[PATCH V2 4/5] watchdog: of_xilinx_wdt: Remove passing null pointer

[Srinivas Neeli <srinivas.neeli@xilinx.com>]

clk is an optional property, if clock not defined,
calling clk_prepare_enable() and devm_add_action_or_reset()
are not useful.
so calling these two apis only when clock is present.

Addresses-Coverity:"FORWARD_NULL"

Signed-off-by: Srinivas Neeli <srinivas.neeli@xilinx.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
---
 drivers/watchdog/of_xilinx_wdt.c | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/drivers/watchdog/of_xilinx_wdt.c b/drivers/watchdog/of_xilinx_wdt.c
index 5f31fdea517a..afbff79cce42 100644
--- a/drivers/watchdog/of_xilinx_wdt.c
+++ b/drivers/watchdog/of_xilinx_wdt.c
@@ -211,6 +211,15 @@ static int xwdt_probe(struct platform_device *pdev)
 				 "The watchdog clock freq cannot be obtained\n");
 	} else {
 		pfreq = clk_get_rate(xdev->clk);
+		rc = clk_prepare_enable(xdev->clk);
+		if (rc) {
+			dev_err(dev, "unable to enable clock\n");
+			return rc;
+		}
+		rc = devm_add_action_or_reset(dev, xwdt_clk_disable_unprepare,
+					      xdev->clk);
+		if (rc)
+			return rc;
 	}
 
 	/*
@@ -224,16 +233,6 @@ static int xwdt_probe(struct platform_device *pdev)
 	spin_lock_init(&xdev->spinlock);
 	watchdog_set_drvdata(xilinx_wdt_wdd, xdev);
 
-	rc = clk_prepare_enable(xdev->clk);
-	if (rc) {
-		dev_err(dev, "unable to enable clock\n");
-		return rc;
-	}
-	rc = devm_add_action_or_reset(dev, xwdt_clk_disable_unprepare,
-				      xdev->clk);
-	if (rc)
-		return rc;
-
 	rc = xwdt_selftest(xdev);
 	if (rc == XWT_TIMER_FAILED) {
 		dev_err(dev, "SelfTest routine error\n");
-- 
2.9.1