Hi Kate, Thank you for the patch! Yet something to improve: [auto build test ERROR on sre-power-supply/for-next] [also build test ERROR on v5.15-rc5] [cannot apply to next-20211013] [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/Kate-Hsuan/power-supply-axp288-c... base: https://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply.git for-next config: x86_64-randconfig-a004-20211004 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/f9d2d930e04a8ae3368545c472183e508... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Kate-Hsuan/power-supply-axp288-charger-Optimize-register-reading-method/20211012-134702 git checkout f9d2d930e04a8ae3368545c472183e5085d0c687 # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/power/supply/axp288_charger.c: In function 'axp288_charger_usb_update_property': 411 | ret = iosf_mbi_block_punit_i2c_access(); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 430 | iosf_mbi_unblock_punit_i2c_access(); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/iosf_mbi_block_punit_i2c_access +411 drivers/power/supply/axp288_charger.c 401 402 static int axp288_charger_usb_update_property(struct axp288_chrg_info *info) 403 { 404 int ret = 0; 405 406 if (info->valid && time_before(jiffies, info->last_updated + AXP288_REG_UPDATE_INTERVAL)) 407 return 0; 408 409 dev_dbg(&info->pdev->dev, "Charger updating register values...\n"); 410 412 if (ret < 0) 413 return ret; 414 415 ret = axp288_charger_reg_readb(info, AXP20X_PWR_INPUT_STATUS, &info->input_status); 416 if (ret < 0) 417 goto out; 418 419 ret = axp288_charger_reg_readb(info, AXP20X_PWR_OP_MODE, &info->op_mode); 420 if (ret < 0) 421 goto out; 422 423 ret = axp288_charger_reg_readb(info, AXP20X_CHRG_BAK_CTRL, &info->backend_control); 424 if (ret < 0) 425 goto out; 426 427 info->last_updated = jiffies; 428 info->valid = true; 429 out: 431 return ret; 432 } 433 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org