Hi Xin, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on usb/usb-testing] [also build test WARNING on robh/for-next peter-chen-usb/for-usb-next v5.16 next-20220118] [cannot apply to balbi-usb/testing/next] [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/Xin-Ji/dt-bindings-usb-Add-analo... base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing config: alpha-allmodconfig (https://download.01.org/0day-ci/archive/20220120/202201200304.8r6KYfr2-lk...) compiler: alpha-linux-gcc (GCC) 11.2.0 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/760b0d28447fcaef7a39a20ebce9a4fb9... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Xin-Ji/dt-bindings-usb-Add-analogix-anx7411-PD-binding/20220119-190352 git checkout 760b0d28447fcaef7a39a20ebce9a4fb96cc0c7d # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=alpha SHELL=/bin/bash drivers/usb/ 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 >>): 835 | void anx7411_port_unregister_altmodes(struct typec_altmode **adev) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/anx7411_port_unregister_altmodes +835 drivers/usb/typec/anx7411.c 834 836 { 837 int i; 838 839 for (i = 0; i < MAX_ALTMODE; i++) 840 if (adev[i]) { 841 typec_unregister_altmode(adev[i]); 842 adev[i] = NULL; 843 } 844 } 845 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org