netdev - Re: Inconsistent lock state introduced by ipv6/addrconf change

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Message-ID: <20140404114848.GD13354@order.stressinduktion.org>
Date:	Fri, 4 Apr 2014 13:48:48 +0200
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	Shawn Guo <shawn.guo@...escale.com>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Stephen Hemminger <stephen@...workplumber.org>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: Inconsistent lock state introduced by ipv6/addrconf change

Hello!

On Fri, Apr 04, 2014 at 03:34:56PM +0800, Shawn Guo wrote:
> I'm running into an inconsistent lock state warning on the final v3.14
> kernel (-rc8 is good) on Freescale i.MX6 platform with fec driver
> (drivers/net/ethernet/freescale/fec_main.c).  The git bisect points
> the finger to commit c15b1cc (ipv6: move DAD and addrconf_verify
> processing to workqueue).  Reverting the commit does fix the problem
> for me.  The image is built from arch/arm/configs/imx_v6_v7_defconfig.
> 
> The interesting part is the same warning shows up on mainline tree until
> net-next gets merged with commit cd6362b.  That's why Olof's autobooter
> keeps reporting failure on hummingboard and wandboard (both i.MX6 based)
> since v3.14 release [1], but reports success after commit cd6362b.
> 
> We're less concerned by the mainline tree, since the problem disappeared
> now (nice to know why though).  But we do still want to fix it for 3.14
> stable kernel.

The patch which fixes this is already queued up for -stable:

http://patchwork.ozlabs.org/patch/335536/

Sorry for the inconvenience,

  Hannes


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