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