--- zzzz-none-000/linux-2.6.32.61/drivers/spi/spi.c	2013-06-10 09:43:48.000000000 +0000
+++ ar9-7330-650/linux-2.6.32.61/drivers/spi/spi.c	2015-04-09 11:31:23.000000000 +0000
@@ -563,10 +563,7 @@
  */
 void spi_unregister_master(struct spi_master *master)
 {
-	int dummy;
-
-	dummy = device_for_each_child(master->dev.parent, &master->dev,
-					__unregister);
+	device_for_each_child(master->dev.parent, &master->dev, __unregister);
 	device_unregister(&master->dev);
 }
 EXPORT_SYMBOL_GPL(spi_unregister_master);