Re: [PATCH V2 4/6] PM / domain: Register for PM QOS performance notifier

From	Ulf Hansson <ulf.hansson@linaro.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH V2 4/6] PM / domain: Register for PM QOS performance notifier
Date	2017-02-21 16:30 +0100
Message-ID	<tdky6-4nq-13@gated-at.bofh.it> (permalink)
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[...]

>
>> > +   /* Propagate only if this domain has a single parent */
>>
>> Why?  This limitation should be explained in the cover letter and
>> changelog.  I would also expect some sort of WARN here since this could
>> otherwise be a rather silent failures.
>
> I think this limitation can just be removed, but I am confused a bit.
>
> I thought that support for multiple parent domains isn't yet there,
> isn't it? And that few people are trying to add it in kernel and the
> stuff is still under review. Like this thread:

A genpd PM domain can have several parents (or to use the genpd
terminology, masters).

This is different from allowing a device to be attached to more than
one PM domains, which is what I think you are referring to. That isn't
supported.

>
> https://lkml.org/lkml/2016/11/22/792
>
> --
> viresh

Kind regards
Uffe

Thread

Re: [PATCH V2 4/6] PM / domain: Register for PM QOS performance notifier Kevin Hilman <khilman@baylibre.com> - 2017-02-18 01:10 +0100
  Re: [PATCH V2 4/6] PM / domain: Register for PM QOS performance  notifier Viresh Kumar <viresh.kumar@linaro.org> - 2017-02-20 06:10 +0100
    Re: [PATCH V2 4/6] PM / domain: Register for PM QOS performance notifier Ulf Hansson <ulf.hansson@linaro.org> - 2017-02-21 16:30 +0100
      Re: [PATCH V2 4/6] PM / domain: Register for PM QOS performance  notifier Viresh Kumar <viresh.kumar@linaro.org> - 2017-02-22 04:30 +0100

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