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Thu, 08 Jun 2023 16:03:24 +0000 Date: Fri, 9 Jun 2023 00:02:36 +0800 From: kernel test robot To: Jani Nikula Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Ville =?iso-8859-1?Q?Syrj=E4l=E4?= Subject: drivers/gpu/drm/drm_edid.c:6150:13: warning: stack frame size (2928) exceeds limit (2048) in 'drm_parse_cea_ext' Message-ID: <202306082341.ZzRYSSEX-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Jani, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 5f63595ebd82f56a2dd36ca013dd7f5ff2e2416a commit: e1e7bc481d49c3e3ada11029ce0d9b85a0a539d7 drm/edid: convert to device specific logging date: 8 months ago config: riscv-randconfig-r012-20230608 (https://download.01.org/0day-ci/archive/20230608/202306082341.ZzRYSSEX-lkp@intel.com/config) compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1) reproduce (this is a W=1 build): mkdir -p ~/bin wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e1e7bc481d49c3e3ada11029ce0d9b85a0a539d7 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout e1e7bc481d49c3e3ada11029ce0d9b85a0a539d7 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=riscv olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash drivers/gpu/drm/ fs/f2fs/ kernel/bpf/ lib/zstd/ 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 | Closes: https://lore.kernel.org/oe-kbuild-all/202306082341.ZzRYSSEX-lkp@intel.com/ All warnings (new ones prefixed by >>): >> drivers/gpu/drm/drm_edid.c:6150:13: warning: stack frame size (2928) exceeds limit (2048) in 'drm_parse_cea_ext' [-Wframe-larger-than] static void drm_parse_cea_ext(struct drm_connector *connector, ^ 1 warning generated. vim +/drm_parse_cea_ext +6150 drivers/gpu/drm/drm_edid.c 2869f599c0d8c9 Philipp Zabel 2022-01-23 6149 1cea146a806ae1 Ville Syrjälä 2016-09-28 @6150 static void drm_parse_cea_ext(struct drm_connector *connector, e42192b4c345a8 Jani Nikula 2022-05-11 6151 const struct drm_edid *drm_edid) 1cea146a806ae1 Ville Syrjälä 2016-09-28 6152 { 1cea146a806ae1 Ville Syrjälä 2016-09-28 6153 struct drm_display_info *info = &connector->display_info; 8db73897698ccb Jani Nikula 2022-05-05 6154 struct drm_edid_iter edid_iter; dfc0312596561a Jani Nikula 2022-05-03 6155 const struct cea_db *db; dfc0312596561a Jani Nikula 2022-05-03 6156 struct cea_db_iter iter; 1cea146a806ae1 Ville Syrjälä 2016-09-28 6157 const u8 *edid_ext; 1cea146a806ae1 Ville Syrjälä 2016-09-28 6158 bbded689680f0f Jani Nikula 2022-05-09 6159 drm_edid_iter_begin(drm_edid, &edid_iter); 8db73897698ccb Jani Nikula 2022-05-05 6160 drm_edid_iter_for_each(edid_ext, &edid_iter) { 8db73897698ccb Jani Nikula 2022-05-05 6161 if (edid_ext[0] != CEA_EXT) 8db73897698ccb Jani Nikula 2022-05-05 6162 continue; 1cea146a806ae1 Ville Syrjälä 2016-09-28 6163 8db73897698ccb Jani Nikula 2022-05-05 6164 if (!info->cea_rev) 1cea146a806ae1 Ville Syrjälä 2016-09-28 6165 info->cea_rev = edid_ext[1]; 1cea146a806ae1 Ville Syrjälä 2016-09-28 6166 8db73897698ccb Jani Nikula 2022-05-05 6167 if (info->cea_rev != edid_ext[1]) e1e7bc481d49c3 Jani Nikula 2022-10-24 6168 drm_dbg_kms(connector->dev, e1e7bc481d49c3 Jani Nikula 2022-10-24 6169 "[CONNECTOR:%d:%s] CEA extension version mismatch %u != %u\n", e1e7bc481d49c3 Jani Nikula 2022-10-24 6170 connector->base.id, connector->name, 8db73897698ccb Jani Nikula 2022-05-05 6171 info->cea_rev, edid_ext[1]); 7344bad7fb6daa Jani Nikula 2022-03-23 6172 8db73897698ccb Jani Nikula 2022-05-05 6173 /* The existence of a CTA extension should imply RGB support */ 8db73897698ccb Jani Nikula 2022-05-05 6174 info->color_formats = DRM_COLOR_FORMAT_RGB444; 1cea146a806ae1 Ville Syrjälä 2016-09-28 6175 if (edid_ext[3] & EDID_CEA_YCRCB444) c03d0b52ff71d5 Maxime Ripard 2022-01-20 6176 info->color_formats |= DRM_COLOR_FORMAT_YCBCR444; 1cea146a806ae1 Ville Syrjälä 2016-09-28 6177 if (edid_ext[3] & EDID_CEA_YCRCB422) c03d0b52ff71d5 Maxime Ripard 2022-01-20 6178 info->color_formats |= DRM_COLOR_FORMAT_YCBCR422; 7344bad7fb6daa Jani Nikula 2022-03-23 6179 } 8db73897698ccb Jani Nikula 2022-05-05 6180 drm_edid_iter_end(&edid_iter); 1cea146a806ae1 Ville Syrjälä 2016-09-28 6181 5e87b2e5171621 Jani Nikula 2022-05-09 6182 cea_db_iter_edid_begin(drm_edid, &iter); dfc0312596561a Jani Nikula 2022-05-03 6183 cea_db_iter_for_each(db, &iter) { dfc0312596561a Jani Nikula 2022-05-03 6184 /* FIXME: convert parsers to use struct cea_db */ dfc0312596561a Jani Nikula 2022-05-03 6185 const u8 *data = (const u8 *)db; 1cea146a806ae1 Ville Syrjälä 2016-09-28 6186 23ebf8b9eab915 Ville Syrjälä 2016-09-28 6187 if (cea_db_is_hdmi_vsdb(db)) dfc0312596561a Jani Nikula 2022-05-03 6188 drm_parse_hdmi_vsdb_video(connector, data); be982415fc2e95 Jani Nikula 2022-05-09 6189 else if (cea_db_is_hdmi_forum_vsdb(db) || 115fcf5899f7e0 Lee Shawn C 2022-05-03 6190 cea_db_is_hdmi_forum_scdb(db)) dfc0312596561a Jani Nikula 2022-05-03 6191 drm_parse_hdmi_forum_scds(connector, data); be982415fc2e95 Jani Nikula 2022-05-09 6192 else if (cea_db_is_microsoft_vsdb(db)) dfc0312596561a Jani Nikula 2022-05-03 6193 drm_parse_microsoft_vsdb(connector, data); be982415fc2e95 Jani Nikula 2022-05-09 6194 else if (cea_db_is_y420cmdb(db)) dfc0312596561a Jani Nikula 2022-05-03 6195 drm_parse_y420cmdb_bitmap(connector, data); be982415fc2e95 Jani Nikula 2022-05-09 6196 else if (cea_db_is_vcdb(db)) dfc0312596561a Jani Nikula 2022-05-03 6197 drm_parse_vcdb(connector, data); be982415fc2e95 Jani Nikula 2022-05-09 6198 else if (cea_db_is_hdmi_hdr_metadata_block(db)) dfc0312596561a Jani Nikula 2022-05-03 6199 drm_parse_hdr_metadata_block(connector, data); 1cea146a806ae1 Ville Syrjälä 2016-09-28 6200 } dfc0312596561a Jani Nikula 2022-05-03 6201 cea_db_iter_end(&iter); d0c94692e0a360 Mario Kleiner 2014-03-27 6202 } d0c94692e0a360 Mario Kleiner 2014-03-27 6203 :::::: The code at line 6150 was first introduced by commit :::::: 1cea146a806ae1f34cb1b5e3206ff63a2bb90782 drm/edid: Reduce the number of times we parse the CEA extension block :::::: TO: Ville Syrjälä :::::: CC: Daniel Vetter -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki