Hi AngeloGioacchino, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on drm/drm-next] [also build test WARNING on v5.15-rc7 next-20211029] [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/AngeloGioacchino-Del-Regno/drm-bridge-parade-ps8640-Don-t-try-to-enable-VDO-if-poweron-fails/20211029-212903 base: git://anongit.freedesktop.org/drm/drm drm-next config: arm-randconfig-r012-20211029 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 5db7568a6a1fcb408eb8988abdaff2a225a8eb72) 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/a04870beda522c60c8604006667038a096f1cbd4 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review AngeloGioacchino-Del-Regno/drm-bridge-parade-ps8640-Don-t-try-to-enable-VDO-if-poweron-fails/20211029-212903 git checkout a04870beda522c60c8604006667038a096f1cbd4 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 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/gpu/drm/bridge/parade-ps8640.c:304:47: warning: variable 'ret' is uninitialized when used here [-Wuninitialized] DRM_ERROR("cannot disable regulators %d\n", ret); ^~~ include/drm/drm_print.h:518:19: note: expanded from macro 'DRM_ERROR' __drm_err(fmt, ##__VA_ARGS__) ^~~~~~~~~~~ drivers/gpu/drm/bridge/parade-ps8640.c:298:9: note: initialize the variable 'ret' to silence this warning int ret; ^ = 0 1 warning generated. vim +/ret +304 drivers/gpu/drm/bridge/parade-ps8640.c 295 296 static void __ps8640_bridge_poweroff(struct ps8640 *ps_bridge) 297 { 298 int ret; 299 300 gpiod_set_value(ps_bridge->gpio_reset, 1); 301 gpiod_set_value(ps_bridge->gpio_powerdown, 1); 302 if (regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies), 303 ps_bridge->supplies)) { > 304 DRM_ERROR("cannot disable regulators %d\n", ret); 305 } 306 } 307 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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