Hi Kang, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on next-20230225] [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/Kang-Chen/hwspinlock-add-a-check-of-devm_regmap_field_alloc-in-qcom_hwspinlock_probe/20230226-224824 patch link: https://lore.kernel.org/r/20230226144545.4187442-1-void0red%40gmail.com patch subject: [PATCH] hwspinlock: add a check of devm_regmap_field_alloc in qcom_hwspinlock_probe config: hexagon-randconfig-r041-20230226 (https://download.01.org/0day-ci/archive/20230227/202302270034.DqtDwv49-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db89896bbbd2251fff457699635acbbedeead27f) 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 # https://github.com/intel-lab-lkp/linux/commit/b5a6ded03f6367c5e698c758864f3e569f1f762c git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Kang-Chen/hwspinlock-add-a-check-of-devm_regmap_field_alloc-in-qcom_hwspinlock_probe/20230226-224824 git checkout b5a6ded03f6367c5e698c758864f3e569f1f762c # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/hwspinlock/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202302270034.DqtDwv49-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from drivers/hwspinlock/qcom_hwspinlock.c:8: In file included from include/linux/io.h:13: In file included from arch/hexagon/include/asm/io.h:334: include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __raw_readb(PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) ^ In file included from drivers/hwspinlock/qcom_hwspinlock.c:8: In file included from include/linux/io.h:13: In file included from arch/hexagon/include/asm/io.h:334: include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) ^ In file included from drivers/hwspinlock/qcom_hwspinlock.c:8: In file included from include/linux/io.h:13: In file included from arch/hexagon/include/asm/io.h:334: include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ >> drivers/hwspinlock/qcom_hwspinlock.c:201:4: error: expected ')' return -ENOMEM; ^ drivers/hwspinlock/qcom_hwspinlock.c:200:6: note: to match this '(' if (IS_ERR(bank->lock[i].priv) ^ 6 warnings and 1 error generated. vim +201 drivers/hwspinlock/qcom_hwspinlock.c 168 169 static int qcom_hwspinlock_probe(struct platform_device *pdev) 170 { 171 struct hwspinlock_device *bank; 172 struct reg_field field; 173 struct regmap *regmap; 174 size_t array_size; 175 u32 stride; 176 u32 base; 177 int i; 178 179 regmap = qcom_hwspinlock_probe_syscon(pdev, &base, &stride); 180 if (IS_ERR(regmap) && PTR_ERR(regmap) == -ENODEV) 181 regmap = qcom_hwspinlock_probe_mmio(pdev, &base, &stride); 182 183 if (IS_ERR(regmap)) 184 return PTR_ERR(regmap); 185 186 array_size = QCOM_MUTEX_NUM_LOCKS * sizeof(struct hwspinlock); 187 bank = devm_kzalloc(&pdev->dev, sizeof(*bank) + array_size, GFP_KERNEL); 188 if (!bank) 189 return -ENOMEM; 190 191 platform_set_drvdata(pdev, bank); 192 193 for (i = 0; i < QCOM_MUTEX_NUM_LOCKS; i++) { 194 field.reg = base + i * stride; 195 field.lsb = 0; 196 field.msb = 31; 197 198 bank->lock[i].priv = devm_regmap_field_alloc(&pdev->dev, 199 regmap, field); 200 if (IS_ERR(bank->lock[i].priv) > 201 return -ENOMEM; 202 } 203 204 return devm_hwspin_lock_register(&pdev->dev, bank, &qcom_hwspinlock_ops, 205 0, QCOM_MUTEX_NUM_LOCKS); 206 } 207 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
