Re: [PATCH v2] pci: loongson: Workaround MIPS firmware MRRS settings

[Huacai Chen]

On Thu, Aug 31, 2023 at 4:58 PM Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx> wrote:
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> 在 2023/8/31 14:22, Huacai Chen 写道:
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> [...]
> > But it is worth to try, and you can walk the children to set mrrs when
> > the quirk runs on bridges, I think.
> No, this will break hotplug, I had managed to get hotplug work on 2K1000.
> Also we have no guarantee on order of discovering devices.
> >> but the old quirk should run on every single device.
> > Your current patch has a drawback that both quirks will run for MIPS,
> > and their order is random (though it may cause nothing, but not
> > elegant).
> Actually loongson_mrrs_quirk is declared by DECLARE_PCI_FIXUP_EARLY but
> loongson_old_mrrs_quirk is declared by DECLARE_PCI_FIXUP_ENABLE,
> which means loongson_old_mrrs_quirk always runs after loongson_mrrs_quirk as
> expected.
Then I think it is better to put this quirk in arch/mips/loongson64/,
just as pci_fixup_radeon().

Huacai
>
> Thanks
> - Jiaxun
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> [...]