Re: [PATCH 2/2] hwmon: (ina780) Add driver for TI INA780

[kernel test robot <lkp@intel.com>]

Hi Chris,

kernel test robot noticed the following build warnings:

[auto build test WARNING on groeck-staging/hwmon-next]
[also build test WARNING on linus/master v6.16 next-20250806]
[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/Chris-Packham/hwmon-ina780-Add-driver-for-TI-INA780/20250806-115131
base:   https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next
patch link:    https://lore.kernel.org/r/20250806005127.542298-2-chris.packham%40alliedtelesis.co.nz
patch subject: [PATCH 2/2] hwmon: (ina780) Add driver for TI INA780
config: x86_64-randconfig-072-20250807 (https://download.01.org/0day-ci/archive/20250807/202508070319.QMV6021c-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14+deb12u1) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250807/202508070319.QMV6021c-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202508070319.QMV6021c-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/hwmon/ina780.c: In function 'ina780_read_temp':
>> drivers/hwmon/ina780.c:293:18: warning: variable 'mask' set but not used [-Wunused-but-set-variable]
     293 |         int reg, mask;
         |                  ^~~~


vim +/mask +293 drivers/hwmon/ina780.c

   289	
   290	static int ina780_read_temp(struct device *dev, u32 attr, long *val)
   291	{
   292		struct ina780_data *data = dev_get_drvdata(dev);
 > 293		int reg, mask;
   294		int regval;
   295		int err;
   296	
   297		switch (attr) {
   298		case hwmon_temp_input:
   299			reg = INA780_DIETEMP;
   300			break;
   301		case hwmon_temp_max:
   302			reg = INA780_TEMP_LIMIT;
   303			break;
   304		case hwmon_temp_max_alarm:
   305			reg = INA780_DIAG_ALRT;
   306			mask = INA780_DIAG_ALRT_TMPOL;
   307			break;
   308		default:
   309			return -EOPNOTSUPP;
   310		}
   311	
   312		switch (attr) {
   313		case hwmon_temp_input:
   314		case hwmon_temp_max:
   315			err = regmap_read(data->regmap, reg, &regval);
   316			if (err)
   317				return err;
   318			*val = div_s64(((s64)((s16)regval) >> 4) * INA780_TEMP_LSB, 1000);
   319			break;
   320		case hwmon_temp_max_alarm:
   321			err = regmap_read(data->regmap, INA780_DIAG_ALRT, &regval);
   322			*val = !!(regval & INA780_DIAG_ALRT_TMPOL);
   323			break;
   324		}
   325	
   326		return 0;
   327	}
   328	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki