watchdog card may be initially disabled

[Denys Vlasenko]

On Sunday 19 April 2009 19:22, 八戒哥哥 wrote:
> The watchdog card may be initially disabled by BIOS.
> 
> Executing 'watchdog -T 3 -t 1 /dev/watchdog' and
> 
> 'kill -9 `pidof watchdog`' will not work, the machine will still run happyly.
> 
> you must exeute these commands twice to make watchdog take effect.
> 
> I cannot find a 'WDIOS_ENABLECARD' ioctl in busybox-1.13.3/miscutils/watchdog.c.
> 
> The only ioctl operation is 'WDIOC_SETTIMEOUT'.
> 
>  59         htimer_duration = htimer_duration / 1000;
>  60         ioctl_or_warn(3, WDIOC_SETTIMEOUT, &htimer_duration);
> 
> I suggest to add a 'WDIOC_SETOPTIONS' ioctl before 'WDIOC_SETTIMEOUT',
> 
> then, we can be sure the watchdog card is enabled.
> 
> +58         ioctl_or_warn(3, WDIOC_SETOPTIONS, WDIOS_ENABLECARD);
> 
>   59         htimer_duration = htimer_duration / 1000;
>   60         ioctl_or_warn(3, WDIOC_SETTIMEOUT, &htimer_duration);


Please test this patch.
--
vda
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