1 files changed, 27 insertions, 7 deletions

diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c
index 14f8a92fca12..270f4bf291e3 100644
--- a/drivers/watchdog/watchdog_dev.c
+++ b/drivers/watchdog/watchdog_dev.c
@@ -69,6 +69,7 @@ struct watchdog_core_data {
 	unsigned long status;		/* Internal status bits */
 #define _WDOG_DEV_OPEN		0	/* Opened ? */
 #define _WDOG_ALLOW_RELEASE	1	/* Did we receive the magic char ? */
+#define _WDOG_KEEPALIVE		2	/* Did we receive a keepalive ? */
 };
 
 /* the dev_t structure to store the dynamically allocated watchdog devices */
@@ -184,6 +185,8 @@ static int watchdog_ping(struct watchdog_device *wdd)
 	if (!watchdog_active(wdd) && !watchdog_hw_running(wdd))
 		return 0;
 
+	set_bit(_WDOG_KEEPALIVE, &wd_data->status);
+
 	wd_data->last_keepalive = jiffies;
 	return __watchdog_ping(wdd);
 }
@@ -223,6 +226,8 @@ static int watchdog_start(struct watchdog_device *wdd)
 	if (watchdog_active(wdd))
 		return 0;
 
+	set_bit(_WDOG_KEEPALIVE, &wd_data->status);
+
 	started_at = jiffies;
 	if (watchdog_hw_running(wdd) && wdd->ops->ping)
 		err = wdd->ops->ping(wdd);
@@ -286,10 +291,27 @@ static int watchdog_stop(struct watchdog_device *wdd)
 
 static unsigned int watchdog_get_status(struct watchdog_device *wdd)
 {
-	if (!wdd->ops->status)
-		return 0;
+	struct watchdog_core_data *wd_data = wdd->wd_data;
+	unsigned int status;
 
-	return wdd->ops->status(wdd);
+	if (wdd->ops->status)
+		status = wdd->ops->status(wdd);
+	else
+		status = wdd->bootstatus & (WDIOF_CARDRESET |
+					    WDIOF_OVERHEAT |
+					    WDIOF_FANFAULT |
+					    WDIOF_EXTERN1 |
+					    WDIOF_EXTERN2 |
+					    WDIOF_POWERUNDER |
+					    WDIOF_POWEROVER);
+
+	if (test_bit(_WDOG_ALLOW_RELEASE, &wd_data->status))
+		status |= WDIOF_MAGICCLOSE;
+
+	if (test_and_clear_bit(_WDOG_KEEPALIVE, &wd_data->status))
+		status |= WDIOF_KEEPALIVEPING;
+
+	return status;
 }
 
 /*
@@ -365,7 +387,7 @@ static ssize_t status_show(struct device *dev, struct device_attribute *attr,
 	status = watchdog_get_status(wdd);
 	mutex_unlock(&wd_data->lock);
 
-	return sprintf(buf, "%u\n", status);
+	return sprintf(buf, "0x%x\n", status);
 }
 static DEVICE_ATTR_RO(status);
 
@@ -433,9 +455,7 @@ static umode_t wdt_is_visible(struct kobject *kobj, struct attribute *attr,
 	struct watchdog_device *wdd = dev_get_drvdata(dev);
 	umode_t mode = attr->mode;
 
-	if (attr == &dev_attr_status.attr && !wdd->ops->status)
-		mode = 0;
-	else if (attr == &dev_attr_timeleft.attr && !wdd->ops->get_timeleft)
+	if (attr == &dev_attr_timeleft.attr && !wdd->ops->get_timeleft)
 		mode = 0;
 
 	return mode;