dma_fence_is_chain
WARN_ON(dma_fence_is_chain(fence));
} else if (dma_fence_is_chain(fence)) {
if (dma_fence_is_chain(job->fence)) {
if (!fence || !dma_fence_is_chain(fence))
return dma_fence_is_array(fence) || dma_fence_is_chain(fence);