linux-kernel - Re: [PATCH v1 2/8] watchdog: f71808e_wdt: indicate WDIOF_CARDRESET support in watchdog

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Message-ID: <20200630205130.GA21689@roeck-us.net>
Date:   Tue, 30 Jun 2020 13:51:30 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Ahmad Fatoum <a.fatoum@...gutronix.de>
Cc:     Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Knud Poulsen <knpo@...e.org>, linux-watchdog@...r.kernel.org,
        kernel@...gutronix.de, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 2/8] watchdog: f71808e_wdt: indicate WDIOF_CARDRESET
 support in watchdog_info.options

On Thu, Jun 11, 2020 at 09:17:43PM +0200, Ahmad Fatoum wrote:
> The driver supports populating bootstatus with WDIOF_CARDRESET, but so
> far userspace couldn't portably determine whether absence of this flag
> meant no watchdog reset or no driver support. Or-in the bit to fix this.
> 
> Fixes: b97cb21a4634 ("watchdog: f71808e_wdt: Fix WDTMOUT_STS register read")
> Cc: stable@...r.kernel.org
> Signed-off-by: Ahmad Fatoum <a.fatoum@...gutronix.de>

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

> ---
>  drivers/watchdog/f71808e_wdt.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/watchdog/f71808e_wdt.c b/drivers/watchdog/f71808e_wdt.c
> index a3c44d75d80e..c8ce80c13403 100644
> --- a/drivers/watchdog/f71808e_wdt.c
> +++ b/drivers/watchdog/f71808e_wdt.c
> @@ -692,7 +692,8 @@ static int __init watchdog_init(int sioaddr)
>  	watchdog.sioaddr = sioaddr;
>  	watchdog.ident.options = WDIOC_SETTIMEOUT
>  				| WDIOF_MAGICCLOSE
> -				| WDIOF_KEEPALIVEPING;
> +				| WDIOF_KEEPALIVEPING
> +				| WDIOF_CARDRESET;
>  
>  	snprintf(watchdog.ident.identity,
>  		sizeof(watchdog.ident.identity), "%s watchdog",