Re: [PATCH v2 2/2] intel_pstate: Set core to min P state during core offline

[Dirk Brandewie <dirk.brandewie@gmail.com>]

On 03/17/2014 10:44 PM, Viresh Kumar wrote:
> On Sat, Mar 15, 2014 at 2:33 AM,  <dirk.brandewie@gmail.com> wrote:
>> +
>>   static int intel_pstate_cpu_init(struct cpufreq_policy *policy)
>>   {
>>          struct cpudata *cpu;
>> @@ -818,7 +824,7 @@ static struct cpufreq_driver intel_pstate_driver = {
>>          .setpolicy      = intel_pstate_set_policy,
>>          .get            = intel_pstate_get,
>>          .init           = intel_pstate_cpu_init,
>> -       .exit           = intel_pstate_cpu_exit,
>> +       .stop           = intel_pstate_cpu_stop,
>
> Probably, keep exit as is and only change P-state in stop(). So that
> allocation of resources happen in init() and they are freed in exit()?
>
I looked at doing just that but it junked up the code.  if stop() is called
during PREPARE then init() will be called via __cpufreq_add_dev() in the ONLINE
and DOWN_FAILED case. So once stop() is called the driver will be ready for
init() to be called exactly like when exit() is called.