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    Subject[PATCH 4.9 11/74] MIPS: Generic: Fix big endian CPUs on generic machine
    Date
    4.9-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Matt Redfearn <matt.redfearn@imgtec.com>

    commit a3078e593b74fe196e69f122f03ff0b32f652c53 upstream.

    Big endian CPUs require SWAP_IO_SPACE enabled to swap accesses to little
    endian peripherals.

    Without this patch, big endian kernels fail to communicate with little
    endian periperals, such as PCI devices, on QEMU and FPGA based
    platforms.

    Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
    Fixes: eed0eabd12ef ("MIPS: generic: Introduce generic DT-based board support")
    Cc: linux-mips@linux-mips.org
    Cc: linux-kernel@vger.kernel.org
    Patchwork: https://patchwork.linux-mips.org/patch/15105/
    Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
    Cc: Amit Pundir <amit.pundir@linaro.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    arch/mips/Kconfig | 1 +
    1 file changed, 1 insertion(+)

    --- a/arch/mips/Kconfig
    +++ b/arch/mips/Kconfig
    @@ -95,6 +95,7 @@ config MIPS_GENERIC
    select PCI_DRIVERS_GENERIC
    select PINCTRL
    select SMP_UP if SMP
    + select SWAP_IO_SPACE
    select SYS_HAS_CPU_MIPS32_R1
    select SYS_HAS_CPU_MIPS32_R2
    select SYS_HAS_CPU_MIPS32_R6

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