4.9-stable review patch. If anyone has any objections, please let me know.
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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