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
err_inject_init(void)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
err_inject_exit(void)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