linux-kernel - Re: [PATCH] watchdog: armada_37xx_wdt: Fix .set

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Message-ID: <20220924105145.spzn32xvz6mvyksi@pali>
Date:   Sat, 24 Sep 2022 12:51:45 +0200
From:   Pali Rohár <pali@...nel.org>
To:     Marek Behún <kabel@...nel.org>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>
Cc:     linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] watchdog: armada_37xx_wdt: Fix .set_timeout callback

PING?

On Tuesday 26 July 2022 10:56:12 Pali Rohár wrote:
> ioctl(WDIOC_SETTIMEOUT) calls .set_timeout and .ping callbacks and it is
> expected that it changes current watchdog timeout.
> 
> armada_37xx_wdt's .ping callback just reping counter 0 and does not touch
> counter 1 used for timeout. So it is needed to set counter 1 to the new
> value in .set_timeout callback to ensure ioctl(WDIOC_SETTIMEOUT)
> functionality. Fix it.
> 
> Fixes: 54e3d9b518c8 ("watchdog: Add support for Armada 37xx CPU watchdog")
> Signed-off-by: Pali Rohár <pali@...nel.org>
> ---
>  drivers/watchdog/armada_37xx_wdt.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/watchdog/armada_37xx_wdt.c b/drivers/watchdog/armada_37xx_wdt.c
> index 1635f421ef2c..b84cba94b135 100644
> --- a/drivers/watchdog/armada_37xx_wdt.c
> +++ b/drivers/watchdog/armada_37xx_wdt.c
> @@ -179,6 +179,8 @@ static int armada_37xx_wdt_set_timeout(struct watchdog_device *wdt,
>  	dev->timeout = (u64)dev->clk_rate * timeout;
>  	do_div(dev->timeout, CNTR_CTRL_PRESCALE_MIN);
>  
> +	set_counter_value(dev, CNTR_ID_WDOG, dev->timeout);
> +
>  	return 0;
>  }
>  
> -- 
> 2.20.1
>