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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 
  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>");
 52 

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