Re: [PATCH] cpufreq: suspend/resume governors with PM notifiers

[Lan Tianyu <tianyu.lan@intel.com>]

On 11/18/2013 07:01 PM, Viresh Kumar wrote:
> On 18 November 2013 16:27, Lan Tianyu <tianyu.lan@intel.com> wrote:
>> How about introducing a resume/suspend callback pointer or list(if there
>> are several places that need to deal with cpu resume/suspend) in the
>> struct cpu and populate it in the cpufreq_add_dev()?
>>
>> The suspend/resume() of cpu_subsys needs to check the callback pointer
>> and run it if available.
>
> That's almost a new infrastructure then and looks more hackish :)

The resume/suspend() must be stored in the struct driver->pm? :)

> Apart from that even cpufreq would be a bit hacky as we don't really need
> per-cpu callbacks..
>

This maybe depends on where we want the issue to be fixed, right?
The cpufreq driver also can fix the issue if we run their cpu_driver 
resume/suspend callback earlier.

Another point, I just see cpuidle_resume() and cpuidle_pause() are 
called in the dpm_resume_noirq and dpm_suspend_noirq(). Not sure whether 
this can be applied to cpufreq.

-- 
Best Regards
Tianyu Lan