tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: a2824f19e6065a0d3735acd9fe7155b104e7edf5 commit: 28564486866fa889b78264360022c94836fa8072 ASoC: fsl_xcvr: Add XCVR ASoC CPU DAI driver date: 10 months ago config: arm-randconfig-c002-20210816 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 44d0a99a12ec7ead4d2f5ef649ba05b40f6d463d) 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 # install arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 28564486866fa889b78264360022c94836fa8072 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm clang-analyzer If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; clang-analyzer warnings: (new ones prefixed by >>) drivers/media/i2c/st-mipid02.c:747:21: warning: Value stored to 'client' during its initialization is never read [clang-analyzer-deadcode.DeadStores] struct i2c_client *client = bridge->i2c_client; ^~~~~~ ~~~~~~~~~~~~~~~~~~ drivers/media/i2c/st-mipid02.c:747:21: note: Value stored to 'client' during its initialization is never read struct i2c_client *client = bridge->i2c_client; ^~~~~~ ~~~~~~~~~~~~~~~~~~ drivers/media/i2c/st-mipid02.c:919:3: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores] ret = -EINVAL; ^ ~~~~~~~ drivers/media/i2c/st-mipid02.c:919:3: note: Value stored to 'ret' is never read ret = -EINVAL; ^ ~~~~~~~ Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. drivers/media/tuners/tuner-xc2028.c:1037:3: warning: Value stored to 'rc' is never read [clang-analyzer-deadcode.DeadStores] rc = send_seq(priv, {0x00, 0x00}); ^ drivers/media/tuners/tuner-xc2028.c:1037:3: note: Value stored to 'rc' is never read Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 6 warnings generated. Suppressed 6 warnings (6 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 2 warnings generated. Suppressed 2 warnings (2 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. sound/soc/soc-pcm.c:1955:2: warning: Value stored to 'err' is never read [clang-analyzer-deadcode.DeadStores] err = dpcm_be_dai_hw_free(fe, stream); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ sound/soc/soc-pcm.c:1955:2: note: Value stored to 'err' is never read err = dpcm_be_dai_hw_free(fe, stream); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Suppressed 2 warnings (2 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 5 warnings generated. sound/soc/soc-ops.c:370:26: warning: The result of the left shift is undefined because the right operand is negative [clang-analyzer-core.UndefinedBinaryOperatorResult] unsigned int mask = (1U << (fls(min + max) - 1)) - 1; ^ ~~~~~~~~~~~~~~~~~~~~ sound/soc/soc-ops.c:370:26: note: The result of the left shift is undefined because the right operand is negative unsigned int mask = (1U << (fls(min + max) - 1)) - 1; ^ ~~~~~~~~~~~~~~~~~~~~ sound/soc/soc-ops.c:408:26: warning: The result of the left shift is undefined because the right operand is negative [clang-analyzer-core.UndefinedBinaryOperatorResult] unsigned int mask = (1U << (fls(min + max) - 1)) - 1; ^ ~~~~~~~~~~~~~~~~~~~~ sound/soc/soc-ops.c:408:26: note: The result of the left shift is undefined because the right operand is negative unsigned int mask = (1U << (fls(min + max) - 1)) - 1; ^ ~~~~~~~~~~~~~~~~~~~~ Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 2 warnings generated. Suppressed 2 warnings (2 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 2 warnings generated. Suppressed 2 warnings (2 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 5 warnings generated. drivers/mmc/core/core.c:2010:19: warning: Value stored to 'host' during its initialization is never read [clang-analyzer-deadcode.DeadStores] struct mmc_host *host = card->host; ^~~~ ~~~~~~~~~~ drivers/mmc/core/core.c:2010:19: note: Value stored to 'host' during its initialization is never read struct mmc_host *host = card->host; ^~~~ ~~~~~~~~~~ Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 2 warnings generated. Suppressed 2 warnings (2 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 2 warnings generated. Suppressed 2 warnings (2 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. struct device *dev = &xcvr->pdev->dev; ^~~ ~~~~~~~~~~~~~~~~ sound/soc/fsl/fsl_xcvr.c:1048:17: note: Value stored to 'dev' during its initialization is never read struct device *dev = &xcvr->pdev->dev; ^~~ ~~~~~~~~~~~~~~~~ Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 2 warnings generated. Suppressed 2 warnings (2 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 2 warnings generated. Suppressed 2 warnings (2 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 2 warnings generated. Suppressed 2 warnings (2 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. vim +/dev +1048 sound/soc/fsl/fsl_xcvr.c 1044 1045 static irqreturn_t irq0_isr(int irq, void *devid) 1046 { 1047 struct fsl_xcvr *xcvr = (struct fsl_xcvr *)devid; 1049 struct regmap *regmap = xcvr->regmap; 1050 void __iomem *reg_ctrl, *reg_buff; 1051 u32 isr, isr_clr = 0, val, i; 1052 1053 regmap_read(regmap, FSL_XCVR_EXT_ISR, &isr); 1054 1055 if (isr & FSL_XCVR_IRQ_NEW_CS) { 1056 dev_dbg(dev, "Received new CS block\n"); 1057 isr_clr |= FSL_XCVR_IRQ_NEW_CS; 1058 /* Data RAM is 4KiB, last two pages: 8 and 9. Select page 8. */ 1059 regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL, 1060 FSL_XCVR_EXT_CTRL_PAGE_MASK, 1061 FSL_XCVR_EXT_CTRL_PAGE(8)); 1062 1063 /* Find updated CS buffer */ 1064 reg_ctrl = xcvr->ram_addr + FSL_XCVR_RX_CS_CTRL_0; 1065 reg_buff = xcvr->ram_addr + FSL_XCVR_RX_CS_BUFF_0; 1066 memcpy_fromio(&val, reg_ctrl, sizeof(val)); 1067 if (!val) { 1068 reg_ctrl = xcvr->ram_addr + FSL_XCVR_RX_CS_CTRL_1; 1069 reg_buff = xcvr->ram_addr + FSL_XCVR_RX_CS_BUFF_1; 1070 memcpy_fromio(&val, reg_ctrl, sizeof(val)); 1071 } 1072 1073 if (val) { 1074 /* copy CS buffer */ 1075 memcpy_fromio(&xcvr->rx_iec958.status, reg_buff, 1076 sizeof(xcvr->rx_iec958.status)); 1077 for (i = 0; i < 6; i++) { 1078 val = *(u32 *)(xcvr->rx_iec958.status + i*4); 1079 *(u32 *)(xcvr->rx_iec958.status + i*4) = 1080 bitrev32(val); 1081 } 1082 /* clear CS control register */ 1083 memset_io(reg_ctrl, 0, sizeof(val)); 1084 } 1085 } 1086 if (isr & FSL_XCVR_IRQ_NEW_UD) { 1087 dev_dbg(dev, "Received new UD block\n"); 1088 isr_clr |= FSL_XCVR_IRQ_NEW_UD; 1089 } 1090 if (isr & FSL_XCVR_IRQ_MUTE) { 1091 dev_dbg(dev, "HW mute bit detected\n"); 1092 isr_clr |= FSL_XCVR_IRQ_MUTE; 1093 } 1094 if (isr & FSL_XCVR_IRQ_FIFO_UOFL_ERR) { 1095 dev_dbg(dev, "RX/TX FIFO full/empty\n"); 1096 isr_clr |= FSL_XCVR_IRQ_FIFO_UOFL_ERR; 1097 } 1098 if (isr & FSL_XCVR_IRQ_ARC_MODE) { 1099 dev_dbg(dev, "CMDC SM falls out of eARC mode\n"); 1100 isr_clr |= FSL_XCVR_IRQ_ARC_MODE; 1101 } 1102 if (isr & FSL_XCVR_IRQ_DMA_RD_REQ) { 1103 dev_dbg(dev, "DMA read request\n"); 1104 isr_clr |= FSL_XCVR_IRQ_DMA_RD_REQ; 1105 } 1106 if (isr & FSL_XCVR_IRQ_DMA_WR_REQ) { 1107 dev_dbg(dev, "DMA write request\n"); 1108 isr_clr |= FSL_XCVR_IRQ_DMA_WR_REQ; 1109 } 1110 1111 if (isr_clr) { 1112 regmap_write(regmap, FSL_XCVR_EXT_ISR_CLR, isr_clr); 1113 return IRQ_HANDLED; 1114 } 1115 1116 return IRQ_NONE; 1117 } 1118 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org