linux-kernel - Re: [PATCH] watchdog: f71808e_wdt: Add check for platform_driver

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Date:   Fri, 22 Jul 2022 07:12:02 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     williamsukatube@....com, wim@...ux-watchdog.org,
        linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     William Dean <williamsukatube@...il.com>,
        Hacash Robot <hacashRobot@...tino.com>
Subject: Re: [PATCH] watchdog: f71808e_wdt: Add check for
 platform_driver_register

On 7/22/22 02:25, williamsukatube@....com wrote:
> From: William Dean <williamsukatube@...il.com>
> 
> As platform_driver_register() could fail, it should be better
> to deal with the return value in order to maintain the code
> consisitency.
> 
> Fixes: 27e0fe00a5c61 ("watchdog: f71808e_wdt: refactor to platform device/driver pair")
> Reported-by: Hacash Robot <hacashRobot@...tino.com>
> Signed-off-by: William Dean <williamsukatube@...il.com>

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

> ---
>   drivers/watchdog/f71808e_wdt.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/watchdog/f71808e_wdt.c b/drivers/watchdog/f71808e_wdt.c
> index 7f59c680de25..6a16d3d0bb1e 100644
> --- a/drivers/watchdog/f71808e_wdt.c
> +++ b/drivers/watchdog/f71808e_wdt.c
> @@ -634,7 +634,9 @@ static int __init fintek_wdt_init(void)
>   
>   	pdata.type = ret;
>   
> -	platform_driver_register(&fintek_wdt_driver);
> +	ret = platform_driver_register(&fintek_wdt_driver);
> +	if (ret)
> +		return ret;
>   
>   	wdt_res.name = "superio port";
>   	wdt_res.flags = IORESOURCE_IO;