On Tue, Apr 1, 2025 at 5:39 AM Dmitry Osipenko
<dmitry.osipe...@collabora.com> wrote:
>
> The vfpriv->ctx_id is always initialized to a non-zero value. Check whether
> context was created before attaching GEM to this context ID. This left
> unnoticed previously because host silently skips attachment if context
> doesn't exist, still we shouldn't do that for consistency.
>
> Fixes: 086b9f27f0ab ("drm/virtio: Don't create a context with default param
> if context_init is supported")
> Cc: <sta...@vger.kernel.org> # v6.14+
> Signed-off-by: Dmitry Osipenko <dmitry.osipe...@collabora.com>
Reviewed-by: Rob Clark <robdcl...@gmail.com>
> ---
> drivers/gpu/drm/virtio/virtgpu_gem.c | 11 ++++++-----
> 1 file changed, 6 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/virtio/virtgpu_gem.c
> b/drivers/gpu/drm/virtio/virtgpu_gem.c
> index 5aab588fc400..3d6aa26fdb53 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_gem.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_gem.c
> @@ -115,13 +115,14 @@ int virtio_gpu_gem_object_open(struct drm_gem_object
> *obj,
> if (!vgdev->has_context_init)
> virtio_gpu_create_context(obj->dev, file);
>
> - objs = virtio_gpu_array_alloc(1);
> - if (!objs)
> - return -ENOMEM;
> - virtio_gpu_array_add_obj(objs, obj);
> + if (vfpriv->context_created) {
> + objs = virtio_gpu_array_alloc(1);
> + if (!objs)
> + return -ENOMEM;
> + virtio_gpu_array_add_obj(objs, obj);
>
> - if (vfpriv->ctx_id)
> virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id,
> objs);
> + }
>
> out_notify:
> virtio_gpu_notify(vgdev);
> --
> 2.49.0
>
