linux-kernel - Re: [PATCH] cpufreq: Fix cpufreq regression after suspend/resume

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Message-ID: <51DEC024.50603@linux.vnet.ibm.com>
Date:	Thu, 11 Jul 2013 19:54:36 +0530
From:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
To:	Lan Tianyu <lantianyu1986@...il.com>
CC:	Toralf Förster <toralf.foerster@....de>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	cpufreq@...r.kernel.org, Linux PM list <linux-pm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Jarzmik, Robert" <robert.jarzmik@...el.com>,
	"R, Durgadoss" <durgadoss.r@...el.com>,
	Dirk Brandewie <dirk.brandewie@...il.com>, tianyu.lan@...el.com
Subject: Re: [PATCH] cpufreq: Fix cpufreq regression after suspend/resume

On 07/11/2013 07:33 PM, Lan Tianyu wrote:
> 2013/7/11 Srivatsa S. Bhat <srivatsa.bhat@...ux.vnet.ibm.com>:
 
>> I tried to address all these in this patch, but you found yet another serious
>> loop-hole. I guess I'm out of ideas now... if anybody has any thoughts on how
>> to get this right, then I'm all ears. Else, we'll just revert the original
>> commit like Rafael suggested and leave it upto userspace to save and restore
>> the permissions across suspend/resume if it wants ;-(
>>
> 
> How about implement scaling driver's suspend/resume callback()? Although this
> needs to be dealt with case by case. If one's callbacks hasn't been implemented,
> it would have to follow current rule.
> 

Well, I'm now trying a slightly different approach at reorganizing the code,
and so far I think I'll be able to get it right this time. Let's see how it goes.

Regards,
Srivatsa S. Bhat

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