drivers/watchdog: make use of devm_register_reboot_notifier()

Save a bit of cleanup code by leveraging newly added
devm_register_reboot_notifier().

[akpm@linux-foundation.org: small cleanup: avoid 80-col tricks]
Link: http://lkml.kernel.org/r/20170411160615.9784-1-andrew.smirnov@gmail.com
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 35 deletions

diff --git a/drivers/watchdog/watchdog_core.c b/drivers/watchdog/watchdog_core.c
index 74265b2f806c..8a8d952f8df9 100644
--- a/drivers/watchdog/watchdog_core.c
+++ b/drivers/watchdog/watchdog_core.c
@@ -137,25 +137,6 @@ int watchdog_init_timeout(struct watchdog_device *wdd,
 }
 EXPORT_SYMBOL_GPL(watchdog_init_timeout);
 
-static int watchdog_reboot_notifier(struct notifier_block *nb,
-				    unsigned long code, void *data)
-{
-	struct watchdog_device *wdd = container_of(nb, struct watchdog_device,
-						   reboot_nb);
-
-	if (code == SYS_DOWN || code == SYS_HALT) {
-		if (watchdog_active(wdd)) {
-			int ret;
-
-			ret = wdd->ops->stop(wdd);
-			if (ret)
-				return NOTIFY_BAD;
-		}
-	}
-
-	return NOTIFY_DONE;
-}
-
 static int watchdog_restart_notifier(struct notifier_block *nb,
 				     unsigned long action, void *data)
 {
@@ -244,19 +225,6 @@ static int __watchdog_register_device(struct watchdog_device *wdd)
 		}
 	}
 
-	if (test_bit(WDOG_STOP_ON_REBOOT, &wdd->status)) {
-		wdd->reboot_nb.notifier_call = watchdog_reboot_notifier;
-
-		ret = register_reboot_notifier(&wdd->reboot_nb);
-		if (ret) {
-			pr_err("watchdog%d: Cannot register reboot notifier (%d)\n",
-			       wdd->id, ret);
-			watchdog_dev_unregister(wdd);
-			ida_simple_remove(&watchdog_ida, wdd->id);
-			return ret;
-		}
-	}
-
 	if (wdd->ops->restart) {
 		wdd->restart_nb.notifier_call = watchdog_restart_notifier;
 
@@ -302,9 +270,6 @@ static void __watchdog_unregister_device(struct watchdog_device *wdd)
 	if (wdd->ops->restart)
 		unregister_restart_handler(&wdd->restart_nb);
 
-	if (test_bit(WDOG_STOP_ON_REBOOT, &wdd->status))
-		unregister_reboot_notifier(&wdd->reboot_nb);
-
 	watchdog_dev_unregister(wdd);
 	ida_simple_remove(&watchdog_ida, wdd->id);
 }