In-Reply-To: <91a8fb6dff811b36db951ee98d955ad14a2a30eb.1642151791.git.zong.li(a)sifive.com&gt; References: <91a8fb6dff811b36db951ee98d955ad14a2a30eb.1642151791.git.zong.li(a)sifive.com&gt; TO: Zong Li <zong.li(a)sifive.com&gt; TO: robh+dt(a)kernel.org TO: paul.walmsley(a)sifive.com TO: palmer(a)dabbelt.com TO: aou(a)eecs.berkeley.edu TO: krzysztof.kozlowski(a)canonical.com TO: conor.dooley(a)microchip.com TO: geert(a)linux-m68k.org TO: bin.meng(a)windriver.com TO: green.wan(a)sifive.com TO: vkoul(a)kernel.org Hi Zong, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on vkoul-dmaengine/next] [also build test WARNING on v5.16] [cannot apply to robh/for-next next-20220114] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Zong-Li/Determine-the-number-of-... base: https://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git next config: x86_64-randconfig-a001 (https://download.01.org/0day-ci/archive/20220115/202201150129.P4syQvOh-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 82c8aca93488730ce8f66101e0f3538f14b551dd) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/efa33512fd463fd6e29750992df1d4051... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Zong-Li/Determine-the-number-of-DMA-channels-by-dma-channels-property/20220114-172017 git checkout efa33512fd463fd6e29750992df1d40513eb5a7c # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/dma/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org