diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 94af418..3a8d0a2 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -132,9 +132,8 @@
 static inline void *dma_zalloc_coherent(struct device *dev, size_t size,
 					dma_addr_t *dma_handle, gfp_t flag)
 {
-	void *ret = dma_alloc_coherent(dev, size, dma_handle, flag);
-	if (ret)
-		memset(ret, 0, size);
+	void *ret = dma_alloc_coherent(dev, size, dma_handle,
+				       flag | __GFP_ZERO);
 	return ret;
 }