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Date:	Fri, 4 Apr 2014 23:09:59 +0800
From:	Shawn Guo <shawn.guo@...escale.com>
To:	<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

On Fri, Apr 04, 2014 at 01:48:48PM +0200, Hannes Frederic Sowa wrote:
> 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/

Thanks for the pointer.

Shawn

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