linux-kernel - [PATCH 8/9] watchdog: of_xilinx_wdt: Remove passing null pointer

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Message-ID: <1615805214-24857-9-git-send-email-srinivas.neeli@xilinx.com>
Date:   Mon, 15 Mar 2021 16:16:53 +0530
From:   Srinivas Neeli <srinivas.neeli@...inx.com>
To:     <linux@...ck-us.net>, <michal.simek@...inx.com>,
        <shubhrajyoti.datta@...inx.com>, <sgoud@...inx.com>
CC:     <wim@...ux-watchdog.org>, <linux-watchdog@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <git@...inx.com>,
        Srinivas Neeli <srinivas.neeli@...inx.com>
Subject: [PATCH 8/9] watchdog: of_xilinx_wdt: Remove passing null pointer

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@...inx.com>
---
 drivers/watchdog/of_xilinx_wdt.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/watchdog/of_xilinx_wdt.c b/drivers/watchdog/of_xilinx_wdt.c
index 3656e716b4f7..ad35c93b7684 100644
--- a/drivers/watchdog/of_xilinx_wdt.c
+++ b/drivers/watchdog/of_xilinx_wdt.c
@@ -520,6 +520,16 @@ 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;
 	}
 
 	if (wdttype == XWDT_WDT) {
@@ -554,16 +564,6 @@ 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;
-
 	if (wdttype == XWDT_WDT) {
 		rc = xwdt_selftest(xdev);
 		if (rc == XWT_TIMER_FAILED) {
-- 
2.7.4