On 3/8/22 16:17, Dmitry Osipenko wrote: > @@ -246,20 +246,28 @@ static int virtio_gpu_plane_prepare_fb(struct drm_plane *plane, > struct virtio_gpu_device *vgdev = dev->dev_private; > struct virtio_gpu_framebuffer *vgfb; > struct virtio_gpu_object *bo; > + int err; > > if (!new_state->fb) > return 0; > > vgfb = to_virtio_gpu_framebuffer(new_state->fb); > bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]); > - if (!bo || (plane->type == DRM_PLANE_TYPE_PRIMARY && !bo->guest_blob)) > + > + err = virtio_gpu_gem_pin(bo); > + if (err) > + return err; I just noticed that this produces a refcount debug warning because I missed to initialize the refcount when BO is created. That warning splat was hidden by a huge lockdep splat produced by drm_aperture_remove_conflicting_pci_framebuffers(), which probably should be fixed. I'll correct it in v2.
