diff --git a/arch/mn10300/mm/dma-alloc.c b/arch/mn10300/mm/dma-alloc.c
index 4e34880bea03..159acb02cfd4 100644
--- a/arch/mn10300/mm/dma-alloc.c
+++ b/arch/mn10300/mm/dma-alloc.c
@@ -25,7 +25,8 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
 	unsigned long addr;
 	void *ret;
 
-	printk("dma_alloc_coherent(%s,%zu,,%x)\n", dev_name(dev), size, gfp);
+	pr_debug("dma_alloc_coherent(%s,%zu,%x)\n",
+		 dev ? dev_name(dev) : "?", size, gfp);
 
 	if (0xbe000000 - pci_sram_allocated >= size) {
 		size = (size + 255) & ~255;