[PATCH] class_simple cleanup in input

Doesn't catch error on class_simple_add, and existing error return paths
forget to class_simple_destroy.

drivers/input/input.c

@@ -727,6 +727,8 @@ static int __init input_init(void)
 	int retval = -ENOMEM;
 
 	input_class = class_simple_create(THIS_MODULE, "input");
+	if (IS_ERR(input_class))
+		return PTR_ERR(input_class);
 	input_proc_init();
 	retval = register_chrdev(INPUT_MAJOR, "input", &input_fops);
 	if (retval) {
@@ -734,6 +736,7 @@ static int __init input_init(void)
 		remove_proc_entry("devices", proc_bus_input_dir);
 		remove_proc_entry("handlers", proc_bus_input_dir);
 		remove_proc_entry("input", proc_bus);
+		class_simple_destroy(input_class);
 		return retval;
 	}
 
@@ -743,6 +746,7 @@ static int __init input_init(void)
 		remove_proc_entry("handlers", proc_bus_input_dir);
 		remove_proc_entry("input", proc_bus);
 		unregister_chrdev(INPUT_MAJOR, "input");
+		class_simple_destroy(input_class);
 	}
 	return retval;
 }