Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Received-SPF: Pass (protection.outlook.com: domain of xilinx.com designates
 149.199.62.198 as permitted sender) receiver=protection.outlook.com;
 client-ip=149.199.62.198; helo=xsj-pvapexch02.xlnx.xilinx.com;
Envelope-to: git@xilinx.com,
 linux@roeck-us.net,
 wim@linux-watchdog.org,
 linux-watchdog@vger.kernel.org,
 linux-kernel@vger.kernel.org
From:   Srinivas Neeli <srinivas.neeli@xilinx.com>
To:     <linux@roeck-us.net>, <shubhraj@xilinx.com>, <sgoud@xilinx.com>,
        <michal.simek@xilinx.com>
CC:     <wim@linux-watchdog.org>, <linux-watchdog@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>, <git@xilinx.com>,
        Srinivas Neeli <srinivas.neeli@xilinx.com>
Subject: [PATCH V2 4/5] watchdog: of_xilinx_wdt: Remove passing null pointer
Date:   Mon, 29 Mar 2021 21:49:38 +0530
Message-ID: <20210329161939.37680-5-srinivas.neeli@xilinx.com>
In-Reply-To: <20210329161939.37680-1-srinivas.neeli@xilinx.com>
References: <20210329161939.37680-1-srinivas.neeli@xilinx.com>
MIME-Version: 1.0
Content-Type: text/plain
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Mar 2021 16:20:17.0977
 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: eb99ee30-e123-42f8-13c9-08d8f2ce8a5f
X-MS-Exchange-CrossTenant-Id: 657af505-d5df-48d0-8300-c31994686c5c
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=657af505-d5df-48d0-8300-c31994686c5c;Ip=[149.199.62.198];Helo=[xsj-pvapexch02.xlnx.xilinx.com]
X-MS-Exchange-CrossTenant-AuthSource: CY1NAM02FT019.eop-nam02.prod.protection.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Anonymous
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN8PR02MB6001
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

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