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Date:   Wed, 19 Jul 2017 20:18:24 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     yanjiang.jin@...driver.com, wim@...ana.be
Cc:     jinyanjiang@...il.com, linux-watchdog@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] watchdog: imx2_wdt: use new_timeout value to override the
 old

On 07/19/2017 07:45 PM, yanjiang.jin@...driver.com wrote:
> From: Yanjiang Jin <yanjiang.jin@...driver.com>
> 
> Without this patch we couldn't change the timeout value of imx2_wdt.
> 
> Signed-off-by: Yanjiang Jin <yanjiang.jin@...driver.com>
> ---
>   drivers/watchdog/imx2_wdt.c | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/watchdog/imx2_wdt.c b/drivers/watchdog/imx2_wdt.c
> index 4874b0f..6cfeee6 100644
> --- a/drivers/watchdog/imx2_wdt.c
> +++ b/drivers/watchdog/imx2_wdt.c
> @@ -178,6 +178,9 @@ static int imx2_wdt_set_timeout(struct watchdog_device *wdog,
>   
>   	regmap_update_bits(wdev->regmap, IMX2_WDT_WCR, IMX2_WDT_WCR_WT,
>   			   WDOG_SEC_TO_COUNT(new_timeout));
> +
> +	wdog->timeout = new_timeout;
> +

I must be missing something. That very same code is already in line 177,
added with commit 30dd4a8f08b57 ("watchdog: imx2_wdt: also set wdog->timeout
to new_timeout") back in 2015.

Did you see this in an older kernel, maybe ?

Guenter

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