Hi Li, FYI, the error/warning still remains. tree: https://github.com/Freescale/linux-fslc pr/517 head: 0156d956a951c70743d2338132662b29aeb8847d commit: 7801f9a5347345b16fc4039c7b5b612403af0234 [12732/22155] MLK-24507-3 usb: typec: tcpm: add BC charger types if power type is usb config: x86_64-randconfig-a014 (https://download.01.org/0day-ci/archive/20220113/202201130650.504Wy7MQ-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 244dd2913a43a200f5a6544d424cdc37b771028b) 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 # https://github.com/Freescale/linux-fslc/commit/7801f9a5347345b16fc4039c7b... git remote add freescale-fslc https://github.com/Freescale/linux-fslc git fetch --no-tags freescale-fslc pr/517 git checkout 7801f9a5347345b16fc4039c7b5b612403af0234 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/usb/typec/tcpm/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): case POWER_SUPPLY_PROP_USB_TYPE: ^~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/usb/typec/tcpm/tcpm.c:4734:9: note: uninitialized use occurs here return ret; ^~~ drivers/usb/typec/tcpm/tcpm.c:4707:9: note: initialize the variable 'ret' to silence this warning int ret; ^ = 0 1 warning generated. vim +/ret +4726 drivers/usb/typec/tcpm/tcpm.c 4701 4702 static int tcpm_psy_set_prop(struct power_supply *psy, 4703 enum power_supply_property psp, 4704 const union power_supply_propval *val) 4705 { 4706 struct tcpm_port *port = power_supply_get_drvdata(psy); 4707 int ret; 4708 4709 switch (psp) { 4710 case POWER_SUPPLY_PROP_ONLINE: 4711 ret = tcpm_psy_set_online(port, val); 4712 break; 4713 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 4714 if (val->intval < port->pps_data.min_volt * 1000 || 4715 val->intval > port->pps_data.max_volt * 1000) 4716 ret = -EINVAL; 4717 else 4718 ret = tcpm_pps_set_out_volt(port, val->intval / 1000); 4719 break; 4720 case POWER_SUPPLY_PROP_CURRENT_NOW: 4721 if (val->intval > port->pps_data.max_curr * 1000) 4722 ret = -EINVAL; 4723 else 4724 ret = tcpm_pps_set_op_curr(port, val->intval / 1000); 4725 break; 4727 port->usb_type = val->intval; 4728 break; 4729 default: 4730 ret = -EINVAL; 4731 break; 4732 } 4733 4734 return ret; 4735 } 4736 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org