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

Ulf Hansson
2017-02-21T15:28:16Z

[...]

>
>> > + /* 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