staging: unisys: visorbus: cleanup error handling in visorbus_uevent

The add_uevent_var returns an error. Don't overwrite the error with
-ENOMEM, just pass the error code back up.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/visorbus/visorbus_main.c

@@ -82,9 +82,7 @@ visorbus_uevent(struct device *xdev, struct kobj_uevent_env *env)
 	dev = to_visor_device(xdev);
 	guid = visorchannel_get_uuid(dev->visorchannel);
 
-	if (add_uevent_var(env, "MODALIAS=visorbus:%pUl", &guid))
-		return -ENOMEM;
-	return 0;
+	return add_uevent_var(env, "MODALIAS=visorbus:%pUl", &guid);
 }
 
 /*