linux/lib/pm-notifier-error-inject.c
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   1#include <linux/kernel.h>
   2#include <linux/module.h>
   3#include <linux/suspend.h>
   4
   5#include "notifier-error-inject.h"
   6
   7static int priority;
   8module_param(priority, int, 0);
   9MODULE_PARM_DESC(priority, "specify PM notifier priority");
  10
  11static 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
  20static struct dentry *dir;
  21
  22static 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
  38static void err_inject_exit(void)
  39{
  40        unregister_pm_notifier(&pm_notifier_err_inject.nb);
  41        debugfs_remove_recursive(dir);
  42}
  43
  44module_init(err_inject_init);
  45module_exit(err_inject_exit);
  46
  47MODULE_DESCRIPTION("PM notifier error injection module");
  48MODULE_LICENSE("GPL");
  49MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");
  50
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