From: Viresh Kumar <viresh.kumar@st.com>
Date: Mon, 12 Mar 2012 04:21:56 +0000 (+0530)
Subject: watchdog: Add watchdog_active() routine
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=257f8c4aae392654d4ab846030b9f4518f16ed32;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

watchdog: Add watchdog_active() routine

Some watchdog may need to check if watchdog is ACTIVE or not, for example in
their suspend/resume hooks.

This patch adds this routine and changes the core drivers to use it.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
---

diff --git a/drivers/watchdog/via_wdt.c b/drivers/watchdog/via_wdt.c
index 5603e31afda..aa50da3ccfe 100644
--- a/drivers/watchdog/via_wdt.c
+++ b/drivers/watchdog/via_wdt.c
@@ -91,7 +91,7 @@ static inline void wdt_reset(void)
 static void wdt_timer_tick(unsigned long data)
 {
 	if (time_before(jiffies, next_heartbeat) ||
-	   (!test_bit(WDOG_ACTIVE, &wdt_dev.status))) {
+	   (!watchdog_active(&wdt_dev))) {
 		wdt_reset();
 		mod_timer(&timer, jiffies + WDT_HEARTBEAT);
 	} else
diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c
index 6c18a58cfd1..930cc7c8745 100644
--- a/drivers/watchdog/watchdog_dev.c
+++ b/drivers/watchdog/watchdog_dev.c
@@ -61,7 +61,7 @@ static struct watchdog_device *wdd;
 
 static int watchdog_ping(struct watchdog_device *wddev)
 {
-	if (test_bit(WDOG_ACTIVE, &wddev->status)) {
+	if (watchdog_active(wddev)) {
 		if (wddev->ops->ping)
 			return wddev->ops->ping(wddev);  /* ping the watchdog */
 		else
@@ -83,7 +83,7 @@ static int watchdog_start(struct watchdog_device *wddev)
 {
 	int err;
 
-	if (!test_bit(WDOG_ACTIVE, &wddev->status)) {
+	if (!watchdog_active(wddev)) {
 		err = wddev->ops->start(wddev);
 		if (err < 0)
 			return err;
@@ -113,7 +113,7 @@ static int watchdog_stop(struct watchdog_device *wddev)
 		return err;
 	}
 
-	if (test_bit(WDOG_ACTIVE, &wddev->status)) {
+	if (watchdog_active(wddev)) {
 		err = wddev->ops->stop(wddev);
 		if (err < 0)
 			return err;
diff --git a/include/linux/watchdog.h b/include/linux/watchdog.h
index ac40716b44e..1984ea61057 100644
--- a/include/linux/watchdog.h
+++ b/include/linux/watchdog.h
@@ -128,6 +128,12 @@ struct watchdog_device {
 #define WATCHDOG_NOWAYOUT_INIT_STATUS	0
 #endif
 
+/* Use the following function to check wether or not the watchdog is active */
+static inline bool watchdog_active(struct watchdog_device *wdd)
+{
+	return test_bit(WDOG_ACTIVE, &wdd->status);
+}
+
 /* Use the following function to set the nowayout feature */
 static inline void watchdog_set_nowayout(struct watchdog_device *wdd, bool nowayout)
 {