Re: [PATCH 1/1] drivers/perf: arm_pmu_acpi: avoid perf IRQ init when guest PMU is off

From: Will Deacon
Date: Thu May 25 2017 - 11:51:08 EST


On Thu, May 25, 2017 at 10:49:49AM -0500, Wei Huang wrote:
> On 05/25/2017 10:28 AM, Will Deacon wrote:
> > On Wed, May 24, 2017 at 09:36:41AM -0500, Wei Huang wrote:
> >> if (gicc->flags & ACPI_MADT_PERFORMANCE_IRQ_MODE)
> >> trigger = ACPI_EDGE_SENSITIVE;
> >> else
> >> @@ -58,7 +61,8 @@ static void arm_pmu_acpi_unregister_irq(int cpu)
> >> return;
> >>
> >> gsi = gicc->performance_interrupt;
> >> - acpi_unregister_gsi(gsi);
> >> + if (gsi)
> >> + acpi_unregister_gsi(gsi);
> >
> > ... but then I don't see how we can get here, so I'll drop this hunk.
>
> I am OK to drop it. It was added just to be cautious... Do you need
> another version from me or you will remove this hunk?

I can drop this hunk, no need to repost.

Thanks,

Will