Re: [PATCH] PCI: Add ACS quirk for Pericom PI7C9X2G304 switches [12d8:b304]

[Bjorn Helgaas <helgaas@kernel.org>]

On Thu, Aug 20, 2026 at 10:20:41AM +0200, Hans de Goede wrote:
> According to the existing quirk the Pericom E5 errata for ACS P2P applies
> to PI7C9X2G404, PI7C9X2G304 and PI7C9X2G303 models.
> 
> The Arduino Ventuno Q board has a PI7C9X2G304 switch (verified from chip
> markings) with a product-id of 0xb304. Add 12d8:b304 to the existing
> list of quirks for this erratum.
> 
> Reviewed-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
> Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
> Signed-off-by: Hans de Goede <johannes.goede@oss.qualcomm.com>

Applied to pci/virtualization for v7.4, thanks!

> ---
>  drivers/pci/quirks.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index b09f27f7846f..1b4e15d744e8 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -6259,6 +6259,10 @@ DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_PERICOM, 0x2303,
>  			 pci_fixup_pericom_acs_store_forward);
>  DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_PERICOM, 0x2303,
>  			 pci_fixup_pericom_acs_store_forward);
> +DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_PERICOM, 0xb304,
> +			 pci_fixup_pericom_acs_store_forward);
> +DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_PERICOM, 0xb304,
> +			 pci_fixup_pericom_acs_store_forward);
>  DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_PERICOM, 0xb404,
>  			 pci_fixup_pericom_acs_store_forward);
>  DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_PERICOM, 0xb404,
> -- 
> 2.55.0
>