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550a190494
ASPEED BMC controllers have VGA and USB functions behind a PCIe-to-PCI
bridge that causes them to share the same StreamID:
[e0]---00.0-[e1-e2]----00.0-[e2]--+-00.0 ASPEED Graphics Family
\-02.0 ASPEED USB Controller
Both devices get StreamID 0x5e200 due to bridge aliasing, causing the USB
controller to be rejected with 'Aliasing StreamID unsupported'.
Per ASPEED, the AST1150 doesn't use a real PCI bus and always forwards
the original Requester ID from downstream devices rather than replacing
it with any alias.
Add a new PCI_DEV_FLAGS_PCI_BRIDGE_NO_ALIAS flag and apply it to the
AST1150.
Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Nirmoy Das <nirmoyd@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://patch.msgid.link/20251217154529.377586-2-nirmoyd@nvidia.com
471 lines
14 KiB
471 lines
14 KiB