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One MediaTek PCIe Gen3 controller has only one port, where PCI bus 0 on this port represents the controller itself and bus 1 represents the external PCIe device. If multiple PCIe controllers are probed in U-Boot, U-Boot will use bus numbers greater than 2 as input parameters. Therefore, we should convert the BDF bus number to either 0 or 1 by subtracting the offset by controller->seq_. Signed-off-by: Sam Shih <sam.shih@mediatek.com> Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>