From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============6943738553393943721==" MIME-Version: 1.0 From: kernel test robot Subject: [linux-next:master 1767/8646] drivers/memory/tegra/tegra30-emc.c:1164:3: warning: Value stored to 'dram_type_str' is never read [clang-analyzer-deadcode.DeadStores] Date: Sat, 26 Feb 2022 05:07:15 +0800 Message-ID: <202202260552.TPnzbKMS-lkp@intel.com> List-Id: To: kbuild@lists.01.org --===============6943738553393943721== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable CC: llvm(a)lists.linux.dev CC: kbuild-all(a)lists.01.org BCC: lkp(a)intel.com CC: Linux Memory Management List TO: Dmitry Osipenko CC: Krzysztof Kozlowski tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git= master head: 44948bd49d878dad6c9707e34f4a06df73c3a800 commit: e3aabb3c7dbe66201b45d7b2c20132196f491ad4 [1767/8646] memory: tegra3= 0-emc: Print additional memory info :::::: branch date: 19 hours ago :::::: commit date: 4 weeks ago config: arm-randconfig-c002-20220223 (https://download.01.org/0day-ci/archi= ve/20220226/202202260552.TPnzbKMS-lkp(a)intel.com/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc= 04d5b97b12e6b797c6067d3c96a8d7470e) reproduce (this is a W=3D1 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://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.g= it/commit/?id=3De3aabb3c7dbe66201b45d7b2c20132196f491ad4 git remote add linux-next https://git.kernel.org/pub/scm/linux/kern= el/git/next/linux-next.git git fetch --no-tags linux-next master git checkout e3aabb3c7dbe66201b45d7b2c20132196f491ad4 # save the config file to linux build tree COMPILER_INSTALL_PATH=3D$HOME/0day COMPILER=3Dclang make.cross ARCH= =3Darm clang-analyzer = If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot clang-analyzer warnings: (new ones prefixed by >>) drivers/media/tuners/tuner-xc2028.c:1037:3: note: Value stored to 'rc' i= s never read Suppressed 2 warnings (2 with check filters). 2 warnings generated. Suppressed 2 warnings (2 with check filters). 2 warnings generated. drivers/media/v4l2-core/videobuf-core.c:712:10: warning: Access to field= 'state' results in a dereference of a null pointer (loaded from variable '= buf') [clang-analyzer-core.NullDereference] switch (buf->state) { ^~~ drivers/media/v4l2-core/videobuf-core.c:698:2: note: 'buf' initialized t= o a null pointer value struct videobuf_buffer *buf =3D NULL; ^~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/media/v4l2-core/videobuf-core.c:701:2: note: Assuming field 'mag= ic' is equal to 304484355 MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); ^ drivers/media/v4l2-core/videobuf-core.c:27:16: note: expanded from macro= 'MAGIC_CHECK' if (unlikely((is) !=3D (should))) { = \ ~~~~~~~~~^~~~~~~~~~~~~~~~~ include/linux/compiler.h:78:42: note: expanded from macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^ drivers/media/v4l2-core/videobuf-core.c:701:2: note: Taking false branch MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); ^ drivers/media/v4l2-core/videobuf-core.c:27:3: note: expanded from macro = 'MAGIC_CHECK' if (unlikely((is) !=3D (should))) { = \ ^ drivers/media/v4l2-core/videobuf-core.c:701:2: note: Loop condition is f= alse. Exiting loop MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); ^ drivers/media/v4l2-core/videobuf-core.c:26:2: note: expanded from macro = 'MAGIC_CHECK' do { \ ^ drivers/media/v4l2-core/videobuf-core.c:706:11: note: Calling 'stream_ne= xt_buffer' retval =3D stream_next_buffer(q, &buf, nonblocking); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/media/v4l2-core/videobuf-core.c:682:6: note: Assuming 'retval' i= s not equal to 0 if (retval) ^~~~~~ drivers/media/v4l2-core/videobuf-core.c:682:2: note: Taking true branch if (retval) ^ drivers/media/v4l2-core/videobuf-core.c:683:3: note: Control jumps to li= ne 692 goto done; ^ drivers/media/v4l2-core/videobuf-core.c:692:2: note: Returning without w= riting to '*vb' return retval; ^ drivers/media/v4l2-core/videobuf-core.c:706:11: note: Returning from 'st= ream_next_buffer' retval =3D stream_next_buffer(q, &buf, nonblocking); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/media/v4l2-core/videobuf-core.c:707:6: note: Assuming 'retval' i= s >=3D 0 if (retval < 0) { ^~~~~~~~~~ drivers/media/v4l2-core/videobuf-core.c:707:2: note: Taking false branch if (retval < 0) { ^ drivers/media/v4l2-core/videobuf-core.c:712:10: note: Access to field 's= tate' results in a dereference of a null pointer (loaded from variable 'buf= ') switch (buf->state) { ^~~ Suppressed 1 warnings (1 with check filters). 1 warning generated. drivers/input/keyboard/lm8323.c:333:3: warning: Value stored to 'active'= is never read [clang-analyzer-deadcode.DeadStores] active =3D debounce + 3; ^ ~~~~~~~~~~~~ drivers/input/keyboard/lm8323.c:333:3: note: Value stored to 'active' is= never read active =3D debounce + 3; ^ ~~~~~~~~~~~~ 1 warning generated. lib/xarray.c:2029:18: warning: Value stored to 'node' during its initial= ization is never read [clang-analyzer-deadcode.DeadStores] struct xa_node *node =3D xas->xa_node; ^~~~ ~~~~~~~~~~~~ lib/xarray.c:2029:18: note: Value stored to 'node' during its initializa= tion is never read struct xa_node *node =3D xas->xa_node; ^~~~ ~~~~~~~~~~~~ 4 warnings generated. drivers/memory/tegra/tegra20-emc.c:645:3: warning: Value stored to 'dram= _type_str' is never read [clang-analyzer-deadcode.DeadStores] dram_type_str =3D "INVALID"; ^ ~~~~~~~~~ drivers/memory/tegra/tegra20-emc.c:645:3: note: Value stored to 'dram_ty= pe_str' is never read dram_type_str =3D "INVALID"; ^ ~~~~~~~~~ drivers/memory/tegra/tegra20-emc.c:648:3: warning: Value stored to 'dram= _type_str' is never read [clang-analyzer-deadcode.DeadStores] dram_type_str =3D "DDR1"; ^ ~~~~~~ drivers/memory/tegra/tegra20-emc.c:648:3: note: Value stored to 'dram_ty= pe_str' is never read dram_type_str =3D "DDR1"; ^ ~~~~~~ drivers/memory/tegra/tegra20-emc.c:651:3: warning: Value stored to 'dram= _type_str' is never read [clang-analyzer-deadcode.DeadStores] dram_type_str =3D "LPDDR2"; ^ ~~~~~~~~ drivers/memory/tegra/tegra20-emc.c:651:3: note: Value stored to 'dram_ty= pe_str' is never read dram_type_str =3D "LPDDR2"; ^ ~~~~~~~~ drivers/memory/tegra/tegra20-emc.c:654:3: warning: Value stored to 'dram= _type_str' is never read [clang-analyzer-deadcode.DeadStores] dram_type_str =3D "DDR2"; ^ ~~~~~~ drivers/memory/tegra/tegra20-emc.c:654:3: note: Value stored to 'dram_ty= pe_str' is never read dram_type_str =3D "DDR2"; ^ ~~~~~~ 4 warnings generated. >> drivers/memory/tegra/tegra30-emc.c:1164:3: warning: Value stored to 'dra= m_type_str' is never read [clang-analyzer-deadcode.DeadStores] dram_type_str =3D "DDR1"; ^ ~~~~~~ drivers/memory/tegra/tegra30-emc.c:1164:3: note: Value stored to 'dram_t= ype_str' is never read dram_type_str =3D "DDR1"; ^ ~~~~~~ drivers/memory/tegra/tegra30-emc.c:1167:3: warning: Value stored to 'dra= m_type_str' is never read [clang-analyzer-deadcode.DeadStores] dram_type_str =3D "LPDDR2"; ^ ~~~~~~~~ drivers/memory/tegra/tegra30-emc.c:1167:3: note: Value stored to 'dram_t= ype_str' is never read dram_type_str =3D "LPDDR2"; ^ ~~~~~~~~ drivers/memory/tegra/tegra30-emc.c:1170:3: warning: Value stored to 'dra= m_type_str' is never read [clang-analyzer-deadcode.DeadStores] dram_type_str =3D "DDR2"; ^ ~~~~~~ drivers/memory/tegra/tegra30-emc.c:1170:3: note: Value stored to 'dram_t= ype_str' is never read dram_type_str =3D "DDR2"; ^ ~~~~~~ drivers/memory/tegra/tegra30-emc.c:1173:3: warning: Value stored to 'dra= m_type_str' is never read [clang-analyzer-deadcode.DeadStores] dram_type_str =3D "DDR3"; ^ ~~~~~~ drivers/memory/tegra/tegra30-emc.c:1173:3: note: Value stored to 'dram_t= ype_str' is never read dram_type_str =3D "DDR3"; ^ ~~~~~~ 1 warning generated. Suppressed 1 warnings (1 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 1 warning generated. Suppressed 1 warnings (1 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 1 warning generated. drivers/staging/ks7010/ks_wlan_net.c:2104:2: warning: Value stored to 'p= ' is never read [clang-analyzer-deadcode.DeadStores] p =3D memcpy(priv->wps.ie + 1, p, len); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/staging/ks7010/ks_wlan_net.c:2104:2: note: Value stored to 'p' i= s never read p =3D memcpy(priv->wps.ie + 1, p, len); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2 warnings generated. drivers/media/tuners/fc0011.c:252:3: warning: Value stored to 'bandwidth= ' is never read [clang-analyzer-deadcode.DeadStores] bandwidth =3D 6000; ^ ~~~~ drivers/media/tuners/fc0011.c:252:3: note: Value stored to 'bandwidth' i= s never read bandwidth =3D 6000; ^ ~~~~ Suppressed 1 warnings (1 with check filters). 1 warning generated. Suppressed 1 warnings (1 with check filters). 3 warnings generated. drivers/media/tuners/it913x.c:151:26: warning: Value stored to 'pdev' du= ring its initialization is never read [clang-analyzer-deadcode.DeadStores] struct platform_device *pdev =3D dev->pdev; ^~~~ ~~~~~~~~~ drivers/media/tuners/it913x.c:151:26: note: Value stored to 'pdev' durin= g its initialization is never read struct platform_device *pdev =3D dev->pdev; ^~~~ ~~~~~~~~~ drivers/media/tuners/it913x.c:210:26: warning: Value stored to 'pdev' du= ring its initialization is never read [clang-analyzer-deadcode.DeadStores] struct platform_device *pdev =3D dev->pdev; ^~~~ ~~~~~~~~~ drivers/media/tuners/it913x.c:210:26: note: Value stored to 'pdev' durin= g its initialization is never read struct platform_device *pdev =3D dev->pdev; ^~~~ ~~~~~~~~~ Suppressed 1 warnings (1 with check filters). 2 warnings generated. drivers/media/tuners/m88rs6000t.c:475:25: warning: Value stored to 'dev'= during its initialization is never read [clang-analyzer-deadcode.DeadStore= s] struct m88rs6000t_dev *dev =3D fe->tuner_priv; ^~~ ~~~~~~~~~~~~~~ drivers/media/tuners/m88rs6000t.c:475:25: note: Value stored to 'dev' du= ring its initialization is never read struct m88rs6000t_dev *dev =3D fe->tuner_priv; ^~~ ~~~~~~~~~~~~~~ Suppressed 1 warnings (1 with check filters). 1 warning generated. Suppressed 1 warnings (1 with check filters). 1 warning generated. Suppressed 1 warnings (1 with check filters). 2 warnings generated. lib/radix-tree.c:1046:3: warning: 4th function call argument is an unini= tialized value [clang-analyzer-core.CallAndMessage] node_tag_clear(root, parent, tag, offset); ^ ~~~~~~ lib/radix-tree.c:1032:2: note: 'offset' declared without an initial value int offset; ^~~~~~~~~~ lib/radix-tree.c:1035:6: note: Assuming 'index' is <=3D 'maxindex' if (index > maxindex) ^~~~~~~~~~~~~~~~ lib/radix-tree.c:1035:2: note: Taking false branch if (index > maxindex) ^ lib/radix-tree.c:1040:2: note: Loop condition is false. Execution contin= ues on line 1045 while (radix_tree_is_internal_node(node)) { ^ lib/radix-tree.c:1045:6: note: Assuming 'node' is non-null if (node) ^~~~ lib/radix-tree.c:1045:2: note: Taking true branch if (node) ^ lib/radix-tree.c:1046:3: note: 4th function call argument is an uninitia= lized value node_tag_clear(root, parent, tag, offset); ^ ~~~~~~ Suppressed 1 warnings (1 with check filters). 1 warning generated. drivers/input/keyboard/atkbd.c:1078:17: warning: Value stored to 'dev' d= uring its initialization is never read [clang-analyzer-deadcode.DeadStores] vim +/dram_type_str +1164 drivers/memory/tegra/tegra30-emc.c e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1117 = e34212c75a6899 Dmitry Osipenko 2019-08-12 1118 static int emc_setup_hw(st= ruct tegra_emc *emc) e34212c75a6899 Dmitry Osipenko 2019-08-12 1119 { e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1120 u32 fbio_cfg5, emc_cfg, e= mc_dbg, emc_adr_cfg; 930c68180ffb05 Dmitry Osipenko 2020-03-19 1121 u32 intmask =3D EMC_REFRE= SH_OVERFLOW_INT; e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1122 static bool print_sdram_i= nfo_once; e34212c75a6899 Dmitry Osipenko 2019-08-12 1123 enum emc_dram_type dram_t= ype; e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1124 const char *dram_type_str; e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1125 unsigned int emem_numdev; e34212c75a6899 Dmitry Osipenko 2019-08-12 1126 = e34212c75a6899 Dmitry Osipenko 2019-08-12 1127 fbio_cfg5 =3D readl_relax= ed(emc->regs + EMC_FBIO_CFG5); e34212c75a6899 Dmitry Osipenko 2019-08-12 1128 dram_type =3D fbio_cfg5 &= EMC_FBIO_CFG5_DRAM_TYPE_MASK; e34212c75a6899 Dmitry Osipenko 2019-08-12 1129 = e34212c75a6899 Dmitry Osipenko 2019-08-12 1130 emc_cfg =3D readl_relaxed= (emc->regs + EMC_CFG_2); e34212c75a6899 Dmitry Osipenko 2019-08-12 1131 = e34212c75a6899 Dmitry Osipenko 2019-08-12 1132 /* enable EMC and CAR to = handshake on PLL divider/source changes */ e34212c75a6899 Dmitry Osipenko 2019-08-12 1133 emc_cfg |=3D EMC_CLKCHANG= E_REQ_ENABLE; e34212c75a6899 Dmitry Osipenko 2019-08-12 1134 = e34212c75a6899 Dmitry Osipenko 2019-08-12 1135 /* configure clock change= mode accordingly to DRAM type */ e34212c75a6899 Dmitry Osipenko 2019-08-12 1136 switch (dram_type) { e34212c75a6899 Dmitry Osipenko 2019-08-12 1137 case DRAM_TYPE_LPDDR2: e34212c75a6899 Dmitry Osipenko 2019-08-12 1138 emc_cfg |=3D EMC_CLKCHAN= GE_PD_ENABLE; e34212c75a6899 Dmitry Osipenko 2019-08-12 1139 emc_cfg &=3D ~EMC_CLKCHA= NGE_SR_ENABLE; e34212c75a6899 Dmitry Osipenko 2019-08-12 1140 break; e34212c75a6899 Dmitry Osipenko 2019-08-12 1141 = e34212c75a6899 Dmitry Osipenko 2019-08-12 1142 default: e34212c75a6899 Dmitry Osipenko 2019-08-12 1143 emc_cfg &=3D ~EMC_CLKCHA= NGE_SR_ENABLE; e34212c75a6899 Dmitry Osipenko 2019-08-12 1144 emc_cfg &=3D ~EMC_CLKCHA= NGE_PD_ENABLE; e34212c75a6899 Dmitry Osipenko 2019-08-12 1145 break; e34212c75a6899 Dmitry Osipenko 2019-08-12 1146 } e34212c75a6899 Dmitry Osipenko 2019-08-12 1147 = e34212c75a6899 Dmitry Osipenko 2019-08-12 1148 writel_relaxed(emc_cfg, e= mc->regs + EMC_CFG_2); e34212c75a6899 Dmitry Osipenko 2019-08-12 1149 = e34212c75a6899 Dmitry Osipenko 2019-08-12 1150 /* initialize interrupt */ e34212c75a6899 Dmitry Osipenko 2019-08-12 1151 writel_relaxed(intmask, e= mc->regs + EMC_INTMASK); e34212c75a6899 Dmitry Osipenko 2019-08-12 1152 writel_relaxed(0xffffffff= , emc->regs + EMC_INTSTATUS); e34212c75a6899 Dmitry Osipenko 2019-08-12 1153 = e34212c75a6899 Dmitry Osipenko 2019-08-12 1154 /* ensure that unwanted d= ebug features are disabled */ e34212c75a6899 Dmitry Osipenko 2019-08-12 1155 emc_dbg =3D readl_relaxed= (emc->regs + EMC_DBG); e34212c75a6899 Dmitry Osipenko 2019-08-12 1156 emc_dbg |=3D EMC_DBG_CFG_= PRIORITY; e34212c75a6899 Dmitry Osipenko 2019-08-12 1157 emc_dbg &=3D ~EMC_DBG_REA= D_MUX_ASSEMBLY; e34212c75a6899 Dmitry Osipenko 2019-08-12 1158 emc_dbg &=3D ~EMC_DBG_WRI= TE_MUX_ACTIVE; e34212c75a6899 Dmitry Osipenko 2019-08-12 1159 emc_dbg &=3D ~EMC_DBG_FOR= CE_UPDATE; e34212c75a6899 Dmitry Osipenko 2019-08-12 1160 writel_relaxed(emc_dbg, e= mc->regs + EMC_DBG); e34212c75a6899 Dmitry Osipenko 2019-08-12 1161 = e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1162 switch (dram_type) { e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1163 case DRAM_TYPE_DDR1: e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 @1164 dram_type_str =3D "DDR1"; e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1165 break; e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1166 case DRAM_TYPE_LPDDR2: e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1167 dram_type_str =3D "LPDDR= 2"; e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1168 break; e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1169 case DRAM_TYPE_DDR2: e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1170 dram_type_str =3D "DDR2"; e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1171 break; e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1172 case DRAM_TYPE_DDR3: e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1173 dram_type_str =3D "DDR3"; e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1174 break; e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1175 } e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1176 = e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1177 emc_adr_cfg =3D readl_rel= axed(emc->regs + EMC_ADR_CFG); e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1178 emem_numdev =3D FIELD_GET= (EMC_ADR_CFG_EMEM_NUMDEV, emc_adr_cfg) + 1; e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1179 = e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1180 dev_info_once(emc->dev, "= %u %s %s attached\n", emem_numdev, e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1181 dram_type_str, eme= m_numdev =3D=3D 2 ? "devices" : "device"); e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1182 = e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1183 if (dram_type =3D=3D DRAM= _TYPE_LPDDR2 && !print_sdram_info_once) { e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1184 while (emem_numdev--) e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1185 emc_read_lpddr_sdram_in= fo(emc, emem_numdev); e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1186 = e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1187 print_sdram_info_once = =3D true; e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1188 } e3aabb3c7dbe66 Dmitry Osipenko 2021-12-22 1189 = e34212c75a6899 Dmitry Osipenko 2019-08-12 1190 return 0; e34212c75a6899 Dmitry Osipenko 2019-08-12 1191 } e34212c75a6899 Dmitry Osipenko 2019-08-12 1192 = --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org --===============6943738553393943721==--