Hi Anshul, kernel test robot noticed the following build warnings: [auto build test WARNING on jic23-iio/togreg] [also build test WARNING on linus/master v6.7-rc2 next-20231124] [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/Anshul-Dalal/dt-bindings-iio-chemical-add-aosong-ags02ma/20231121-180435 base: https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg patch link: https://lore.kernel.org/r/20231121095800.2180870-3-anshulusr%40gmail.com patch subject: [PATCH v3 3/3] iio: chemical: add support for Aosong AGS02MA config: arm-randconfig-r081-20231123 (https://download.01.org/0day-ci/archive/20231125/202311251636.m0yt3fIb-lkp@xxxxxxxxx/config) compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0 reproduce: (https://download.01.org/0day-ci/archive/20231125/202311251636.m0yt3fIb-lkp@xxxxxxxxx/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 <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202311251636.m0yt3fIb-lkp@xxxxxxxxx/ New smatch warnings: drivers/iio/chemical/ags02ma.c:53 ags02ma_register_read() warn: unsigned 'ret' is never less than zero. Old smatch warnings: drivers/iio/chemical/ags02ma.c:63 ags02ma_register_read() warn: unsigned 'ret' is never less than zero. vim +/ret +53 drivers/iio/chemical/ags02ma.c 45 46 static u32 ags02ma_register_read(struct i2c_client *client, u8 reg, u16 delay) 47 { 48 u32 ret; 49 u8 crc; 50 struct ags02ma_reading read_buffer; 51 52 ret = i2c_master_send(client, ®, sizeof(reg)); > 53 if (ret < 0) { 54 dev_err(&client->dev, 55 "Failed to send data to register 0x%x: %d", reg, ret); 56 return ret; 57 } 58 59 /* Processing Delay, Check Table 7.7 in the datasheet */ 60 msleep_interruptible(delay); 61 62 ret = i2c_master_recv(client, (u8 *)&read_buffer, sizeof(read_buffer)); 63 if (ret < 0) { 64 dev_err(&client->dev, 65 "Failed to receive from register 0x%x: %d", reg, ret); 66 return ret; 67 } 68 ret = be32_to_cpu(read_buffer.data); 69 70 crc = crc8(ags02ma_crc8_table, (u8 *)&read_buffer.data, 71 sizeof(read_buffer.data), AGS02MA_CRC8_INIT); 72 if (crc != read_buffer.crc) { 73 dev_err(&client->dev, "CRC error\n"); 74 return -EIO; 75 } 76 77 return ret; 78 } 79 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
