* [PATCH] PCI: Add ACS quirk for Pericom PI7C9X2G304 switches [12d8:b304]
@ 2026-06-18 19:30 Hans de Goede
2026-06-18 19:34 ` sashiko-bot
` (2 more replies)
0 siblings, 3 replies; 7+ messages in thread
From: Hans de Goede @ 2026-06-18 19:30 UTC (permalink / raw)
To: Bjorn Helgaas
Cc: Hans de Goede, Manivannan Sadhasivam, Loic Poulain, linux-pci
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.
Signed-off-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
---
drivers/pci/quirks.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index caaed1a01dc0..2fd403ea3659 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -6225,6 +6225,10 @@ 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,
--
2.47.3
^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH] PCI: Add ACS quirk for Pericom PI7C9X2G304 switches [12d8:b304]
2026-06-18 19:30 Hans de Goede
@ 2026-06-18 19:34 ` sashiko-bot
2026-06-19 7:35 ` Loic Poulain
2026-06-19 7:35 ` Manivannan Sadhasivam
2 siblings, 0 replies; 7+ messages in thread
From: sashiko-bot @ 2026-06-18 19:34 UTC (permalink / raw)
To: Hans de Goede; +Cc: linux-pci
> 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.
>
> Signed-off-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260618193030.69528-1-johannes.goede@oss.qualcomm.com?part=1
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] PCI: Add ACS quirk for Pericom PI7C9X2G304 switches [12d8:b304]
2026-06-18 19:30 Hans de Goede
2026-06-18 19:34 ` sashiko-bot
@ 2026-06-19 7:35 ` Loic Poulain
2026-06-19 7:35 ` Manivannan Sadhasivam
2 siblings, 0 replies; 7+ messages in thread
From: Loic Poulain @ 2026-06-19 7:35 UTC (permalink / raw)
To: Hans de Goede; +Cc: Bjorn Helgaas, Manivannan Sadhasivam, linux-pci
On Thu, Jun 18, 2026 at 9:30 PM Hans de Goede
<johannes.goede@oss.qualcomm.com> 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.
>
> Signed-off-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
Confirmed with schematics and documentation.
Reviewed-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
> ---
> drivers/pci/quirks.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index caaed1a01dc0..2fd403ea3659 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -6225,6 +6225,10 @@ 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,
> --
> 2.47.3
>
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] PCI: Add ACS quirk for Pericom PI7C9X2G304 switches [12d8:b304]
2026-06-18 19:30 Hans de Goede
2026-06-18 19:34 ` sashiko-bot
2026-06-19 7:35 ` Loic Poulain
@ 2026-06-19 7:35 ` Manivannan Sadhasivam
2 siblings, 0 replies; 7+ messages in thread
From: Manivannan Sadhasivam @ 2026-06-19 7:35 UTC (permalink / raw)
To: Hans de Goede
Cc: Bjorn Helgaas, Manivannan Sadhasivam, Loic Poulain, linux-pci
On Thu, Jun 18, 2026 at 09:30:30PM +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.
>
> Signed-off-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
- Mani
> ---
> drivers/pci/quirks.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index caaed1a01dc0..2fd403ea3659 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -6225,6 +6225,10 @@ 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,
> --
> 2.47.3
>
>
--
மணிவண்ணன் சதாசிவம்
^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH] PCI: Add ACS quirk for Pericom PI7C9X2G304 switches [12d8:b304]
@ 2026-08-20 8:20 Hans de Goede
2026-08-20 8:21 ` Hans de Goede
2026-08-20 8:22 ` sashiko-bot
0 siblings, 2 replies; 7+ messages in thread
From: Hans de Goede @ 2026-08-20 8:20 UTC (permalink / raw)
To: Bjorn Helgaas
Cc: Hans de Goede, linux-pci, Loic Poulain, Manivannan Sadhasivam
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>
---
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
^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH] PCI: Add ACS quirk for Pericom PI7C9X2G304 switches [12d8:b304]
2026-08-20 8:20 [PATCH] PCI: Add ACS quirk for Pericom PI7C9X2G304 switches [12d8:b304] Hans de Goede
@ 2026-08-20 8:21 ` Hans de Goede
2026-08-20 8:22 ` sashiko-bot
1 sibling, 0 replies; 7+ messages in thread
From: Hans de Goede @ 2026-08-20 8:21 UTC (permalink / raw)
To: Bjorn Helgaas; +Cc: linux-pci, Loic Poulain, Manivannan Sadhasivam
Hi All,
Note this is a resend seems the previous patch seems to have fallen through
the cracks.
Regards,
Hans
On 20-Aug-26 10:20, 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>
> ---
> 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,
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] PCI: Add ACS quirk for Pericom PI7C9X2G304 switches [12d8:b304]
2026-08-20 8:20 [PATCH] PCI: Add ACS quirk for Pericom PI7C9X2G304 switches [12d8:b304] Hans de Goede
2026-08-20 8:21 ` Hans de Goede
@ 2026-08-20 8:22 ` sashiko-bot
1 sibling, 0 replies; 7+ messages in thread
From: sashiko-bot @ 2026-08-20 8:22 UTC (permalink / raw)
To: Hans de Goede; +Cc: linux-pci
> 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>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260820082041.13470-1-johannes.goede@oss.qualcomm.com?part=1
^ permalink raw reply [flat|nested] 7+ messages in thread
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2026-08-20 8:20 [PATCH] PCI: Add ACS quirk for Pericom PI7C9X2G304 switches [12d8:b304] Hans de Goede
2026-08-20 8:21 ` Hans de Goede
2026-08-20 8:22 ` sashiko-bot
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2026-06-18 19:30 Hans de Goede
2026-06-18 19:34 ` sashiko-bot
2026-06-19 7:35 ` Loic Poulain
2026-06-19 7:35 ` Manivannan Sadhasivam
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