Dose the watchdog actually work ??
What happens when you get into a infinite loop when interrupts are
turned off?
On Wed, 2003-06-04 at 09:10, Matthias Fuchs wrote:
> Hi,
>
> I noticed that the 405 watchdog driver's ioctl() for GETPERIOD and SETPERIOD
> are not working correctly. The ioctls pass the watchdog timer period in
> microseconds.
> The variable wdt_period stores the current period in seconds.
>
> The attached patch fixes this behavior.
>
> Matthias
> ----
>
> --- drivers/char/ppc405_wdt.c Wed Jun 4 08:58:42 2003
> +++ /usr/src/linuxppc_2_4_devel/drivers/char/ppc405_wdt.c Tue Dec 24
> 06:00:15 2002
> @@ -190,8 +190,7 @@
> }
> case WDIOC_GETPERIOD:
> /* return watchdog period (units = microseconds) */
> - period = wdt_period * MICROSECBASE;
> -
> + period = (wdt_period / HZ) * MICROSECBASE;
> if (copy_to_user((unsigned long *)arg, &period,
> sizeof(period))) {
> return -EFAULT;
> @@ -234,7 +233,8 @@
> if (period == 0)
> period = MAXONEHOUR * MICROSECBASE;
>
> - wdt_period = period / MICROSECBASE;
> + heartbeat_count(0) = (period / TENMSBASE) +
> + (period % TENMSBASE ? 1 : 0);
> ppc405wd_update_timer();
>
> break;
--
Kenneth Johansson
Ericsson AB Tel: +46 8 719 70 20
Tellusborgsv?gen 90 Fax: +46 8 719 29 45
126 25 Stockholm ken at switchboard.ericsson.se
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