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PCI: Disable MSI on RDC PCI to PCIe bridges
authorMarcos Del Sol Vives <marcos@orca.pet>
Sat, 5 Jul 2025 23:32:08 +0000 (01:32 +0200)
committerBjorn Helgaas <bhelgaas@google.com>
Mon, 11 Aug 2025 20:02:51 +0000 (15:02 -0500)
commitebc7086b39e5e4f3d3ca82caaea20538c9b62d42
treedd01fe6e8658a1af558e38f11ae19a99df803dc9tree | snapshot
parent8f5ae30d69d7543eee0d70083daf4de8fe15d585commit | diff
PCI: Disable MSI on RDC PCI to PCIe bridges

RDC PCI to PCIe bridges, present on Vortex86DX3 and Vortex86EX2 SoCs, do
not support MSIs. If enabled, interrupts generated by PCIe 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>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20250705233209.721507-1-marcos@orca.pet
drivers/pci/quirks.c diff | blob | blame | history
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