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
8 static int priority;
9 module_param(priority, int, 0);
10 MODULE_PARM_DESC(priority, "specify PM notifier priority");
11
12 static 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
21 static struct dentry *dir;
22
23 static int err_inject_init(void)
24 {
25 int err;
26
27 dir = notifier_err_inject_init("pm", notifier_err_inject_dir,
28 &pm_notifier_err_inject, priority);
29 if (IS_ERR(dir))
30 return PTR_ERR(dir);
31
32 err = register_pm_notifier(&pm_notifier_err_inject.nb);
33 if (err)
34 debugfs_remove_recursive(dir);
35
36 return err;
37 }
38
39 static void err_inject_exit(void)
40 {
41 unregister_pm_notifier(&pm_notifier_err_inject.nb);
42 debugfs_remove_recursive(dir);
43 }
44
45 module_init(err_inject_init);
46 module_exit(err_inject_exit);
47
48 MODULE_DESCRIPTION("PM notifier error injection module");
49 MODULE_LICENSE("GPL");
50 MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");
51
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