Re: [RFC PATCH] PM / Domains: Ensure subdomain is not in use before removing

[Jon Hunter <jonathanh@nvidia.com>]

Hi Geert,

On 27/08/15 12:37, Geert Uytterhoeven wrote:
> Hi Jon,
> 
> On Thu, Aug 27, 2015 at 11:21 AM, Jon Hunter <jonathanh@nvidia.com> wrote:
>> The function pm_genpd_remove_subdomain() removes a subdomain from a
>> generic PM domain, however, it does not check if the subdomain has any
>> slave domains or device attached before doing so. Therefore, add a test
>> to verify that the subdomain does not have any slave domains associated
>> or any device attached before removing.
> 
> So far no-one ran into this, as there are no callers of
> pm_genpd_remove_subdomain() in mainline or -next.
> 
> Do you plan to add a caller?

Yes exactly. However, given that the API was present I thought why not
fix it now or at least get some feedback on this.

I have also noticed that there is no function to remove a pm-domain (ie.
reverse of pm_genpd_init()). I assume that currently people add
pm-domains and never remove them, which makes sense, however the
scenario I am trying to solve is allowing the registering of pm-domains
to be deferred if something is not yet present (ie. a regulator).

Cheers
Jon

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