PCI: mvebu: Set PCI_BRIDGE_EMUL_NO_IO_FORWARD when IO is unsupported

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This will make PCI bridge to return zeros when accessing IO base and limit
registers, as required by PCIe base specification.

This allows to remove adhoc checks around mvebu_pcie_handle_iobase_change()
function for unsupported IO ranges. PCI_BRIDGE_EMUL_NO_IO_FORWARD ensures
that there will be no non-zeros write to IO registers when IO is not
supported.

Link: https://lore.kernel.org/r/20220104153529.31647-8-pali@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>

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Pali Rohár 2022-01-04 16:35:25 +01:00 • committed by Lorenzo Pieralisi

parent 7a02acdb5d

commit 5c88ed7985

1 changed files with 10 additions and 19 deletions

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drivers/pci/controller/pci-mvebu.c

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