--- zzzz-none-000/linux-4.4.60/drivers/base/dma-coherent.c	2017-04-08 07:53:53.000000000 +0000
+++ hawkeye-5590-729/linux-4.4.60/drivers/base/dma-coherent.c	2022-03-30 14:21:52.000000000 +0000
@@ -181,7 +181,7 @@
 	 */
 	*dma_handle = mem->device_base + (pageno << PAGE_SHIFT);
 	*ret = mem->virt_base + (pageno << PAGE_SHIFT);
-	memset(*ret, 0, size);
+	memset_io(*ret, 0, size);
 	spin_unlock_irqrestore(&mem->spinlock, flags);
 
 	return 1;