Hi Thomas, I love your patch! Perhaps something to improve: [auto build test WARNING on drm/drm-next] [also build test WARNING on drm-exynos/exynos-drm-next drm-intel/for-linux-next drm-tip/drm-tip tegra-drm/drm/tegra/for-next v5.18-rc5 next-20220505] [cannot apply to airlied/drm-next] [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/Thomas-Zimmermann/drm-mgag200-Fail-on-I2C-initialization-errors/20220505-234643 base: git://anongit.freedesktop.org/drm/drm drm-next config: i386-randconfig-a013 (https://download.01.org/0day-ci/archive/20220506/202205060439.bfJ2FmzU-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 5e004fb787698440a387750db7f8028e7cb14cfc) 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/11682b9fc557a02edac08b0dedc91ce704c2f749 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Thomas-Zimmermann/drm-mgag200-Fail-on-I2C-initialization-errors/20220505-234643 git checkout 11682b9fc557a02edac08b0dedc91ce704c2f749 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/gpu/drm/mgag200/ 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/mgag200/mgag200_mode.c:819:47: warning: variable 'ret' is uninitialized when used here [-Wuninitialized] drm_err(dev, "failed to add DDC bus: %d\n", ret); ^~~ include/drm/drm_print.h:438:46: note: expanded from macro 'drm_err' __drm_printk((drm), err,, "*ERROR* " fmt, ##__VA_ARGS__) ^~~~~~~~~~~ include/drm/drm_print.h:425:48: note: expanded from macro '__drm_printk' dev_##level##type((drm)->dev, "[drm] " fmt, ##__VA_ARGS__) ^~~~~~~~~~~ include/linux/dev_printk.h:144:65: note: expanded from macro 'dev_err' dev_printk_index_wrap(_dev_err, KERN_ERR, dev, dev_fmt(fmt), ##__VA_ARGS__) ^~~~~~~~~~~ include/linux/dev_printk.h:110:23: note: expanded from macro 'dev_printk_index_wrap' _p_func(dev, fmt, ##__VA_ARGS__); \ ^~~~~~~~~~~ drivers/gpu/drm/mgag200/mgag200_mode.c:815:9: note: initialize the variable 'ret' to silence this warning int ret; ^ = 0 1 warning generated. vim +/ret +819 drivers/gpu/drm/mgag200/mgag200_mode.c 808 809 static int mgag200_vga_connector_init(struct mga_device *mdev) 810 { 811 struct drm_device *dev = &mdev->base; 812 struct mga_connector *mconnector = &mdev->connector; 813 struct drm_connector *connector = &mconnector->base; 814 struct mga_i2c_chan *i2c; 815 int ret; 816 817 i2c = mgag200_i2c_create(dev); 818 if (IS_ERR(i2c)) { > 819 drm_err(dev, "failed to add DDC bus: %d\n", ret); 820 return PTR_ERR(i2c); 821 } 822 823 ret = drm_connector_init_with_ddc(dev, connector, 824 &mga_vga_connector_funcs, 825 DRM_MODE_CONNECTOR_VGA, 826 &i2c->adapter); 827 if (ret) 828 goto err_mgag200_i2c_destroy; 829 drm_connector_helper_add(connector, &mga_vga_connector_helper_funcs); 830 831 mconnector->i2c = i2c; 832 833 return 0; 834 835 err_mgag200_i2c_destroy: 836 mgag200_i2c_destroy(i2c); 837 return ret; 838 } 839 -- 0-DAY CI Kernel Test Service https://01.org/lkp
