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Commit1b79c52844("PCI: cadence: Add host driver for Cadence PCIe controller") in order to update Vendor ID, directly wrote to PCI_VENDOR_ID register. However PCI_VENDOR_ID in root port configuration space is read-only register and writing to it will have no effect. Use local management register to configure Vendor ID and Subsystem Vendor ID. Link: https://lore.kernel.org/r/20200722110317.4744-10-kishon@ti.com Fixes:1b79c52844("PCI: cadence: Add host driver for Cadence PCIe controller") Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Rob Herring <robh@kernel.org>