Hi Stefan, Thank you for the patch! Yet something to improve: [auto build test ERROR on rafael-pm/linux-next] [also build test ERROR on broonie-sound/for-next linus/master v5.19-rc3 next-20220622] [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/intel-lab-lkp/linux/commits/Stefan-Binding/Read-_SUB-from-ACPI-to-be-able-to-identify-firmware/20220622-211004 base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next config: sparc64-randconfig-r002-20220622 (https://download.01.org/0day-ci/archive/20220623/202206231108.xPflWTbR-lkp@xxxxxxxxx/config) compiler: sparc64-linux-gcc (GCC) 11.3.0 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/intel-lab-lkp/linux/commit/338eadc59e88d60759ea445011a6537222b233e3 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Stefan-Binding/Read-_SUB-from-ACPI-to-be-able-to-identify-firmware/20220622-211004 git checkout 338eadc59e88d60759ea445011a6537222b233e3 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=sparc64 SHELL=/bin/bash sound/soc/codecs/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): sound/soc/codecs/cs35l41.c: In function 'cs35l41_probe_acpi': >> sound/soc/codecs/cs35l41.c:1157:32: error: invalid use of undefined type 'struct acpi_device' 1157 | ret = acpi_get_sub(adev->handle, sub, sizeof(sub)); | ^~ vim +1157 sound/soc/codecs/cs35l41.c 1145 1146 static int cs35l41_probe_acpi(struct cs35l41_private *cs35l41) 1147 { 1148 struct acpi_device *adev; 1149 int ret; 1150 char sub[ACPI_MAX_SUB_BUF_SIZE]; 1151 1152 adev = ACPI_COMPANION(cs35l41->dev); 1153 /* If there is no ACPI_COMPANION, there is no ACPI for this system, return 0 */ 1154 if (!adev) 1155 return 0; 1156 > 1157 ret = acpi_get_sub(adev->handle, sub, sizeof(sub)); 1158 if (ret < 0) 1159 return ret; 1160 1161 cs35l41->dsp.system_name = devm_kstrdup(cs35l41->dev, sub, GFP_KERNEL); 1162 if (!cs35l41->dsp.system_name) 1163 return -ENOMEM; 1164 1165 return 0; 1166 } 1167 -- 0-DAY CI Kernel Test Service https://01.org/lkp