@...sh.net>
    Signed-off-by: David S. Miller <davem@...emloft.net>

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