linux-kernel - Re: [PATCH 13/24] mfd: fix dangling pointers

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Message-ID: <20100330124158.GJ29472@pengutronix.de>
Date:	Tue, 30 Mar 2010 14:41:58 +0200
From:	Wolfram Sang <w.sang@...gutronix.de>
To:	Samuel Ortiz <sameo@...ux.intel.com>
Cc:	kernel-janitors@...r.kernel.org, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: Re: [PATCH 13/24] mfd: fix dangling pointers

On Thu, Mar 25, 2010 at 11:41:38AM +0100, Samuel Ortiz wrote:
> Hi Wolfram,
> 
> On Sat, Mar 20, 2010 at 03:12:54PM +0100, Wolfram Sang wrote:
> > Fix I2C-drivers which missed setting clientdata to NULL before freeing the
> > structure it points to. Also fix drivers which do this _after_ the structure
> > was freed already.
> Patch applied, many thanks.

Thanks. Sadly some fixup will be needed:

We reached an agreement that a) setting the clientdata-pointer to NULL should
be done in the i2c-core [1] and b) how to do it. Based on that, I will do the
modification of the i2c-core for 2.6.34 (as it fixes the dangling pointers) and
then create one single patch removing the then superflous calls to
i2c_set_clientdata for 2.6.35 (as it is a cleanup). As you already applied the
above patch to your branch: you don't have to revert, we will fix it for you in
the next round.

Sorry for the detour!

Kind regards,

   Wolfram

[1] http://thread.gmane.org/gmane.linux.drivers.i2c/5674/focus=5729

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

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