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charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit tree: https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next head: 5f6722c971aa9d5b9736701926c3fdd1928db272 commit: b3a4efc88601cb5fc97b4ae23c478700a60302da [79/87] hwmon: add MP2925 and MP2929 driver config: s390-allmodconfig (https://download.01.org/0day-ci/archive/20250925/202509251422.Cnmuh8EH-lkp@intel.com/config) compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250925/202509251422.Cnmuh8EH-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202509251422.Cnmuh8EH-lkp@intel.com/ All warnings (new ones prefixed by >>): >> drivers/hwmon/pmbus/mp2925.c:159:11: warning: variable 'ret' is uninitialized when used here [-Wuninitialized] 159 | (ret & ~GENMASK(11, 0)) | | ^~~ drivers/hwmon/pmbus/mp2925.c:137:9: note: initialize the variable 'ret' to silence this warning 137 | int ret; | ^ | = 0 1 warning generated. vim +/ret +159 drivers/hwmon/pmbus/mp2925.c 133 134 static int mp2925_write_word_data(struct i2c_client *client, int page, int reg, 135 u16 word) 136 { 137 int ret; 138 139 switch (reg) { 140 case PMBUS_VIN_OV_FAULT_LIMIT: 141 case PMBUS_VIN_OV_WARN_LIMIT: 142 case PMBUS_VIN_UV_WARN_LIMIT: 143 case PMBUS_VIN_UV_FAULT_LIMIT: 144 /* 145 * The PMBUS_VIN_OV_FAULT_LIMIT, PMBUS_VIN_OV_WARN_LIMIT, 146 * PMBUS_VIN_UV_WARN_LIMIT and PMBUS_VIN_UV_FAULT_LIMIT 147 * of MP2925 is linear11 format, and the exponent is a 148 * constant value(5'b11100)， so the exponent of word 149 * parameter should be converted to 5'b11100(0x1C). 150 */ 151 ret = pmbus_write_word_data(client, page, reg, 152 mp2925_linear_exp_transfer(word, 0x1C)); 153 if (ret < 0) 154 return ret; 155 break; 156 case PMBUS_VOUT_OV_FAULT_LIMIT: 157 case PMBUS_VOUT_UV_FAULT_LIMIT: 158 ret = pmbus_write_word_data(client, page, reg, > 159 (ret & ~GENMASK(11, 0)) | 160 FIELD_PREP(GENMASK(11, 0), 161 DIV_ROUND_CLOSEST(word * MP2925_VOUT_OVUV_DIV, 162 MP2925_VOUT_OVUV_UINT))); 163 break; 164 case PMBUS_OT_FAULT_LIMIT: 165 case PMBUS_OT_WARN_LIMIT: 166 /* 167 * The PMBUS_OT_FAULT_LIMIT and PMBUS_OT_WARN_LIMIT of 168 * MP2925 is linear11 format, and the exponent is a 169 * constant value(5'b00000), so the exponent of word 170 * parameter should be converted to 5'b00000. 171 */ 172 ret = pmbus_write_word_data(client, page, reg, 173 mp2925_linear_exp_transfer(word, 0x00)); 174 if (ret < 0) 175 return ret; 176 break; 177 case PMBUS_IOUT_OC_FAULT_LIMIT: 178 case PMBUS_IOUT_OC_WARN_LIMIT: 179 /* 180 * The PMBUS_IOUT_OC_FAULT_LIMIT and PMBUS_IOUT_OC_WARN_LIMIT 181 * of MP2925 is linear11 format, and the exponent is a 182 * can not be changed. 183 */ 184 ret = pmbus_read_word_data(client, page, 0xff, reg); 185 if (ret < 0) 186 return ret; 187 188 ret = pmbus_write_word_data(client, page, reg, 189 mp2925_linear_exp_transfer(word, 190 FIELD_GET(GENMASK(15, 11), 191 ret))); 192 break; 193 default: 194 ret = -EINVAL; 195 break; 196 } 197 198 return ret; 199 } 200 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki