Hi Kirill, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on abelloni/rtc-next] [also build test WARNING on v5.12-rc5 next-20210326] [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/Kirill-Kapranov/rtc-abx80x-Enable-distributed-digital-calibration/20210329-053233 base: https://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux.git rtc-next config: arm-randconfig-r034-20210329 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 821547cabb5819ed42245376a9afcd11cdee5ddd) 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 # install arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://github.com/0day-ci/linux/commit/3f6d456de4f347f0d2fd0af648b1ca21b1212d17 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Kirill-Kapranov/rtc-abx80x-Enable-distributed-digital-calibration/20210329-053233 git checkout 3f6d456de4f347f0d2fd0af648b1ca21b1212d17 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm 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/rtc/rtc-abx80x.c:533:6: warning: variable 'retval' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized] if (reg_sqw.val < 0) ^~~~~~~~~~~~~~~ drivers/rtc/rtc-abx80x.c:561:9: note: uninitialized use occurs here return retval; ^~~~~~ drivers/rtc/rtc-abx80x.c:533:2: note: remove the 'if' if its condition is always false if (reg_sqw.val < 0) ^~~~~~~~~~~~~~~~~~~~ drivers/rtc/rtc-abx80x.c:530:12: note: initialize the variable 'retval' to silence this warning int retval; ^ = 0 1 warning generated. vim +533 drivers/rtc/rtc-abx80x.c 526 527 static int sqw_set(struct i2c_client *client, const char *buf) 528 { 529 union abx8xx_reg_sqw reg_sqw; 530 int retval; 531 532 reg_sqw.val = i2c_smbus_read_byte_data(client, ABX8XX_REG_SQW); > 533 if (reg_sqw.val < 0) 534 goto err; 535 536 if (sysfs_streq(buf, "none")) { 537 reg_sqw.sqwe = 0; 538 dev_info(&client->dev, "sqw output disabled\n"); 539 } else { 540 int idx = __sysfs_match_string(sqfs, SQFS_COUNT, buf); 541 542 if (idx < 0) 543 return idx; 544 545 if (abx80x_is_rc_mode(client) && !valid_for_rc_mode[idx]) 546 dev_warn(&client->dev, "sqw frequency %s valid only in xt mode\n", 547 sqfs[idx]); 548 549 dev_info(&client->dev, "sqw output enabled @ %s\n", sqfs[idx]); 550 reg_sqw.sqwe = 1; 551 reg_sqw.sqws = idx; 552 } 553 554 retval = i2c_smbus_write_byte_data(client, ABX8XX_REG_SQW, reg_sqw.val); 555 if (retval < 0) 556 goto err; 557 558 return 0; 559 err: 560 dev_err(&client->dev, "Failed to set SQW\n"); 561 return retval; 562 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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