drm/nouveau: fix dma_address check for CPU/GPU sync

[ Upstream commit d330099115597bbc238d6758a4930e72b49ea9ba ]

AGP for example doesn't have a dma_address array.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210614110517.1624-1-christian.koenig@amd.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 7daa12e..b4946b5 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -590,7 +590,7 @@ nouveau_bo_sync_for_device(struct nouveau_bo *nvbo)
        struct ttm_dma_tt *ttm_dma = (struct ttm_dma_tt *)nvbo->bo.ttm;
        int i;
 
-       if (!ttm_dma)
+       if (!ttm_dma || !ttm_dma->dma_address)
                return;
 
        /* Don't waste time looping if the object is coherent */
@@ -610,7 +610,7 @@ nouveau_bo_sync_for_cpu(struct nouveau_bo *nvbo)
        struct ttm_dma_tt *ttm_dma = (struct ttm_dma_tt *)nvbo->bo.ttm;
        int i;
 
-       if (!ttm_dma)
+       if (!ttm_dma || !ttm_dma->dma_address)
                return;
 
        /* Don't waste time looping if the object is coherent */