Hi Manivannan, Thank you for the patch! Yet something to improve: [auto build test ERROR on tty/tty-testing] [also build test ERROR on v4.19-rc3 next-20180910] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Manivannan-Sadhasivam/Add-slave-DMA-support-for-Actios-Semi-S900-SoC/20180903-163744 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing config: arm64-allmodconfig (attached as .config) compiler: aarch64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.2.0 make.cross ARCH=arm64 All errors (new ones prefixed by >>): >> ERROR: Input tree has errors, aborting (use -f to force output) --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation