tree: https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-playground head: 4e5fc259a7d202d7e13818052a6cdaff0f602b35 commit: 0bad0ac867f208392aaef0d39889357256e55706 [2/12] hwmon: (pmbus) Add 'phase' parameter where needed for multi-phase support config: i386-allyesconfig (attached as .config) compiler: gcc-7 (Debian 7.5.0-3) 7.5.0 reproduce: git checkout 0bad0ac867f208392aaef0d39889357256e55706 # save the attached .config to linux build tree make ARCH=i386 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/hwmon/pmbus/ibm-cffps.c: In function 'ibm_cffps_read_word_data': rc = pmbus_read_word_data(client, page, CFFPS_12VCS_VOUT_CMD); ^~~~~~~~~~~~~~~~~~~~ In file included from drivers/hwmon/pmbus/ibm-cffps.c:19:0: drivers/hwmon/pmbus/pmbus.h:462:5: note: declared here int pmbus_read_word_data(struct i2c_client *client, int page, int phase, ^~~~~~~~~~~~~~~~~~~~ vim +/pmbus_read_word_data +351 drivers/hwmon/pmbus/ibm-cffps.c f69316d62c7066 Edward A. James 2017-08-21 326 f69316d62c7066 Edward A. James 2017-08-21 327 static int ibm_cffps_read_word_data(struct i2c_client *client, int page, 0bad0ac867f208 Guenter Roeck 2020-01-14 328 int phase, int reg) f69316d62c7066 Edward A. James 2017-08-21 329 { f69316d62c7066 Edward A. James 2017-08-21 330 int rc, mfr; f69316d62c7066 Edward A. James 2017-08-21 331 f69316d62c7066 Edward A. James 2017-08-21 332 switch (reg) { f69316d62c7066 Edward A. James 2017-08-21 333 case PMBUS_STATUS_WORD: 0bad0ac867f208 Guenter Roeck 2020-01-14 334 rc = pmbus_read_word_data(client, page, phase, reg); f69316d62c7066 Edward A. James 2017-08-21 335 if (rc < 0) f69316d62c7066 Edward A. James 2017-08-21 336 return rc; f69316d62c7066 Edward A. James 2017-08-21 337 f69316d62c7066 Edward A. James 2017-08-21 338 mfr = pmbus_read_byte_data(client, page, f69316d62c7066 Edward A. James 2017-08-21 339 PMBUS_STATUS_MFR_SPECIFIC); f69316d62c7066 Edward A. James 2017-08-21 340 if (mfr < 0) f69316d62c7066 Edward A. James 2017-08-21 341 /* f69316d62c7066 Edward A. James 2017-08-21 342 * Return the status register instead of an error, f69316d62c7066 Edward A. James 2017-08-21 343 * since we successfully read status. f69316d62c7066 Edward A. James 2017-08-21 344 */ f69316d62c7066 Edward A. James 2017-08-21 345 return rc; f69316d62c7066 Edward A. James 2017-08-21 346 f69316d62c7066 Edward A. James 2017-08-21 347 if (mfr & CFFPS_MFR_PS_KILL) f69316d62c7066 Edward A. James 2017-08-21 348 rc |= PB_STATUS_OFF; f69316d62c7066 Edward A. James 2017-08-21 349 break; 1952d79a0d2635 Eddie James 2019-12-19 350 case PMBUS_VIRT_READ_VMON: 1952d79a0d2635 Eddie James 2019-12-19 @351 rc = pmbus_read_word_data(client, page, CFFPS_12VCS_VOUT_CMD); 1952d79a0d2635 Eddie James 2019-12-19 352 break; f69316d62c7066 Edward A. James 2017-08-21 353 default: f69316d62c7066 Edward A. James 2017-08-21 354 rc = -ENODATA; f69316d62c7066 Edward A. James 2017-08-21 355 break; f69316d62c7066 Edward A. James 2017-08-21 356 } f69316d62c7066 Edward A. James 2017-08-21 357 f69316d62c7066 Edward A. James 2017-08-21 358 return rc; f69316d62c7066 Edward A. James 2017-08-21 359 } f69316d62c7066 Edward A. James 2017-08-21 360 :::::: The code at line 351 was first introduced by commit :::::: 1952d79a0d2635c9130a48a598dd2f1eea70c45b hwmon: (pmbus/ibm-cffps) Add the VMON property for version 2 :::::: TO: Eddie James <eajames(a)linux.ibm.com&gt; :::::: CC: Guenter Roeck <linux(a)roeck-us.net&gt; --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation