linux/lib/of-reconfig-notifier-error-inject.c
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   1#include <linux/kernel.h>
   2#include <linux/module.h>
   3#include <linux/of.h>
   4
   5#include "notifier-error-inject.h"
   6
   7static int priority;
   8module_param(priority, int, 0);
   9MODULE_PARM_DESC(priority, "specify OF reconfig notifier priority");
  10
  11static 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
  22static struct dentry *dir;
  23
  24static 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
  40static void err_inject_exit(void)
  41{
  42        of_reconfig_notifier_unregister(&reconfig_err_inject.nb);
  43        debugfs_remove_recursive(dir);
  44}
  45
  46module_init(err_inject_init);
  47module_exit(err_inject_exit);
  48
  49MODULE_DESCRIPTION("OF reconfig notifier error injection module");
  50MODULE_LICENSE("GPL");
  51MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");
  52
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