diff options
Diffstat (limited to 'drivers/watchdog/watchdog_dev.c')
| -rw-r--r-- | drivers/watchdog/watchdog_dev.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c index d5d2bbd8f428..4bc7ab60b12c 100644 --- a/drivers/watchdog/watchdog_dev.c +++ b/drivers/watchdog/watchdog_dev.c @@ -80,6 +80,9 @@ static struct watchdog_core_data *old_wd_data; static struct workqueue_struct *watchdog_wq; +static bool handle_boot_enabled = + IS_ENABLED(CONFIG_WATCHDOG_HANDLE_BOOT_ENABLED); + static inline bool watchdog_need_worker(struct watchdog_device *wdd) { /* All variables in milli-seconds */ @@ -956,9 +959,14 @@ static int watchdog_cdev_register(struct watchdog_device *wdd, dev_t devno) * and schedule an immediate ping. */ if (watchdog_hw_running(wdd)) { - __module_get(wdd->ops->owner); - kref_get(&wd_data->kref); - queue_delayed_work(watchdog_wq, &wd_data->work, 0); + if (handle_boot_enabled) { + __module_get(wdd->ops->owner); + kref_get(&wd_data->kref); + queue_delayed_work(watchdog_wq, &wd_data->work, 0); + } else { + pr_info("watchdog%d running and kernel based pre-userspace handler disabled\n", + wdd->id); + } } return 0; @@ -1106,3 +1114,8 @@ void __exit watchdog_dev_exit(void) class_unregister(&watchdog_class); destroy_workqueue(watchdog_wq); } + +module_param(handle_boot_enabled, bool, 0444); +MODULE_PARM_DESC(handle_boot_enabled, + "Watchdog core auto-updates boot enabled watchdogs before userspace takes over (default=" + __MODULE_STRING(IS_ENABLED(CONFIG_WATCHDOG_HANDLE_BOOT_ENABLED)) ")"); |