Hi Quan, I love your patch! Perhaps something to improve: [auto build test WARNING on char-misc/char-misc-testing] [also build test WARNING on groeck-staging/hwmon-next lee-mfd/for-mfd-next v5.17 next-20220321] [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/Quan-Nguyen/Add-Ampere-s-Altra-SMPro-MFD-and-its-child-drivers/20220321-161811 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git 37fd83916da2e4cae03d350015c82a67b1b334c4 config: hexagon-allyesconfig (https://download.01.org/0day-ci/archive/20220322/202203220139.67ewF74A-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 85e9b2687a13d1908aa86d1b89c5ce398a06cd39) 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/20d62dfe69d4a3a0cb64bf97df0062d050d6a4d4 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Quan-Nguyen/Add-Ampere-s-Altra-SMPro-MFD-and-its-child-drivers/20220321-161811 git checkout 20d62dfe69d4a3a0cb64bf97df0062d050d6a4d4 # 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=hexagon SHELL=/bin/bash drivers/hwmon/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/hwmon/smpro-hwmon.c:378:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] default: ^ drivers/hwmon/smpro-hwmon.c:378:2: note: insert 'break;' to avoid fall-through default: ^ break; 1 warning generated. vim +378 drivers/hwmon/smpro-hwmon.c 91d3fe230bebb1c Quan Nguyen 2022-03-21 359 91d3fe230bebb1c Quan Nguyen 2022-03-21 360 static umode_t smpro_is_visible(const void *data, enum hwmon_sensor_types type, 91d3fe230bebb1c Quan Nguyen 2022-03-21 361 u32 attr, int channel) 91d3fe230bebb1c Quan Nguyen 2022-03-21 362 { 91d3fe230bebb1c Quan Nguyen 2022-03-21 363 const struct smpro_hwmon *hwmon = data; 91d3fe230bebb1c Quan Nguyen 2022-03-21 364 unsigned int value; 91d3fe230bebb1c Quan Nguyen 2022-03-21 365 int ret; 91d3fe230bebb1c Quan Nguyen 2022-03-21 366 91d3fe230bebb1c Quan Nguyen 2022-03-21 367 switch (type) { 91d3fe230bebb1c Quan Nguyen 2022-03-21 368 case hwmon_temp: 91d3fe230bebb1c Quan Nguyen 2022-03-21 369 switch (attr) { 91d3fe230bebb1c Quan Nguyen 2022-03-21 370 case hwmon_temp_input: 91d3fe230bebb1c Quan Nguyen 2022-03-21 371 case hwmon_temp_label: 91d3fe230bebb1c Quan Nguyen 2022-03-21 372 case hwmon_temp_crit: 91d3fe230bebb1c Quan Nguyen 2022-03-21 373 ret = regmap_read(hwmon->regmap, temperature[channel].reg, &value); 91d3fe230bebb1c Quan Nguyen 2022-03-21 374 if (ret || value == 0xFFFF) 91d3fe230bebb1c Quan Nguyen 2022-03-21 375 return 0; 91d3fe230bebb1c Quan Nguyen 2022-03-21 376 break; 91d3fe230bebb1c Quan Nguyen 2022-03-21 377 } 91d3fe230bebb1c Quan Nguyen 2022-03-21 @378 default: 91d3fe230bebb1c Quan Nguyen 2022-03-21 379 break; 91d3fe230bebb1c Quan Nguyen 2022-03-21 380 } 91d3fe230bebb1c Quan Nguyen 2022-03-21 381 91d3fe230bebb1c Quan Nguyen 2022-03-21 382 return 0444; 91d3fe230bebb1c Quan Nguyen 2022-03-21 383 } 91d3fe230bebb1c Quan Nguyen 2022-03-21 384 -- 0-DAY CI Kernel Test Service https://01.org/lkp