Re: [PATCH] iommu/amd: Override wrong IVRS IOAPIC on Raven Ridge systems

[Kai-Heng Feng]

at 23:39, Joerg Roedel <joro@xxxxxxxxxx> wrote:

> On Thu, Aug 08, 2019 at 06:17:07PM +0800, Kai-Heng Feng wrote:
> > Raven Ridge systems may have malfunction touchpad or hang at boot if
> > incorrect IVRS IOAPIC is provided by BIOS.
> >
> > Users already found correct "ivrs_ioapic=" values, let's put them inside
> > kernel to workaround buggy BIOS.
>
> Will that still work when a fixed BIOS for these laptops is released?

Do you mean that we should stop applying these quirks once a BIOS fix is  
confirmed?

We can modify the quirk to compare BIOS version, if thereâs an unlikely  
BIOS update really fixes the issue.
Before that happens, I think itâs OK to let the quirks stay this way.

Kai-Heng

> 	Joerg