linux-kernel - Re: [PATCH] regulator: disable supply regulator if it is enabled for boot-on

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Message-ID: <503CB7A8.4050600@nvidia.com>
Date:	Tue, 28 Aug 2012 17:50:56 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	Rabin Vincent <rabin@....in>
CC:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	"lrg@...com" <lrg@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] regulator: disable supply regulator if it is enabled
 for boot-on

On Saturday 25 August 2012 05:10 AM, Rabin Vincent wrote:
> On Fri, Aug 24, 2012 at 11:22:05PM +0530, Laxman Dewangan wrote:
>> I tried to reproduce the issue but could not able to do this.
>> Can you please send me your board/dt files where you are porviding
>> platform data for regulator?
>> This will help me to reproduce the issue.
> Here's a dts patch:
>
Hi Rabin,

I tried to reproduce the lockup issue with the following change but not 
seeing any lockup issue.
I implement enable/disable for fixed regulator and printed the string as 
enable/disable
During registration I got the log as
[    0.349955] Registering the regulator vbat
[    0.354352] vbat: 3300 mV
[    0.357260] Registering the regulator vtest1
[    0.361810] fixed_enable(): Enabling vtest1
[    0.366144] vtest1: 3300 mV
[    0.369177] vtest1: supplied by vbat
::::::::::::::::

and when init_complete() get called then it happened as

[    1.509855] vtest1: disabling
[    1.512813] fixed_disable(): Disabling vtest1
[    1.517158] fixed_disable(): Disabling vbat
[    1.521342] vbat: disabling
[    1.524124] fixed_disable(): Disabling vbat

Also reviewing the change, I am not seeing any call trace where the 
recursive locking happening.

Please help to reproduce/understand the issue.

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