Sender: Guenter Roeck <groeck7@gmail.com>
Message-ID: <0106b656-9e86-271b-eda6-20ac7cb1792c@roeck-us.net>
Date:   Wed, 8 Feb 2023 19:33:28 -0800
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101
 Thunderbird/102.4.2
Subject: Re: [PATCH v3] watchdog: sbsa_wdog: Make sure the timeout programming
 is within the limits
Content-Language: en-US
To:     George Cherian <george.cherian@marvell.com>,
        wim@linux-watchdog.org, zhangshaokun@hisilicon.com
Cc:     linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org
References: <20230209021117.1512097-1-george.cherian@marvell.com>
From:   Guenter Roeck <linux@roeck-us.net>
In-Reply-To: <20230209021117.1512097-1-george.cherian@marvell.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 2/8/23 18:11, George Cherian wrote:
> Make sure to honour the max_hw_heartbeat_ms while programming the timeout
> value to WOR. Clamp the timeout passed to sbsa_gwdt_set_timeout() to
> make sure the programmed value is within the permissible range.
> 
> Fixes: abd3ac7902fb ("watchdog: sbsa: Support architecture version 1")
> 
> Signed-off-by: George Cherian <george.cherian@marvell.com>

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

> ---
>   drivers/watchdog/sbsa_gwdt.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/watchdog/sbsa_gwdt.c b/drivers/watchdog/sbsa_gwdt.c
> index 9791c74aebd4..63862803421f 100644
> --- a/drivers/watchdog/sbsa_gwdt.c
> +++ b/drivers/watchdog/sbsa_gwdt.c
> @@ -150,6 +150,7 @@ static int sbsa_gwdt_set_timeout(struct watchdog_device *wdd,
>   	struct sbsa_gwdt *gwdt = watchdog_get_drvdata(wdd);
>   
>   	wdd->timeout = timeout;
> +	timeout = clamp_t(unsigned int, timeout, 1, wdd->max_hw_heartbeat_ms / 1000);
>   
>   	if (action)
>   		sbsa_gwdt_reg_write(gwdt->clk * timeout, gwdt);