Hi Dan, thanks, I will fix this in v3 of this patch series. Vaclav st 17. 3. 2021 v 6:14 odesílatel Dan Carpenter <dan.carpenter(a)oracle.com&gt; napsal: > > Hi "Václav, > > url: https://github.com/0day-ci/linux/commits/V-clav-Kubern-t/hwmon-max31790-R... > base: https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next > config: x86_64-randconfig-m001-20210316 (attached as .config) > compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp(a)intel.com&gt; > Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com&gt; > > smatch warnings: > drivers/hwmon/max31790.c:263 max31790_fan_is_visible() warn: impossible condition '(fan_config < 0) => (0-255 < 0)' > drivers/hwmon/max31790.c:337 max31790_write_pwm() warn: impossible condition '(fan_config < 0) => (0-255 < 0)' > drivers/hwmon/max31790.c:372 max31790_pwm_is_visible() warn: impossible condition '(fan_config < 0) => (0-255 < 0)' > > vim +263 drivers/hwmon/max31790.c > > 54187ff9d766b2 Guenter Roeck 2016-07-01 257 static umode_t max31790_fan_is_visible(const void *_data, u32 attr, int channel) > 195a4b4298a795 Il Han 2015-08-30 258 { > 54187ff9d766b2 Guenter Roeck 2016-07-01 259 const struct max31790_data *data = _data; > 2c8602cfaeab63 Václav Kubernát 2021-03-16 260 struct regmap *regmap = data->regmap; > 2c8602cfaeab63 Václav Kubernát 2021-03-16 261 u8 fan_config = read_reg_byte(regmap, MAX31790_REG_FAN_CONFIG(channel % NR_CHANNEL)); > 2c8602cfaeab63 Václav Kubernát 2021-03-16 262 > 2c8602cfaeab63 Václav Kubernát 2021-03-16 @263 if (fan_config < 0) > ^^^^^^^^^^^^^^ > A u8 can't be negative. > > 2c8602cfaeab63 Václav Kubernát 2021-03-16 264 return 0; > 54187ff9d766b2 Guenter Roeck 2016-07-01 265 > 54187ff9d766b2 Guenter Roeck 2016-07-01 266 switch (attr) { > 54187ff9d766b2 Guenter Roeck 2016-07-01 267 case hwmon_fan_input: > 54187ff9d766b2 Guenter Roeck 2016-07-01 268 case hwmon_fan_fault: > 54187ff9d766b2 Guenter Roeck 2016-07-01 269 if (channel < NR_CHANNEL || > 54187ff9d766b2 Guenter Roeck 2016-07-01 270 (fan_config & MAX31790_FAN_CFG_TACH_INPUT)) > dc8dbb4d7672b7 Guenter Roeck 2018-12-10 271 return 0444; > 54187ff9d766b2 Guenter Roeck 2016-07-01 272 return 0; > 54187ff9d766b2 Guenter Roeck 2016-07-01 273 case hwmon_fan_target: > 54187ff9d766b2 Guenter Roeck 2016-07-01 274 if (channel < NR_CHANNEL && > 54187ff9d766b2 Guenter Roeck 2016-07-01 275 !(fan_config & MAX31790_FAN_CFG_TACH_INPUT)) > dc8dbb4d7672b7 Guenter Roeck 2018-12-10 276 return 0644; > 54187ff9d766b2 Guenter Roeck 2016-07-01 277 return 0; > 54187ff9d766b2 Guenter Roeck 2016-07-01 278 default: > 54187ff9d766b2 Guenter Roeck 2016-07-01 279 return 0; > 195a4b4298a795 Il Han 2015-08-30 280 } > 195a4b4298a795 Il Han 2015-08-30 281 } > 195a4b4298a795 Il Han 2015-08-30 282 > 54187ff9d766b2 Guenter Roeck 2016-07-01 283 static int max31790_read_pwm(struct device *dev, u32 attr, int channel, > 54187ff9d766b2 Guenter Roeck 2016-07-01 284 long *val) > 195a4b4298a795 Il Han 2015-08-30 285 { > 2c8602cfaeab63 Václav Kubernát 2021-03-16 286 struct max31790_data *data = dev_get_drvdata(dev); > 2c8602cfaeab63 Václav Kubernát 2021-03-16 287 struct regmap *regmap = data->regmap; > 2c8602cfaeab63 Václav Kubernát 2021-03-16 288 int read; > 195a4b4298a795 Il Han 2015-08-30 289 > 195a4b4298a795 Il Han 2015-08-30 290 if (IS_ERR(data)) > 195a4b4298a795 Il Han 2015-08-30 291 return PTR_ERR(data); > 195a4b4298a795 Il Han 2015-08-30 292 > 54187ff9d766b2 Guenter Roeck 2016-07-01 293 switch (attr) { > 54187ff9d766b2 Guenter Roeck 2016-07-01 294 case hwmon_pwm_input: > 2c8602cfaeab63 Václav Kubernát 2021-03-16 295 read = read_reg_word(regmap, MAX31790_REG_PWMOUT(channel)); > 2c8602cfaeab63 Václav Kubernát 2021-03-16 296 if (read < 0) > 2c8602cfaeab63 Václav Kubernát 2021-03-16 297 return read; > 2c8602cfaeab63 Václav Kubernát 2021-03-16 298 > 2c8602cfaeab63 Václav Kubernát 2021-03-16 299 *val = read >> 8; > 54187ff9d766b2 Guenter Roeck 2016-07-01 300 return 0; > 54187ff9d766b2 Guenter Roeck 2016-07-01 301 case hwmon_pwm_enable: > 2c8602cfaeab63 Václav Kubernát 2021-03-16 302 read = read_reg_byte(regmap, MAX31790_REG_FAN_CONFIG(channel)); > 2c8602cfaeab63 Václav Kubernát 2021-03-16 303 if (read < 0) > 2c8602cfaeab63 Václav Kubernát 2021-03-16 304 return read; > 2c8602cfaeab63 Václav Kubernát 2021-03-16 305 > 2c8602cfaeab63 Václav Kubernát 2021-03-16 306 if (read & MAX31790_FAN_CFG_RPM_MODE) > 54187ff9d766b2 Guenter Roeck 2016-07-01 307 *val = 2; > 2c8602cfaeab63 Václav Kubernát 2021-03-16 308 else if (read & MAX31790_FAN_CFG_TACH_INPUT_EN) > 54187ff9d766b2 Guenter Roeck 2016-07-01 309 *val = 1; > 195a4b4298a795 Il Han 2015-08-30 310 else > 54187ff9d766b2 Guenter Roeck 2016-07-01 311 *val = 0; > 54187ff9d766b2 Guenter Roeck 2016-07-01 312 return 0; > 54187ff9d766b2 Guenter Roeck 2016-07-01 313 default: > 54187ff9d766b2 Guenter Roeck 2016-07-01 314 return -EOPNOTSUPP; > 54187ff9d766b2 Guenter Roeck 2016-07-01 315 } > 195a4b4298a795 Il Han 2015-08-30 316 } > 195a4b4298a795 Il Han 2015-08-30 317 > 54187ff9d766b2 Guenter Roeck 2016-07-01 318 static int max31790_write_pwm(struct device *dev, u32 attr, int channel, > 54187ff9d766b2 Guenter Roeck 2016-07-01 319 long val) > 195a4b4298a795 Il Han 2015-08-30 320 { > 195a4b4298a795 Il Han 2015-08-30 321 struct max31790_data *data = dev_get_drvdata(dev); > 2c8602cfaeab63 Václav Kubernát 2021-03-16 322 struct regmap *regmap = data->regmap; > 54187ff9d766b2 Guenter Roeck 2016-07-01 323 u8 fan_config; > 54187ff9d766b2 Guenter Roeck 2016-07-01 324 int err = 0; > 195a4b4298a795 Il Han 2015-08-30 325 > 54187ff9d766b2 Guenter Roeck 2016-07-01 326 switch (attr) { > 54187ff9d766b2 Guenter Roeck 2016-07-01 327 case hwmon_pwm_input: > 54187ff9d766b2 Guenter Roeck 2016-07-01 328 if (val < 0 || val > 255) { > 54187ff9d766b2 Guenter Roeck 2016-07-01 329 err = -EINVAL; > 54187ff9d766b2 Guenter Roeck 2016-07-01 330 break; > 54187ff9d766b2 Guenter Roeck 2016-07-01 331 } > 2c8602cfaeab63 Václav Kubernát 2021-03-16 332 err = write_reg_word(regmap, MAX31790_REG_PWMOUT(channel), val << 8); > 195a4b4298a795 Il Han 2015-08-30 333 break; > 54187ff9d766b2 Guenter Roeck 2016-07-01 334 case hwmon_pwm_enable: > 2c8602cfaeab63 Václav Kubernát 2021-03-16 335 fan_config = read_reg_byte(regmap, MAX31790_REG_FAN_CONFIG(channel % NR_CHANNEL)); > 2c8602cfaeab63 Václav Kubernát 2021-03-16 336 > 2c8602cfaeab63 Václav Kubernát 2021-03-16 @337 if (fan_config < 0) > 2c8602cfaeab63 Václav Kubernát 2021-03-16 338 return fan_config; > 2c8602cfaeab63 Václav Kubernát 2021-03-16 339 > 54187ff9d766b2 Guenter Roeck 2016-07-01 340 if (val == 0) { > 54187ff9d766b2 Guenter Roeck 2016-07-01 341 fan_config &= ~(MAX31790_FAN_CFG_TACH_INPUT_EN | > 54187ff9d766b2 Guenter Roeck 2016-07-01 342 MAX31790_FAN_CFG_RPM_MODE); > 54187ff9d766b2 Guenter Roeck 2016-07-01 343 } else if (val == 1) { > 54187ff9d766b2 Guenter Roeck 2016-07-01 344 fan_config = (fan_config | > 54187ff9d766b2 Guenter Roeck 2016-07-01 345 MAX31790_FAN_CFG_TACH_INPUT_EN) & > 54187ff9d766b2 Guenter Roeck 2016-07-01 346 ~MAX31790_FAN_CFG_RPM_MODE; > 54187ff9d766b2 Guenter Roeck 2016-07-01 347 } else if (val == 2) { > 54187ff9d766b2 Guenter Roeck 2016-07-01 348 fan_config |= MAX31790_FAN_CFG_TACH_INPUT_EN | > 54187ff9d766b2 Guenter Roeck 2016-07-01 349 MAX31790_FAN_CFG_RPM_MODE; > 54187ff9d766b2 Guenter Roeck 2016-07-01 350 } else { > 54187ff9d766b2 Guenter Roeck 2016-07-01 351 err = -EINVAL; > 195a4b4298a795 Il Han 2015-08-30 352 break; > 54187ff9d766b2 Guenter Roeck 2016-07-01 353 } > 2c8602cfaeab63 Václav Kubernát 2021-03-16 354 err = regmap_write(regmap, > 54187ff9d766b2 Guenter Roeck 2016-07-01 355 MAX31790_REG_FAN_CONFIG(channel), > 54187ff9d766b2 Guenter Roeck 2016-07-01 356 fan_config); > 195a4b4298a795 Il Han 2015-08-30 357 break; > 195a4b4298a795 Il Han 2015-08-30 358 default: > 54187ff9d766b2 Guenter Roeck 2016-07-01 359 err = -EOPNOTSUPP; > 54187ff9d766b2 Guenter Roeck 2016-07-01 360 break; > 195a4b4298a795 Il Han 2015-08-30 361 } > 195a4b4298a795 Il Han 2015-08-30 362 > 195a4b4298a795 Il Han 2015-08-30 363 return err; > 195a4b4298a795 Il Han 2015-08-30 364 } > 195a4b4298a795 Il Han 2015-08-30 365 > 54187ff9d766b2 Guenter Roeck 2016-07-01 366 static umode_t max31790_pwm_is_visible(const void *_data, u32 attr, int channel) > 195a4b4298a795 Il Han 2015-08-30 367 { > 54187ff9d766b2 Guenter Roeck 2016-07-01 368 const struct max31790_data *data = _data; > 2c8602cfaeab63 Václav Kubernát 2021-03-16 369 struct regmap *regmap = data->regmap; > 2c8602cfaeab63 Václav Kubernát 2021-03-16 370 u8 fan_config = read_reg_byte(regmap, MAX31790_REG_FAN_CONFIG(channel % NR_CHANNEL)); > 2c8602cfaeab63 Václav Kubernát 2021-03-16 371 > 2c8602cfaeab63 Václav Kubernát 2021-03-16 @372 if (fan_config < 0) > 2c8602cfaeab63 Václav Kubernát 2021-03-16 373 return 0; > 54187ff9d766b2 Guenter Roeck 2016-07-01 374 > 54187ff9d766b2 Guenter Roeck 2016-07-01 375 switch (attr) { > 54187ff9d766b2 Guenter Roeck 2016-07-01 376 case hwmon_pwm_input: > 54187ff9d766b2 Guenter Roeck 2016-07-01 377 case hwmon_pwm_enable: > 54187ff9d766b2 Guenter Roeck 2016-07-01 378 if (!(fan_config & MAX31790_FAN_CFG_TACH_INPUT)) > dc8dbb4d7672b7 Guenter Roeck 2018-12-10 379 return 0644; > 54187ff9d766b2 Guenter Roeck 2016-07-01 380 return 0; > 54187ff9d766b2 Guenter Roeck 2016-07-01 381 default: > 54187ff9d766b2 Guenter Roeck 2016-07-01 382 return 0; > 54187ff9d766b2 Guenter Roeck 2016-07-01 383 } > 54187ff9d766b2 Guenter Roeck 2016-07-01 384 } > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org