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SubjectRe: [PATCH 0/2] PCI: MSI: Deal with devices lying about their masking capability
Date
On Thu, Nov 04 2021 at 18:01, Marc Zyngier wrote:
> Rui reported[1] that his Nvidia ION system stopped working with 5.15,
> with the AHCI device failing to get any MSI. A rapid investigation
> revealed that although the device doesn't advertise MSI masking, it
> actually needs it. Quality hardware indeed.
>
> Anyway, the couple of patches below are an attempt at dealing with the
> issue in a more or less generic way.
>
> [1] https://lore.kernel.org/r/CALjTZvbzYfBuLB+H=fj2J+9=DxjQ2Uqcy0if_PvmJ-nU-qEgkg@mail.gmail.com
>
> Marc Zyngier (2):
> PCI: MSI: Deal with devices lying about their MSI mask capability
> PCI: Add MSI masking quirk for Nvidia ION AHCI
>
> drivers/pci/msi.c | 3 +++
> drivers/pci/quirks.c | 6 ++++++
> include/linux/pci.h | 2 ++
> 3 files changed, 11 insertions(+)

Groan.

Reviewed-by: Thomas Gleixner <tglx@linutronix.de>

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