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diff --git a/kernel/nvidia/nv-dma.c b/kernel/nvidia/nv-dma.c
index 73cdeed..e691014 100644
--- a/kernel/nvidia/nv-dma.c
+++ b/kernel/nvidia/nv-dma.c
@@ -606,7 +606,7 @@ static NvBool nv_dma_is_map_resource_implemented
#if defined(NV_DMA_MAP_RESOURCE_PRESENT)
const struct dma_map_ops *ops = get_dma_ops(&nvl->dev->dev);
- return (ops->map_resource != NULL);
+ return (ops && ops->map_resource);
#else
return NV_FALSE;
#endif
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