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authorDamien Riegel <damien.riegel@savoirfairelinux.com>2015-11-20 16:54:54 -0500
committerWim Van Sebroeck <wim@iguana.be>2015-12-13 15:56:02 +0100
commit28e805b44d52900fc5b05b35ef3945dc6db336a1 (patch)
tree68c66c723ca11de50054a803478bf384faeda920 /drivers/watchdog/gpio_wdt.c
parent5e1f976f43dc6b5903ee4b78536347b5004cefe4 (diff)
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watchdog: gpio_wdt: use core reboot notifier
Get rid of the custom reboot notifier block registration and use the one provided by the watchdog core. Note that this watchdog used to stop unconditionnaly on SYS_HALT and SYS_POWER_OFF. The core function now calls ops->stop on SYS_HALT and SYS_DOWN. To prevent the watchdog from being stopped on reboot, the "always-running" property must be set, otherwise it will now be stopped. Signed-off-by: Damien Riegel <damien.riegel@savoirfairelinux.com> Reviewed-by: Vivien Didelot <vivien.didelot@savoirlinux.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog/gpio_wdt.c')
-rw-r--r--drivers/watchdog/gpio_wdt.c35
1 files changed, 2 insertions, 33 deletions
diff --git a/drivers/watchdog/gpio_wdt.c b/drivers/watchdog/gpio_wdt.c
index 90d59d3f38a3..035c2387b846 100644
--- a/drivers/watchdog/gpio_wdt.c
+++ b/drivers/watchdog/gpio_wdt.c
@@ -12,10 +12,8 @@
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/module.h>
-#include <linux/notifier.h>
#include <linux/of_gpio.h>
#include <linux/platform_device.h>
-#include <linux/reboot.h>
#include <linux/watchdog.h>
#define SOFT_TIMEOUT_MIN 1
@@ -36,7 +34,6 @@ struct gpio_wdt_priv {
unsigned int hw_algo;
unsigned int hw_margin;
unsigned long last_jiffies;
- struct notifier_block notifier;
struct timer_list timer;
struct watchdog_device wdd;
};
@@ -126,26 +123,6 @@ static int gpio_wdt_set_timeout(struct watchdog_device *wdd, unsigned int t)
return gpio_wdt_ping(wdd);
}
-static int gpio_wdt_notify_sys(struct notifier_block *nb, unsigned long code,
- void *unused)
-{
- struct gpio_wdt_priv *priv = container_of(nb, struct gpio_wdt_priv,
- notifier);
-
- mod_timer(&priv->timer, 0);
-
- switch (code) {
- case SYS_HALT:
- case SYS_POWER_OFF:
- gpio_wdt_disable(priv);
- break;
- default:
- break;
- }
-
- return NOTIFY_DONE;
-}
-
static const struct watchdog_info gpio_wdt_ident = {
.options = WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING |
WDIOF_SETTIMEOUT,
@@ -224,23 +201,16 @@ static int gpio_wdt_probe(struct platform_device *pdev)
setup_timer(&priv->timer, gpio_wdt_hwping, (unsigned long)&priv->wdd);
+ watchdog_stop_on_reboot(&priv->wdd);
+
ret = watchdog_register_device(&priv->wdd);
if (ret)
return ret;
- priv->notifier.notifier_call = gpio_wdt_notify_sys;
- ret = register_reboot_notifier(&priv->notifier);
- if (ret)
- goto error_unregister;
-
if (priv->always_running)
gpio_wdt_start_impl(priv);
return 0;
-
-error_unregister:
- watchdog_unregister_device(&priv->wdd);
- return ret;
}
static int gpio_wdt_remove(struct platform_device *pdev)
@@ -248,7 +218,6 @@ static int gpio_wdt_remove(struct platform_device *pdev)
struct gpio_wdt_priv *priv = platform_get_drvdata(pdev);
del_timer_sync(&priv->timer);
- unregister_reboot_notifier(&priv->notifier);
watchdog_unregister_device(&priv->wdd);
return 0;