linux-kernel - Re: [PATCH] watchdog: davinci: Handle return value of clk_prepare

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Message-ID: <20170607204906.GA29222@roeck-us.net>
Date:   Wed, 7 Jun 2017 13:49:06 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Arvind Yadav <arvind.yadav.cs@...il.com>
Cc:     wim@...ana.be, linux-watchdog@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] watchdog: davinci: Handle return value of
 clk_prepare_enable

On Tue, Jun 06, 2017 at 03:47:53PM +0530, Arvind Yadav wrote:
> clk_prepare_enable() can fail here and we must check its return value.
> 
> Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>

Reviewed-by: Guenter Roeck <linux@...ck-us.net>

> ---
>  drivers/watchdog/davinci_wdt.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/watchdog/davinci_wdt.c b/drivers/watchdog/davinci_wdt.c
> index 0e731d7..1ba9ead 100644
> --- a/drivers/watchdog/davinci_wdt.c
> +++ b/drivers/watchdog/davinci_wdt.c
> @@ -173,7 +173,11 @@ static int davinci_wdt_probe(struct platform_device *pdev)
>  		return PTR_ERR(davinci_wdt->clk);
>  	}
>  
> -	clk_prepare_enable(davinci_wdt->clk);
> +	ret = clk_prepare_enable(davinci_wdt->clk);
> +	if (ret) {
> +		dev_err(&pdev->dev, "failed to prepare clock\n");
> +		return ret;
> +	}
>  
>  	platform_set_drvdata(pdev, davinci_wdt);
>  
> -- 
> 1.9.1
> 
> --
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