Merge tag 'iommu-updates-v3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/joro...
[linux-3.10.git] / lib / pm-notifier-error-inject.c
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
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
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>");