linux/lib/of-reconfig-notifier-error-inject.c
<<
>>
Prefs
   1// SPDX-License-Identifier: GPL-2.0-only
   2#include <linux/kernel.h>
   3#include <linux/module.h>
   4#include <linux/of.h>
   5
   6#include "notifier-error-inject.h"
   7
   8static int priority;
   9module_param(priority, int, 0);
  10MODULE_PARM_DESC(priority, "specify OF reconfig notifier priority");
  11
  12static struct notifier_err_inject reconfig_err_inject = {
  13        .actions = {
  14                { NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_ATTACH_NODE) },
  15                { NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_DETACH_NODE) },
  16                { NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_ADD_PROPERTY) },
  17                { NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_REMOVE_PROPERTY) },
  18                { NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_UPDATE_PROPERTY) },
  19                {}
  20        }
  21};
  22
  23static struct dentry *dir;
  24
  25static int err_inject_init(void)
  26{
  27        int err;
  28
  29        dir = notifier_err_inject_init("OF-reconfig",
  30                notifier_err_inject_dir, &reconfig_err_inject, priority);
  31        if (IS_ERR(dir))
  32                return PTR_ERR(dir);
  33
  34        err = of_reconfig_notifier_register(&reconfig_err_inject.nb);
  35        if (err)
  36                debugfs_remove_recursive(dir);
  37
  38        return err;
  39}
  40
  41static void err_inject_exit(void)
  42{
  43        of_reconfig_notifier_unregister(&reconfig_err_inject.nb);
  44        debugfs_remove_recursive(dir);
  45}
  46
  47module_init(err_inject_init);
  48module_exit(err_inject_exit);
  49
  50MODULE_DESCRIPTION("OF reconfig notifier error injection module");
  51MODULE_LICENSE("GPL");
  52MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");
  53