Re: [PATCH v3 1/8] driver core: add a faux bus for use when a simple device/bus is needed

Greg Kroah-Hartman
2025-02-07T09:13:43Z

On Thu, Feb 06, 2025 at 03:07:59PM -0500, Lyude Paul wrote:
> On Thu, 2025-02-06 at 19:08 +0100, Thomas Weißschuh wrote:
> > > +
> > > + device_initialize(dev);
> > > + dev->release = faux_device_release;
> > > + dev->parent = &faux_bus_root;
> >
> > I guess nobody will want to hang these off a different parent.
>
> Oh - this is a good point that slipped my mind, how would we want to handle
> this case? The reason I ask is since we have things like
> drivers/gpu/drm/display/drm_dp_aux_dev.c which currently use the virtual
> device API but iirc do actually assign the DRM device owning the aux device as
> the parent.

Having a parent is fine, I just hadn't found any users of that yet.
I'll go add that option for v4.

thanks,

greg k-h