Re: [PATCH v11 02/20] gpu: nova-core: gsp: Extract usable FB region from GSP

[David Airlie]

On Wed, Apr 22, 2026 at 12:55 AM Joel Fernandes <joelagnelf@xxxxxxxxxx> wrote:
>
> On Thu, Apr 16, 2026 at 04:26:48PM -0700, John Hubbard wrote:
> > On 4/15/26 2:05 PM, Joel Fernandes wrote:
> > ...
> >
> > Apologies, I found one more minor thing, while looking at a
> > subsequent patch in this series:
> >
> > >  impl MessageFromGsp for GetGspStaticInfoReply {
> > >      const FUNCTION: MsgFunction = MsgFunction::GetGspStaticInfo;
> > >      type Message = GspStaticConfigInfo;
> > > -    type InitError = Infallible;
> > > +    type InitError = Error;
> > >
> > >      fn read(
> > >          msg: &Self::Message,
> > > @@ -205,6 +209,7 @@ fn read(
> > >      ) -> Result<Self, Self::InitError> {
> > >          Ok(GetGspStaticInfoReply {
> > >              gpu_name: msg.gpu_name_str(),
> > > +            usable_fb_region: msg.first_usable_fb_region().ok_or(ENODEV)?,
> >
> > OK, failing out is correct here. But in addition, we should also
> > log this at dev_err!() level. This is rare, surprising, and actionable,
> > so perfect for that level of logging.
>
> Sure, that works for me. Will add it in for v12.

Just fyi when we get to spark later this will not matter, we will have
no usable_fb_region, though maybe it could just return 0s in that
case.

Dave.