linux-kernel - RE: [PATCH 13/14] regulator: check name in initialization of max8925

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Date:	Tue, 19 Apr 2011 01:28:23 -0700
From:	Haojian Zhuang <hzhuang1@...vell.com>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
CC:	Haojian Zhuang <haojian.zhuang@...il.com>,
	"sameo@...ux.intel.com" <sameo@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"dmitry.torokhov@...il.com" <dmitry.torokhov@...il.com>,
	"a.zummo@...ertech.it" <a.zummo@...ertech.it>,
	"johnpol@....mipt.ru" <johnpol@....mipt.ru>,
	"cbou@...l.ru" <cbou@...l.ru>,
	"dwmw2@...radead.org" <dwmw2@...radead.org>,
	"lrg@...mlogic.co.uk" <lrg@...mlogic.co.uk>
Subject: RE: [PATCH 13/14] regulator: check name in initialization of max8925



>-----Original Message-----
>From: Mark Brown [mailto:broonie@...nsource.wolfsonmicro.com]
>Sent: 2011年4月19日 4:09 PM
>To: Haojian Zhuang
>Cc: Haojian Zhuang; sameo@...ux.intel.com; linux-kernel@...r.kernel.org;
>dmitry.torokhov@...il.com; a.zummo@...ertech.it; johnpol@....mipt.ru;
>cbou@...l.ru; dwmw2@...radead.org; lrg@...mlogic.co.uk
>Subject: Re: [PATCH 13/14] regulator: check name in initialization of
>max8925
>
>On Mon, Apr 18, 2011 at 07:42:09PM -0700, Haojian Zhuang wrote:
>> 	Machine driver:
>> 		Platform data:
>> 			.regulator[0]	= xxx
>> 			.regulator[1]	= xxx
>
>> 	The index of regulator array is id of buck and ldo.
>> 	There's issue in max8925_core.c since we can't assume regulator[0]
>always declared in machine driver.
>
>What is the issue?  It's trivial to skip the regulator if the data is
>null.

It skiped all regulators if regulator[0] isn't decleared.
	(pdata == NULL) || (pdata->regulator[0] == NULL)

So it's a bug.