[Nouveau] [PATCH] drm/nouveau: fix dma_address check for CPU/GPU sync

[Christian König]

Ping? Does anybody wants to give me an rb or acked-by?

AGP is basically broken on nouveu without this.

Christian.

Am 14.06.21 um 13:05 schrieb Christian König:
> AGP for example doesn't have a dma_address array.
>
> Signed-off-by: Christian König <christian.koenig at amd.com>
> ---
>   drivers/gpu/drm/nouveau/nouveau_bo.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
> index 3e09df0472ce..170aba99a110 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_bo.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
> @@ -546,7 +546,7 @@ nouveau_bo_sync_for_device(struct nouveau_bo *nvbo)
>   	struct ttm_tt *ttm_dma = (struct ttm_tt *)nvbo->bo.ttm;
>   	int i, j;
>   
> -	if (!ttm_dma)
> +	if (!ttm_dma || !ttm_dma->dma_address)
>   		return;
>   	if (!ttm_dma->pages) {
>   		NV_DEBUG(drm, "ttm_dma 0x%p: pages NULL\n", ttm_dma);
> @@ -582,7 +582,7 @@ nouveau_bo_sync_for_cpu(struct nouveau_bo *nvbo)
>   	struct ttm_tt *ttm_dma = (struct ttm_tt *)nvbo->bo.ttm;
>   	int i, j;
>   
> -	if (!ttm_dma)
> +	if (!ttm_dma || !ttm_dma->dma_address)
>   		return;
>   	if (!ttm_dma->pages) {
>   		NV_DEBUG(drm, "ttm_dma 0x%p: pages NULL\n", ttm_dma);