Re: [PATCH] pmdomain: arm: Fix debugfs node creation failure

[Sibi Sankar]

On 8/15/24 19:16, Sudeep Holla wrote:
> On Thu, Aug 15, 2024 at 12:46:15PM +0200, Ulf Hansson wrote:
> > On Wed, 14 Aug 2024 at 15:31, Sudeep Holla <sudeep.holla@xxxxxxx> wrote:
> > > On Wed, Aug 14, 2024 at 02:38:24PM +0200, Ulf Hansson wrote:
> > > > Sudeep, while I understand your point and I agree with it, it's really
> > > > a simple fix that $subject patch is proposing. As the unique name
> > > > isn't mandated by the SCMI spec, it looks to me that we should make a
> > > > fix for it on the Linux side.
> > >
> > > Yes, I did come to the conclusion that this is inevitable but hadn't
> > > thought much on the exact solution. This email and you merging the original
> > > patch made me think a bit quickly now 😉
> >
> > Alright, great!
> >
> > > > I have therefore decided to queue up $subject patch for fixes. Please
> > > > let me know if you have any other proposals/objections moving forward.
> > >
> > > The original patch may not work well with the use case Peng presented.
> > > As the name and id may also match in their case, I was wondering if we
> > > need to add some prefix like perf- or something to avoid the potential
> > > clash across power and perf genpds ? I may be missing something still as
> > > it is hard to visualise all possible case that can happen with variety
> > > of platform and their firmware.
> > >
> > > In short, happy to have some fix for the issue in some form whichever
> > > works for wider set of platforms.
> >
> > Okay, so I have dropped the $subject patch from my fixes branch for
> > now, to allow us and Sibi to come up with an improved approach.
> >
> > That said, it looks to me that the proper fix needs to involve
> > pm_genpd_init() in some way, as this problem with unique device naming
> > isn't really limited to SCMI. Normally we use an "ida" to get a unique
> > index that we tag on to the device's name, but maybe there is a better
> > strategy here!?
>
> Yes using "ida" for unique index might work here as well AFAIU. It can be
> one of the possible solution for sure.

Just re-spun it with ida, I've also shared how the output looks
with those additional device ids added to the device name. Have
a look at it when you get time.

-Sibi

>