sh: dma: check return value of create_proc_read_entry()

create_proc_read_entry() may fail, if so return -ENOMEM.
Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/drivers/dma/dma-api.c

@@ -412,8 +412,8 @@ EXPORT_SYMBOL(unregister_dmac);
 static int __init dma_api_init(void)
 {
 	printk(KERN_NOTICE "DMA: Registering DMA API.\n");
-	create_proc_read_entry("dma", 0, 0, dma_read_proc, 0);
-	return 0;
+	return create_proc_read_entry("dma", 0, 0, dma_read_proc, 0)
+		    ? 0 : -ENOMEM;
 }
 subsys_initcall(dma_api_init);