Hi Dmitry, 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 v6.4 next-20230705] [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/Dmitry-Baryshkov/drm-msm-dpu-drop-enum-dpu_core_perf_data_bus_id/20230704-230618 base: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next patch link: https://lore.kernel.org/r/20230704150354.159882-11-dmitry.baryshkov%40linaro.org patch subject: [PATCH v2 10/14] drm/msm/dpu: use dpu_perf_cfg in DPU core_perf code config: arm-defconfig (https://download.01.org/0day-ci/archive/20230706/202307060717.jqn298i0-...@intel.com/config) compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1) reproduce: (https://download.01.org/0day-ci/archive/20230706/202307060717.jqn298i0-...@intel.com/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 <l...@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202307060717.jqn298i0-...@intel.com/ All warnings (new ones prefixed by >>): >> drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c:251:25: warning: variable >> 'kms' is uninitialized when used here [-Wuninitialized] if (atomic_dec_return(&kms->bandwidth_ref) > 0) ^~~ drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c:242:21: note: initialize the variable 'kms' to silence this warning struct dpu_kms *kms; ^ = NULL 1 warning generated. vim +/kms +251 drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 230 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 231 /** 2785fd47959003 Lee Jones 2020-11-23 232 * dpu_core_perf_crtc_release_bw() - request zero bandwidth 2785fd47959003 Lee Jones 2020-11-23 233 * @crtc: pointer to a crtc 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 234 * 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 235 * Function checks a state variable for the crtc, if all pending commit 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 236 * requests are done, meaning no more bandwidth is needed, release 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 237 * bandwidth request. 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 238 */ 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 239 void dpu_core_perf_crtc_release_bw(struct drm_crtc *crtc) 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 240 { 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 241 struct dpu_crtc *dpu_crtc; 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 242 struct dpu_kms *kms; 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 243 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 244 if (!crtc) { 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 245 DPU_ERROR("invalid crtc\n"); 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 246 return; 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 247 } 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 248 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 249 dpu_crtc = to_dpu_crtc(crtc); 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 250 241b507c166fef Rob Clark 2019-08-20 @251 if (atomic_dec_return(&kms->bandwidth_ref) > 0) 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 252 return; 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 253 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 254 /* Release the bandwidth */ 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 255 if (kms->perf.enable_bw_release) { 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 256 trace_dpu_cmd_release_bw(crtc->base.id); 5b702d787b47e1 Stephen Boyd 2021-04-30 257 DRM_DEBUG_ATOMIC("Release BW crtc=%d\n", crtc->base.id); cb88482e2570f6 Jayant Shekhar 2019-06-18 258 dpu_crtc->cur_perf.bw_ctl = 0; cb88482e2570f6 Jayant Shekhar 2019-06-18 259 _dpu_core_perf_crtc_update_bus(kms, crtc); 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 260 } 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 261 } 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 262 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
