linux-kernel - Re: [PATCH RESEND] mfd: mc13xxx: Fix null pointer dereference in mc13xxx_common

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Message-ID: <529C4527.3040707@gmail.com>
Date:	Mon, 02 Dec 2013 09:30:31 +0100
From:	Philippe Rétornaz <philippe.retornaz@...il.com>
To:	Alexander Shiyan <shc_work@...l.ru>
CC:	linux-kernel@...r.kernel.org, Samuel Ortiz <sameo@...ux.intel.com>,
	Sascha Hauer <kernel@...gutronix.de>,
	Shawn Guo <shawn.guo@...aro.org>,
	Lee Jones <lee.jones@...aro.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH RESEND] mfd: mc13xxx: Fix null pointer dereference in
 mc13xxx_common_init

Le 30/11/2013 10:53, Alexander Shiyan a écrit :
> If this driver being loaded from devicetree, the pdata is NULL. This
> cause kernel Oops when "fsl,mc13xxx-uses-codec" and/or
> "fsl,mc13xxx-uses-touch" properties is specified.
>

Well, the codec and touch are not supported if DT is used, thus why
bothering ? Just don't specify thoses properties.

IMHO it would be better to either implement full DT support in the
subdevices or removing the check for the fsl,mc13xxx-uses-codec and
fsl,mc13xxx-uses-touch in mc13xxx_probe_flags_dt().
If it's not supported let's not lie about it.


Regards,

Philippe
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