Hi Ma, kernel test robot noticed the following build warnings: [auto build test WARNING on drm-misc/drm-misc-next] [also build test WARNING on linus/master v6.6-rc4 next-20231006] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Ma-Ke/drm-i2c-ch7006-fix-a-possible-null-pointer-dereference/20231007-112036 base: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next patch link: https://lore.kernel.org/r/20231007031712.3997144-1-make_ruc2021%40163.com patch subject: [PATCH] drm/i2c/ch7006: fix a possible null pointer dereference config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20231007/202310071306.7oXVHYob-lkp@xxxxxxxxx/config) compiler: m68k-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231007/202310071306.7oXVHYob-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202310071306.7oXVHYob-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): drivers/gpu/drm/i2c/ch7006_drv.c: In function 'ch7006_encoder_get_modes': >> drivers/gpu/drm/i2c/ch7006_drv.c:239:42: warning: variable 'encoder_mode' set but not used [-Wunused-but-set-variable] 239 | struct drm_display_mode *encoder_mode; | ^~~~~~~~~~~~ vim +/encoder_mode +239 drivers/gpu/drm/i2c/ch7006_drv.c 226 227 static int ch7006_encoder_get_modes(struct drm_encoder *encoder, 228 struct drm_connector *connector) 229 { 230 struct ch7006_priv *priv = to_ch7006_priv(encoder); 231 const struct ch7006_mode *mode; 232 int n = 0; 233 234 for (mode = ch7006_modes; mode->mode.clock; mode++) { 235 if (~mode->valid_scales & 1<<priv->scale || 236 ~mode->valid_norms & 1<<priv->norm) 237 continue; 238 > 239 struct drm_display_mode *encoder_mode; 240 encoder_mode = drm_mode_duplicate(encoder->dev, &mode->mode); 241 if (!mode) 242 continue; 243 244 n++; 245 } 246 247 return n; 248 } 249 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
