[PATCH] drm/ttm: wait for eviction in ttm_bo_force_list_clean

[Alex Deucher]

On Wed, Jun 22, 2016 at 8:16 AM, Christian König
<deathsimple at vodafone.de> wrote:
> From: Christian König <christian.koenig at amd.com>
>
> Now that we can pipeline evictions we need to wait for
> them to finish when we cleanup a memory domain.
>
> Signed-off-by: Christian König <christian.koenig at amd.com>

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

> ---
>  drivers/gpu/drm/ttm/ttm_bo.c | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
> index 5d93169..e340d0d6 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -1287,6 +1287,7 @@ static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
>  {
>         struct ttm_mem_type_manager *man = &bdev->man[mem_type];
>         struct ttm_bo_global *glob = bdev->glob;
> +       struct fence *fence;
>         int ret;
>
>         /*
> @@ -1307,6 +1308,23 @@ static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
>                 spin_lock(&glob->lru_lock);
>         }
>         spin_unlock(&glob->lru_lock);
> +
> +       spin_lock(&man->move_lock);
> +       fence = fence_get(man->move);
> +       spin_unlock(&man->move_lock);
> +
> +       if (fence) {
> +               ret = fence_wait(fence, false);
> +               fence_put(fence);
> +               if (ret) {
> +                       if (allow_errors) {
> +                               return ret;
> +                       } else {
> +                               pr_err("Cleanup eviction failed\n");
> +                       }
> +               }
> +       }
> +
>         return 0;
>  }
>
> --
> 2.5.0
>
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