[PATCH 2/5] drm/debugfs: disallow debugfs access when device isn't registered

[Andi Shyti]

> > > During device bringup it might be that we can't access the debugfs files.
> > > Return -ENODEV until the registration is completed on access.
> > just wondering, if the device is not registered, how do we get
> > there?
> 
> The workflow is:
> 1. Creation (DRM)
> 2. Initialization (Driver)
> 3. Registration (DRM)
> ...
> 4. Unregistration (DRM)
> 5. Deinitialization (Driver)
> 6. Destruction (DRM)
> 
> It is possible that debugfs files are created during driver initialization,
> but Daniel insisted that they should not be accessible until the
> registration is done (which makes the other UAPI accessible as well).

makes sense, but then why not -EAGAIN, or -EBUSY?

Thanks,
Andi