linux-kernel - Re: [PATCH 18/24] rtc: fix dangling pointers

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Message-ID: <20100330124932.GM29472@pengutronix.de>
Date:	Tue, 30 Mar 2010 14:49:32 +0200
From:	Wolfram Sang <w.sang@...gutronix.de>
To:	kernel-janitors@...r.kernel.org
Cc:	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
	Paul Gortmaker <p_gortmaker@...oo.com>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	rtc-linux@...glegroups.com
Subject: Re: [PATCH 18/24] rtc: fix dangling pointers

On Sat, Mar 20, 2010 at 03:12:59PM +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.
> 
> Signed-off-by: Wolfram Sang <w.sang@...gutronix.de>
> Cc: Paul Gortmaker <p_gortmaker@...oo.com>
> Cc: Alessandro Zummo <a.zummo@...ertech.it>

please drop this this patch. 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). If 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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