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

source code of linux/lib/pm-notifier-error-inject.c