Hi Colin, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on net-next/master] url: https://github.com/0day-ci/linux/commits/Colin-Foster/add-support-for-VSC... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 3ad4b7c81a992463c29ae130332c217607fe4452 config: riscv-randconfig-c006-20211118 (attached as .config) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://github.com/0day-ci/linux/commit/8d6a114c41cb19366dd219bc99ec7fdf6... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Colin-Foster/add-support-for-VSC75XX-control-over-SPI/20211116-143245 git checkout 8d6a114c41cb19366dd219bc99ec7fdf68ac3653 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv clang-analyzer If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; clang-analyzer warnings: (new ones prefixed by >>) ret = 0; ^ ~ vim +/ret +877 drivers/pinctrl/pinctrl-ocelot.c 8d6a114c41cb19 Colin Foster 2021-11-15 867 f8a7476077eaac Lars Povlsen 2020-06-15 868 static int ocelot_hw_set_value(struct ocelot_pinctrl *info, f8a7476077eaac Lars Povlsen 2020-06-15 869 unsigned int pin, f8a7476077eaac Lars Povlsen 2020-06-15 870 unsigned int reg, f8a7476077eaac Lars Povlsen 2020-06-15 871 int val) f8a7476077eaac Lars Povlsen 2020-06-15 872 { f8a7476077eaac Lars Povlsen 2020-06-15 873 int ret = -EOPNOTSUPP; f8a7476077eaac Lars Povlsen 2020-06-15 874 f8a7476077eaac Lars Povlsen 2020-06-15 875 if (info->pincfg) { f8a7476077eaac Lars Povlsen 2020-06-15 876 f8a7476077eaac Lars Povlsen 2020-06-15 @877 ret = 0; f8a7476077eaac Lars Povlsen 2020-06-15 878 switch (reg) { f8a7476077eaac Lars Povlsen 2020-06-15 879 case PINCONF_BIAS: 8d6a114c41cb19 Colin Foster 2021-11-15 880 ret = ocelot_pincfg_clrsetbits(info, pin, BIAS_BITS, 8d6a114c41cb19 Colin Foster 2021-11-15 881 val); f8a7476077eaac Lars Povlsen 2020-06-15 882 break; f8a7476077eaac Lars Povlsen 2020-06-15 883 f8a7476077eaac Lars Povlsen 2020-06-15 884 case PINCONF_SCHMITT: 8d6a114c41cb19 Colin Foster 2021-11-15 885 ret = ocelot_pincfg_clrsetbits(info, pin, SCHMITT_BIT, 8d6a114c41cb19 Colin Foster 2021-11-15 886 val); f8a7476077eaac Lars Povlsen 2020-06-15 887 break; f8a7476077eaac Lars Povlsen 2020-06-15 888 f8a7476077eaac Lars Povlsen 2020-06-15 889 case PINCONF_DRIVE_STRENGTH: f8a7476077eaac Lars Povlsen 2020-06-15 890 if (val <= 3) 8d6a114c41cb19 Colin Foster 2021-11-15 891 ret = ocelot_pincfg_clrsetbits(info, pin, 8d6a114c41cb19 Colin Foster 2021-11-15 892 DRIVE_BITS, val); f8a7476077eaac Lars Povlsen 2020-06-15 893 else f8a7476077eaac Lars Povlsen 2020-06-15 894 ret = -EINVAL; f8a7476077eaac Lars Povlsen 2020-06-15 895 break; f8a7476077eaac Lars Povlsen 2020-06-15 896 f8a7476077eaac Lars Povlsen 2020-06-15 897 default: f8a7476077eaac Lars Povlsen 2020-06-15 898 ret = -EOPNOTSUPP; f8a7476077eaac Lars Povlsen 2020-06-15 899 break; f8a7476077eaac Lars Povlsen 2020-06-15 900 } f8a7476077eaac Lars Povlsen 2020-06-15 901 } f8a7476077eaac Lars Povlsen 2020-06-15 902 return ret; f8a7476077eaac Lars Povlsen 2020-06-15 903 } f8a7476077eaac Lars Povlsen 2020-06-15 904 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org