[PATCH 04/12] drm/ttm: use ttm put pages function to properly restore cache attribute

[Thomas Hellstrom]

Reviewed-by: Thomas Hellstrom <thellstrom at vmware.com>

On 11/08/2011 12:40 AM, j.glisse at gmail.com wrote:
> From: Jerome Glisse<jglisse at redhat.com>
>
> On failure we need to make sure the page we free has wb cache
> attribute. Do this pas call the proper ttm page helper function.
>
> Signed-off-by: Jerome Glisse<jglisse at redhat.com>
> Reviewed-by: Konrad Rzeszutek Wilk<konrad.wilk at oracle.com>
> ---
>   drivers/gpu/drm/ttm/ttm_tt.c |    5 ++++-
>   1 files changed, 4 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
> index 8b7a6d0..3fb4c6d 100644
> --- a/drivers/gpu/drm/ttm/ttm_tt.c
> +++ b/drivers/gpu/drm/ttm/ttm_tt.c
> @@ -89,7 +89,10 @@ static struct page *__ttm_tt_get_page(struct ttm_tt *ttm, int index)
>   	}
>   	return p;
>   out_err:
> -	put_page(p);
> +	INIT_LIST_HEAD(&h);
> +	list_add(&p->lru,&h);
> +	ttm_put_pages(&h, 1, ttm->page_flags,
> +		      ttm->caching_state,&ttm->dma_address[index]);
>   	return NULL;
>   }
>
>