drm/virtio: Set missing bo->attached flag

VirtIO-GPU driver now supports detachment of shmem BOs from host, but
doing it only for imported dma-bufs. Mark all shmem BOs as attached, not
just dma-bufs. This is a minor correction since detachment of a non-dmabuf
BOs not supported today.

Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Acked-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241129155357.2265357-1-dmitry.osipenko@collabora.com

drivers/gpu/drm/virtio/virtgpu_prime.c

@@ -250,7 +250,6 @@ static int virtgpu_dma_buf_init_obj(struct drm_device *dev,
 	virtio_gpu_cmd_resource_create_blob(vgdev, bo, &params,
 					    ents, nents);
 	bo->guest_blob = true;
-	bo->attached = true;
 
 	dma_buf_unpin(attach);
 	dma_resv_unlock(resv);

drivers/gpu/drm/virtio/virtgpu_vq.c

@@ -1300,6 +1300,9 @@ virtio_gpu_cmd_resource_create_blob(struct virtio_gpu_device *vgdev,
 
 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
 	bo->created = true;
+
+	if (nents)
+		bo->attached = true;
 }
 
 void virtio_gpu_cmd_set_scanout_blob(struct virtio_gpu_device *vgdev,