linux-kernel - Re: [PATCH] watchdog: bcm_kona_wdt: Use correct return value for bcm_kona_wdt

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Date:   Mon, 25 May 2020 06:47:51 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Tiezhu Yang <yangtiezhu@...ngson.cn>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>
Cc:     bcm-kernel-feedback-list@...adcom.com,
        linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org,
        Xuefeng Li <lixuefeng@...ngson.cn>
Subject: Re: [PATCH] watchdog: bcm_kona_wdt: Use correct return value for
 bcm_kona_wdt_probe()

On 5/25/20 12:31 AM, Tiezhu Yang wrote:
> When call function devm_platform_ioremap_resource(), we should use IS_ERR()
> to check the return value and return PTR_ERR() if failed.
> 
> Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>

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

> ---
>  drivers/watchdog/bcm_kona_wdt.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/watchdog/bcm_kona_wdt.c b/drivers/watchdog/bcm_kona_wdt.c
> index eb850a8..8237c4e 100644
> --- a/drivers/watchdog/bcm_kona_wdt.c
> +++ b/drivers/watchdog/bcm_kona_wdt.c
> @@ -279,7 +279,7 @@ static int bcm_kona_wdt_probe(struct platform_device *pdev)
>  
>  	wdt->base = devm_platform_ioremap_resource(pdev, 0);
>  	if (IS_ERR(wdt->base))
> -		return -ENODEV;
> +		return PTR_ERR(wdt->base);
>  
>  	wdt->resolution = SECWDOG_DEFAULT_RESOLUTION;
>  	ret = bcm_kona_wdt_set_resolution_reg(wdt);
>