Messages in this thread | | | Date | Sun, 09 Mar 2014 19:29:16 -0700 | From | Guenter Roeck <> | Subject | Re: [PATCH] it87_wdt: Work around non-working CIR interrupts |
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On 03/06/2014 01:36 AM, Marc van der Wal wrote: > From: Marc van der Wal <x0r+kernel@x0r.fr> > > On some hardware platforms, the it87_wdt watchdog resets the machine > despite the watchdog daemon running and writing to /dev/watchdog. > > This is due to Consumer IR buffer underrun interrupts being used as > triggers to reset the timer. On some buggy hardware implementations > such as the iEi AFL-12A-N270 single-board computer, this method does > not work. > > However, resetting the timer by writing its original timeout value in > its configuration register over and over again suppresses the unwanted > reboots. > > Add a module option (nocir), 0 by default in order not to break existing > setups. Setting it to 1 enables the workaround. > > Fixes bug #42801 <https://bugzilla.kernel.org/show_bug.cgi?id=42801>. > Tested primarily on Linux 3.5.7, applies cleanly on Linux 3.13.5. > > Signed-off-by: Marc van der Wal <x0r+kernel@x0r.fr>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
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