lib/of-reconfig-notifier-error-inject.c

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