watchdog: softdog: use core reboot notifier

Get rid of the custom reboot notifier block registration and use the one
provided by the watchdog core.

Signed-off-by: Damien Riegel <damien.riegel@savoirfairelinux.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirlinux.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

1 files changed, 2 insertions, 28 deletions

diff --git a/drivers/watchdog/softdog.c b/drivers/watchdog/softdog.c
index 0dc5e323d59d..fe1e15137bf6 100644
--- a/drivers/watchdog/softdog.c
+++ b/drivers/watchdog/softdog.c
@@ -43,7 +43,6 @@
 #include <linux/types.h>
 #include <linux/timer.h>
 #include <linux/watchdog.h>
-#include <linux/notifier.h>
 #include <linux/reboot.h>
 #include <linux/init.h>
 #include <linux/jiffies.h>
@@ -122,26 +121,9 @@ static int softdog_set_timeout(struct watchdog_device *w, unsigned int t)
 }
 
 /*
- *      Notifier for system down
- */
-
-static int softdog_notify_sys(struct notifier_block *this, unsigned long code,
-        void *unused)
-{
-        if (code == SYS_DOWN || code == SYS_HALT)
-                /* Turn the WDT off */
-                softdog_stop(NULL);
-        return NOTIFY_DONE;
-}
-
-/*
  *      Kernel Interfaces
  */
 
-static struct notifier_block softdog_notifier = {
-        .notifier_call  = softdog_notify_sys,
-};
-
 static struct watchdog_info softdog_info = {
         .identity = "Software Watchdog",
         .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
@@ -175,18 +157,11 @@ static int __init watchdog_init(void)
         softdog_dev.timeout = soft_margin;
 
         watchdog_set_nowayout(&softdog_dev, nowayout);
-
-        ret = register_reboot_notifier(&softdog_notifier);
-        if (ret) {
-                pr_err("cannot register reboot notifier (err=%d)\n", ret);
-                return ret;
-        }
+        watchdog_stop_on_reboot(&softdog_dev);
 
         ret = watchdog_register_device(&softdog_dev);
-        if (ret) {
-                unregister_reboot_notifier(&softdog_notifier);
+        if (ret)
                 return ret;
-        }
 
         pr_info("Software Watchdog Timer: 0.08 initialized. soft_noboot=%d soft_margin=%d sec soft_panic=%d (nowayout=%d)\n",
                 soft_noboot, soft_margin, soft_panic, nowayout);
@@ -197,7 +172,6 @@ static int __init watchdog_init(void)
 static void __exit watchdog_exit(void)
 {
         watchdog_unregister_device(&softdog_dev);
-        unregister_reboot_notifier(&softdog_notifier);
 }
 
 module_init(watchdog_init);