Re: [PATCH 2/4] drm/virtio: resource teardown tweaks

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> > -
> > -       drm_gem_shmem_free_object(obj);
> > +       if (bo->created) {
> > +               virtio_gpu_cmd_unref_resource(vgdev, bo);
> > +               /* completion handler calls virtio_gpu_cleanup_object() */
> nitpick: we don't need this comment when virtio_gpu_cmd_unref_cb is
> defined by this file and passed to virtio_gpu_cmd_unref_resource.

I want virtio_gpu_cmd_unref_cb + virtio_gpu_cmd_unref_resource being
placed next to each other so it is easier to see how they work hand in
hand.

> I happen to be looking at our error handling paths.  I think we want
> virtio_gpu_queue_fenced_ctrl_buffer to call vbuf->resp_cb on errors.

/me was thinking about that too.  Yes, we will need either that,
or a separate vbuf->error_cb callback.  That'll be another patch
though.

> > +       /*
> > +        * We are in the release callback and do NOT want refcount
> > +        * bo, so do NOT use virtio_gpu_array_add_obj().
> > +        */
> > +       vbuf->objs = virtio_gpu_array_alloc(1);
> > +       vbuf->objs->objs[0] = &bo->base.base
> This is an abuse of obj array.  Add "void *private_data;" to
> virtio_gpu_vbuffer and use that maybe?

I'd name that *cb_data, but yes, that makes sense.

cheers,
  Gerd

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