linux-kernel - Re: [PATCH 1/1] watchdog: imx2: Added ioctl options to enable/disable watchdog as wanted by systemd.

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Date:	Wed, 28 May 2014 09:11:15 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Tord Andersson <tord.o.andersson@...il.com>
Cc:	Wim Van Sebroeck <wim@...ana.be>, linux-watchdog@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Tord Andersson <tord.andersson@...ian.se>
Subject: Re: [PATCH 1/1] watchdog: imx2: Added ioctl options to
 enable/disable watchdog as wanted by systemd.

On Wed, May 28, 2014 at 04:59:56PM +0200, Tord Andersson wrote:
> When the current imx2 watchdog driver is used with the systemd watchdog feature,
> we get "Failed to enable hardware watchdog: Inappropriate ioctl for device".
> This is caused by missing ioctl setoptions to enable the watchdog.
> This patch will add WDIOC_SETOPTIONS for WDIOS_ENABLECARD and WDIOS_DISABLECARD.
> 
> Signed-off-by: Tord Andersson <tord.andersson@...ian.se>
> ---

Hi Tord,

This driver is in the process of being concerted to use the watchdog
core API. See 'watchdog: imx2_wdt: convert to watchdog core api' [1]
from Anatolij Gustschin.

With this update, this patch becomes unnecessary.

Guenter

[1] http://patchwork.roeck-us.net/patch/1340/

>  drivers/watchdog/imx2_wdt.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/drivers/watchdog/imx2_wdt.c b/drivers/watchdog/imx2_wdt.c
> index dd51d95..180c6a5 100644
> --- a/drivers/watchdog/imx2_wdt.c
> +++ b/drivers/watchdog/imx2_wdt.c
> @@ -196,6 +196,17 @@ static long imx2_wdt_ioctl(struct file *file, unsigned int cmd,
>  		new_value = val & IMX2_WDT_WRSR_TOUT ? WDIOF_CARDRESET : 0;
>  		return put_user(new_value, p);
>  
> +	case WDIOC_SETOPTIONS:
> +		if (get_user(new_value, p))
> +			return -EFAULT;
> +		if (new_value & WDIOS_ENABLECARD)
> +			imx2_wdt_start();
> +		else if (new_value & WDIOS_DISABLECARD)
> +			imx2_wdt_stop();
> +		else
> +			return -EINVAL;
> +		return 0;
> +
>  	case WDIOC_KEEPALIVE:
>  		imx2_wdt_ping();
>  		return 0;
> -- 
> 1.9.1
> 
> --
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