linux-kernel - Re: [PATCH 5/5] cpufreq: use correct values of cpus in __cpufreq_remove_dev

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Message-ID: <CAKohpo=_bhaws44_XEf=DEjbVtiRfYHeMm-cK=bHo1Sed14kAg@mail.gmail.com>
Date:	Tue, 17 Sep 2013 21:48:08 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Stephen Warren <swarren@...dotorg.org>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
	Lists linaro-kernel <linaro-kernel@...ts.linaro.org>,
	Patch Tracking <patches@...aro.org>,
	"cpufreq@...r.kernel.org" <cpufreq@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 5/5] cpufreq: use correct values of cpus in __cpufreq_remove_dev_finish()

On 17 September 2013 20:50, Stephen Warren <swarren@...dotorg.org> wrote:
> On 09/11/2013 11:25 PM, Viresh Kumar wrote:
>> This broke after a recent change "cedb70a cpufreq: Split __cpufreq_remove_dev()
>> into two parts" from Srivatsa..
>>
>> Consider a scenario where we have two CPUs in a policy (0 & 1) and we are
>> removing cpu 1. On the call to __cpufreq_remove_dev_prepare() we have cleared 1
>> from policy->cpus and now on a call to __cpufreq_remove_dev_finish() we read
>> cpumask_weight of policy->cpus, which will come as 1 and this code will behave
>> as if we are removing the last cpu from policy :)
>>
>> Fix it by clearing cpu mask in __cpufreq_remove_dev_finish() instead of
>> __cpufreq_remove_dev_prepare().
>
> I see this patch isn't in linux-next yet, nor did it make 3.12-rc1. I
> assume it'll make 3.12-rc2? It solves various CPU hotplug and
> suspend/resume issues for me.

Yes, I have asked Rafael to get this in for rc2 and few others too..
Waiting for his reply though..

--
viresh
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