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The value to adjust in the bridge register RALINK_PCI_IOBASE must take into account the raw value from DT, not only the translated linux port number. As long as io_offset is zero, the two are the same, but if you were to use multiple host bridge in the system, or pick a different bus address in DT, you can have a nonzero io_offset. At this means to take into account the bus address which is used to calculate this offset, substracting it from the IO resource start address. Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com> Link: https://lore.kernel.org/r/20210925203224.10419-7-sergio.paracuellos@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>