[PATCH 1/4] drm/amdgpu: always register an MMU notifier for userptr

[Alex Deucher]

On Thu, Nov 10, 2022 at 8:00 AM Christian König
<ckoenig.leichtzumerken at gmail.com> wrote:
>
> Since switching to HMM we always need that because we no longer grab
> references to the pages.
>
> Signed-off-by: Christian König <christian.koenig at amd.com>
> CC: stable at vger.kernel.org

Series is:
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> index 8ef31d687ef3..111484ceb47d 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> @@ -413,11 +413,9 @@ int amdgpu_gem_userptr_ioctl(struct drm_device *dev, void *data,
>         if (r)
>                 goto release_object;
>
> -       if (args->flags & AMDGPU_GEM_USERPTR_REGISTER) {
> -               r = amdgpu_mn_register(bo, args->addr);
> -               if (r)
> -                       goto release_object;
> -       }
> +       r = amdgpu_mn_register(bo, args->addr);
> +       if (r)
> +               goto release_object;
>
>         if (args->flags & AMDGPU_GEM_USERPTR_VALIDATE) {
>                 r = amdgpu_ttm_tt_get_user_pages(bo, bo->tbo.ttm->pages);
> --
> 2.34.1
>