* [PATCH] pci: disable MSI on RDC PCI to PCI-E bridges
@ 2025-07-05 23:32 Marcos Del Sol Vives
2025-08-06 21:23 ` Bjorn Helgaas
0 siblings, 1 reply; 2+ messages in thread
From: Marcos Del Sol Vives @ 2025-07-05 23:32 UTC (permalink / raw)
To: linux-kernel; +Cc: marcos, Bjorn Helgaas, linux-pci
These bridges, present on Vortex86DX3 and Vortex86EX2 SoCs, do not
support MSIs. If enabled, interrupts generated by PCI-E devices never
reach the processor.
I have contacted the manufacturer (DM&P) and they confirmed that PCI MSIs
need to be disabled for them.
Signed-off-by: Marcos Del Sol Vives <marcos@orca.pet>
---
drivers/pci/quirks.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index d7f4ee634263..f610ea45ca9e 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -2715,6 +2715,7 @@ static void quirk_disable_msi(struct pci_dev *dev)
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_disable_msi);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, 0xa238, quirk_disable_msi);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x5a3f, quirk_disable_msi);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_RDC, 0x1031, quirk_disable_msi);
/*
* The APC bridge device in AMD 780 family northbridges has some random
--
2.34.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] pci: disable MSI on RDC PCI to PCI-E bridges
2025-07-05 23:32 [PATCH] pci: disable MSI on RDC PCI to PCI-E bridges Marcos Del Sol Vives
@ 2025-08-06 21:23 ` Bjorn Helgaas
0 siblings, 0 replies; 2+ messages in thread
From: Bjorn Helgaas @ 2025-08-06 21:23 UTC (permalink / raw)
To: Marcos Del Sol Vives; +Cc: linux-kernel, Bjorn Helgaas, linux-pci
On Sun, Jul 06, 2025 at 01:32:08AM +0200, Marcos Del Sol Vives wrote:
> These bridges, present on Vortex86DX3 and Vortex86EX2 SoCs, do not
> support MSIs. If enabled, interrupts generated by PCI-E devices never
> reach the processor.
>
> I have contacted the manufacturer (DM&P) and they confirmed that PCI MSIs
> need to be disabled for them.
>
> Signed-off-by: Marcos Del Sol Vives <marcos@orca.pet>
Applied to pci/msi for v6.18, thanks!
> ---
> drivers/pci/quirks.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index d7f4ee634263..f610ea45ca9e 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -2715,6 +2715,7 @@ static void quirk_disable_msi(struct pci_dev *dev)
> DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_disable_msi);
> DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, 0xa238, quirk_disable_msi);
> DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x5a3f, quirk_disable_msi);
> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_RDC, 0x1031, quirk_disable_msi);
>
> /*
> * The APC bridge device in AMD 780 family northbridges has some random
> --
> 2.34.1
>
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2025-08-06 21:23 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2025-07-05 23:32 [PATCH] pci: disable MSI on RDC PCI to PCI-E bridges Marcos Del Sol Vives
2025-08-06 21:23 ` Bjorn Helgaas
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox