linux-kernel - Re: [PATCH 07/10] watchdog: keembay: Update the check in keembay_wdt

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Date:   Wed, 12 May 2021 07:02:03 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     shruthi.sanil@...el.com
Cc:     wim@...ux-watchdog.org, linux-watchdog@...r.kernel.org,
        linux-kernel@...r.kernel.org, andriy.shevchenko@...ux.intel.com,
        kris.pan@...ux.intel.com, mgross@...ux.intel.com,
        srikanth.thokala@...el.com, lakshmi.bai.raja.subramanian@...el.com,
        mallikarjunappa.sangannavar@...el.com
Subject: Re: [PATCH 07/10] watchdog: keembay: Update the check in
 keembay_wdt_resume()

On Wed, May 12, 2021 at 02:17:21PM +0530, shruthi.sanil@...el.com wrote:
> From: Shruthi Sanil <shruthi.sanil@...el.com>
> 
> Corrected the typo in the function keembay_wdt_resume, we need to
> enable the WDT if it is disabled/not active.
> 
> Fixes: fa0f8d51e90d ("watchdog: Add watchdog driver for Intel Keembay Soc")
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Tested-by: Kris Pan <kris.pan@...el.com>
> Signed-off-by: Shruthi Sanil <shruthi.sanil@...el.com>
> ---
>  drivers/watchdog/keembay_wdt.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/watchdog/keembay_wdt.c b/drivers/watchdog/keembay_wdt.c
> index dd192b8dff55..10896415f8c7 100644
> --- a/drivers/watchdog/keembay_wdt.c
> +++ b/drivers/watchdog/keembay_wdt.c
> @@ -260,7 +260,7 @@ static int __maybe_unused keembay_wdt_resume(struct device *dev)
>  {
>  	struct keembay_wdt *wdt = dev_get_drvdata(dev);
>  
> -	if (watchdog_active(&wdt->wdd))
> +	if (!watchdog_active(&wdt->wdd))

Have you tested this ? "watchdog_active" refers to the watchdog core state.
Your code now keeps the watchdog stopped after resume if it was running before,
and starts it if it wasn't. Please run through a suspend/resume cycle with
watchdog disabled and see what happens.

Guenter

>  		return keembay_wdt_start(&wdt->wdd);
>  
>  	return 0;
> -- 
> 2.17.1
>