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From: Guenter Roeck <linux@roeck-us.net>
To: Srinivas Neeli <srinivas.neeli@xilinx.com>,
	michal.simek@xilinx.com, shubhrajyoti.datta@xilinx.com,
	sgoud@xilinx.com
Cc: wim@linux-watchdog.org, linux-watchdog@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, git@xilinx.com
Subject: Re: [PATCH 8/9] watchdog: of_xilinx_wdt: Remove passing null pointer
Date: Mon, 15 Mar 2021 19:33:34 -0700
Message-ID: <fdb88aa1-35a5-d971-23b1-457354f4c3f1@roeck-us.net> (raw)
In-Reply-To: <1615805214-24857-9-git-send-email-srinivas.neeli@xilinx.com>

On 3/15/21 3:46 AM, Srinivas Neeli wrote:
> 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 | 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) {
> 


  reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-15 10:46 [PATCH 0/9] watchdog: of_xilinx_wdt: Update on xilinx watchdog driver Srinivas Neeli
2021-03-15 10:46 ` [PATCH 1/9] watchdog: of_xilinx_wdt: Add comment to spinlock Srinivas Neeli
2021-03-16  2:21   ` Guenter Roeck
2021-03-15 10:46 ` [PATCH 2/9] watchdog: of_xilinx_wdt: Used BIT macro Srinivas Neeli
2021-03-16  2:23   ` Guenter Roeck
2021-03-24  6:06     ` Srinivas Neeli
2021-03-15 10:46 ` [PATCH 3/9] watchdog: of_xilinx_wdt: Used dev_dbg() Srinivas Neeli
2021-03-16  2:27   ` Guenter Roeck
2021-03-15 10:46 ` [PATCH 4/9] watchdog: of_xilinx_wdt: Initialize watchdog via data structure Srinivas Neeli
2021-03-15 10:46 ` [PATCH 5/9] watchdog: of_xilinx_wdt: Introduce wdttype enum for identification Srinivas Neeli
2021-03-15 10:46 ` [PATCH 6/9] dt-bindings: watchdog: xilinx: Add binding for Versal watchdog Srinivas Neeli
2021-03-15 10:46 ` [PATCH 7/9] watchdog: of_xilinx_wdt: Add Versal Window watchdog support Srinivas Neeli
2021-03-16  2:31   ` Guenter Roeck
2021-03-24  6:04     ` Srinivas Neeli
2021-03-24 14:01       ` Guenter Roeck
2021-03-15 10:46 ` [PATCH 8/9] watchdog: of_xilinx_wdt: Remove passing null pointer Srinivas Neeli
2021-03-16  2:33   ` Guenter Roeck [this message]
2021-03-15 10:46 ` [PATCH 9/9] watchdog: of_xilinx_wdt: Skip printing pointer value Srinivas Neeli
2021-03-16  2:34   ` Guenter Roeck

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