drm/virtio: set non-cross device blob uuid_state

Blob resources without the cross device flag don't have a uuid to share
with other virtio devices. When exporting such blobs, set uuid_state to
STATE_ERR so that virtgpu_virtio_get_uuid doesn't hang.
Signed-off-by: David Stevens <stevensd@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20210811040401.1264234-1-stevensd@chromium.orgSigned-off-by: Gerd Hoffmann <kraxel@redhat.com>

drivers/gpu/drm/virtio/virtgpu_prime.c

@@ -98,6 +98,8 @@ struct dma_buf *virtgpu_gem_prime_export(struct drm_gem_object *obj,
 		} else {
 			bo->uuid_state = STATE_ERR;
 		}
+	} else if (!(bo->blob_flags & VIRTGPU_BLOB_FLAG_USE_CROSS_DEVICE)) {
+		bo->uuid_state = STATE_ERR;
 	}
 
 	exp_info.ops = &virtgpu_dmabuf_ops.ops;