1 // SPDX-License-Identifier: GPL-2.0-only
2 #include <linux/kernel.h>
3 #include <linux/module.h>
4 #include <linux/of.h>
5 
6 #include "notifier-error-inject.h"
7 
8 static int priority;
9 module_param(priority, int, 0);
10 MODULE_PARM_DESC(priority, "specify OF reconfig notifier priority");
11 
12 static struct notifier_err_inject reconfig_err_inject = {
13 	.actions = {
14 		{ NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_ATTACH_NODE) },
15 		{ NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_DETACH_NODE) },
16 		{ NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_ADD_PROPERTY) },
17 		{ NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_REMOVE_PROPERTY) },
18 		{ NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_UPDATE_PROPERTY) },
19 		{}
20 	}
21 };
22 
23 static struct dentry *dir;
24 
25 static int err_inject_init(void)
26 {
27 	int err;
28 
29 	dir = notifier_err_inject_init("OF-reconfig",
30 		notifier_err_inject_dir, &reconfig_err_inject, priority);
31 	if (IS_ERR(dir))
32 		return PTR_ERR(dir);
33 
34 	err = of_reconfig_notifier_register(&reconfig_err_inject.nb);
35 	if (err)
36 		debugfs_remove_recursive(dir);
37 
38 	return err;
39 }
40 
41 static void err_inject_exit(void)
42 {
43 	of_reconfig_notifier_unregister(&reconfig_err_inject.nb);
44 	debugfs_remove_recursive(dir);
45 }
46 
47 module_init(err_inject_init);
48 module_exit(err_inject_exit);
49 
50 MODULE_DESCRIPTION("OF reconfig notifier error injection module");
51 MODULE_LICENSE("GPL");
52 MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");
53