Let's Cc: LAKML, and To: Russell. Russell, any comments on this?
Without this patch we got the heartbeat's reboot_notifier called twice while testing the recent hibernation patches, which was unexpected and produced a kernel panic: https://lkml.org/lkml/2014/3/19/363 Instead of fixing the heartbeat LED trigger, or the hibernation code, it seems better to fix the ARM machine_power_off, as it's not supposed to return. On Mar 24, Sebastian Capella wrote: > Add loop to prevent return from machine_power_off if > pm_power_off is null or does not halt the system. > This caused a panic during hibernation testing on Kirkwood > Openblocks A6 board. > > Signed-off-by: Sebastian Capella <sebastian.cape...@linaro.org> > Reported-by: Ezequiel Garcia <ezequiel.gar...@free-electrons.com> > Cc: Len Brown <len.br...@intel.com> > Cc: Pavel Machek <pa...@ucw.cz> > Cc: "Rafael J. Wysocki" <r...@rjwysocki.net> > --- > arch/arm/kernel/process.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c > index f58b723..6ffdc2c 100644 > --- a/arch/arm/kernel/process.c > +++ b/arch/arm/kernel/process.c > @@ -217,6 +217,8 @@ void machine_power_off(void) > > if (pm_power_off) > pm_power_off(); > + while (1) > + cpu_relax(); > } > > /* > -- > 1.7.9.5 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-pm" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Ezequiel García, Free Electrons Embedded Linux, Kernel and Android Engineering http://free-electrons.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
