Eric Lee / smarc-fsl-linux-kernel

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lib/pm-notifier-error-inject.c 1.16 KB
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09c434b8a   Thomas Gleixner   treewide: Add SPD... 
1
 
  // SPDX-License-Identifier: GPL-2.0-only
048b9c354   Akinobu Mita   PM: PM notifier e... 
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  #include <linux/kernel.h>
  #include <linux/module.h>
  #include <linux/suspend.h>
  
  #include "notifier-error-inject.h"
  
  static int priority;
  module_param(priority, int, 0);
  MODULE_PARM_DESC(priority, "specify PM notifier priority");
  
  static struct notifier_err_inject pm_notifier_err_inject = {
  	.actions = {
  		{ NOTIFIER_ERR_INJECT_ACTION(PM_HIBERNATION_PREPARE) },
  		{ NOTIFIER_ERR_INJECT_ACTION(PM_SUSPEND_PREPARE) },
  		{ NOTIFIER_ERR_INJECT_ACTION(PM_RESTORE_PREPARE) },
  		{}
  	}
  };
  
  static struct dentry *dir;
  
  static int err_inject_init(void)
  {
  	int err;
  
  	dir = notifier_err_inject_init("pm", notifier_err_inject_dir,
  					&pm_notifier_err_inject, priority);
  	if (IS_ERR(dir))
  		return PTR_ERR(dir);
  
  	err = register_pm_notifier(&pm_notifier_err_inject.nb);
  	if (err)
  		debugfs_remove_recursive(dir);
  
  	return err;
  }
  
  static void err_inject_exit(void)
  {
  	unregister_pm_notifier(&pm_notifier_err_inject.nb);
  	debugfs_remove_recursive(dir);
  }
  
  module_init(err_inject_init);
  module_exit(err_inject_exit);
  
  MODULE_DESCRIPTION("PM notifier error injection module");
  MODULE_LICENSE("GPL");
  MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");