On Wed, 2014-12-11 at 06:03:14 UTC, Benjamin Herrenschmidt wrote:
> If OPAL requests it, call it back via opal_poll_events() at a
> regular interval. Some versions of OPAL on some machines require
> this to operate some internal timeouts properly.
>
> diff --git a/arch/powerpc/platforms/powernv/opal.c
> b/arch/powerpc/platforms/powernv/opal.c
> index f1e0d8c..0153064 100644
> --- a/arch/powerpc/platforms/powernv/opal.c
> +++ b/arch/powerpc/platforms/powernv/opal.c
> @@ -678,6 +680,49 @@ static int __init opal_init(void)
> " (0x%x)\n", rc, irq, hwirq);
> opal_irqs[i] = irq;
> }
> +}
> +
> +static int kopald(void *unused)
> +{
> + set_freezable();
> + do {
> + try_to_freeze();
> + opal_poll_events(NULL);
> + msleep_interruptible(opal_heartbeat);
> + } while (!kthread_should_stop());
> +
> + return 0;
> +}
> +
> +static void opal_init_heartbeat(void)
> +{
> + /* Old firwmware, we assume the HVC heartbeat is sufficient */
> + if (of_property_read_u32(opal_node, "ibm,heartbeat-freq",
> + &opal_heartbeat) != 0)
I'd assume "freq" with no units is in HZ, but looks like it's milliseconds. I
guess it's too late to rename it.
cheers
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