Re: [PATCH v1] Revert "drm/virtio: Allow importing prime buffers when 3D is enabled"

[Yiwei Zhang]

On Fri, Sep 11, 2026 at 7:42 AM Dmitry Osipenko
<dmitry.osipenko@xxxxxxxxxxxxx> wrote:
>
> Guest userspace may import udmabuf to vrend. Vrend doesn't support guest
> blobs, and thus, further 3d operations with the imported blob are failing.
> Typical scenario of the problem shown with mouse cursor RGBA image imported
> into virtio-gpu, which previously was rejected by virtio-gpu driver.
> Revert enabling guest blobs importing into vrend to fix the regression.
>
> Link: https://gitlab.freedesktop.org/virgl/virglrenderer/-/work_items/674
> Fixes: df4dc947c46b ("drm/virtio: Allow importing prime buffers when 3D is enabled")
> Signed-off-by: Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx>
> ---
>  drivers/gpu/drm/virtio/virtgpu_prime.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/virtio/virtgpu_prime.c b/drivers/gpu/drm/virtio/virtgpu_prime.c
> index 149e6bcb5878..ebf471044d06 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_prime.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_prime.c
> @@ -349,7 +349,7 @@ struct drm_gem_object *virtgpu_gem_prime_import(struct drm_device *dev,
>                 }
>         }
>
> -       if (!vgdev->has_resource_blob)
> +       if (!vgdev->has_resource_blob || vgdev->has_virgl_3d)
>                 return drm_gem_prime_import(dev, buf);
>
>         bo = kzalloc_obj(*bo);
> --
> 2.55.0
>

r-b. Thanks for the prompt revert!