watchdog: da9055: Don't update wdt_dev->timeout in da9055_wdt_set_timeout error path

AxelLin · Wim Van Sebroeck · commit 98e4a293895d · 2013-01-02T12:06:49.000+01:00
Otherwise, WDIOC_GETTIMEOUT returns wrong value if set_timeout fails.
This patch also removes unnecessary ret variable in da9055_wdt_ping function.

Signed-off-by: Axel Lin &lt;axel.lin@ingics.com&gt;
Signed-off-by: Wim Van Sebroeck &lt;wim@iguana.be&gt;
diff --git a/drivers/watchdog/da9055_wdt.c b/drivers/watchdog/da9055_wdt.c
@@ -72,20 +72,21 @@ static int da9055_wdt_set_timeout(struct watchdog_device *wdt_dev,
 					DA9055_TWDSCALE_MASK,
 					da9055_wdt_maps[i].reg_val <<
 					DA9055_TWDSCALE_SHIFT);
-	if (ret < 0)
+	if (ret < 0) {
 		dev_err(da9055->dev,
 			"Failed to update timescale bit, %d\n", ret);
+		return ret;
+	}
 
 	wdt_dev->timeout = timeout;
 
-	return ret;
+	return 0;
 }
 
 static int da9055_wdt_ping(struct watchdog_device *wdt_dev)
 {
 	struct da9055_wdt_data *driver_data = watchdog_get_drvdata(wdt_dev);
 	struct da9055 *da9055 = driver_data->da9055;
-	int ret;
 
 	/*
 	 * We have a minimum time for watchdog window called TWDMIN. A write
@@ -94,10 +95,8 @@ static int da9055_wdt_ping(struct watchdog_device *wdt_dev)
 	mdelay(DA9055_TWDMIN);
 
 	/* Reset the watchdog timer */
-	ret = da9055_reg_update(da9055, DA9055_REG_CONTROL_E,
-				DA9055_WATCHDOG_MASK, 1);
-
-	return ret;
+	return da9055_reg_update(da9055, DA9055_REG_CONTROL_E,
+				 DA9055_WATCHDOG_MASK, 1);
 }
 
 static void da9055_wdt_release_resources(struct kref *r)
