Re: [PATCH v7 2/2] hwmon: (isl28022) new driver for ISL28022 power monitor

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

Hi Yikai,

kernel test robot noticed the following build warnings:

[auto build test WARNING on groeck-staging/hwmon-next]
[also build test WARNING on linus/master v6.11 next-20240926]
[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/Yikai-Tsai/dt-bindings-hwmon-add-renesas-isl28022/20240925-111332
base:   https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next
patch link:    https://lore.kernel.org/r/20240925031131.14645-3-yikai.tsai.wiwynn%40gmail.com
patch subject: [PATCH v7 2/2] hwmon: (isl28022) new driver for ISL28022 power monitor
config: i386-randconfig-r133-20240927 (https://download.01.org/0day-ci/archive/20240927/202409271235.PtMXq9Kx-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240927/202409271235.PtMXq9Kx-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/202409271235.PtMXq9Kx-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/hwmon/isl28022.c:396:36: sparse: sparse: incorrect type in argument 2 (different base types) @@     expected int err @@     got char * @@
   drivers/hwmon/isl28022.c:396:36: sparse:     expected int err
   drivers/hwmon/isl28022.c:396:36: sparse:     got char *
>> drivers/hwmon/isl28022.c:396:88: sparse: sparse: incorrect type in argument 3 (different base types) @@     expected char const *fmt @@     got unsigned int [addressable] [assigned] [usertype] val @@
   drivers/hwmon/isl28022.c:396:88: sparse:     expected char const *fmt
   drivers/hwmon/isl28022.c:396:88: sparse:     got unsigned int [addressable] [assigned] [usertype] val
   drivers/hwmon/isl28022.c:406:36: sparse: sparse: incorrect type in argument 2 (different base types) @@     expected int err @@     got char * @@
   drivers/hwmon/isl28022.c:406:36: sparse:     expected int err
   drivers/hwmon/isl28022.c:406:36: sparse:     got char *
   drivers/hwmon/isl28022.c:406:82: sparse: sparse: incorrect type in argument 3 (different base types) @@     expected char const *fmt @@     got unsigned int [addressable] [assigned] [usertype] val @@
   drivers/hwmon/isl28022.c:406:82: sparse:     expected char const *fmt
   drivers/hwmon/isl28022.c:406:82: sparse:     got unsigned int [addressable] [assigned] [usertype] val
   drivers/hwmon/isl28022.c:414:28: sparse: sparse: incorrect type in argument 2 (different base types) @@     expected int err @@     got char * @@
   drivers/hwmon/isl28022.c:414:28: sparse:     expected int err
   drivers/hwmon/isl28022.c:414:28: sparse:     got char *
>> drivers/hwmon/isl28022.c:414:87: sparse: sparse: incorrect type in argument 3 (different base types) @@     expected char const *fmt @@     got unsigned int [usertype] shunt @@
   drivers/hwmon/isl28022.c:414:87: sparse:     expected char const *fmt
   drivers/hwmon/isl28022.c:414:87: sparse:     got unsigned int [usertype] shunt
   drivers/hwmon/isl28022.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/xarray.h, ...):
   include/linux/page-flags.h:235:46: sparse: sparse: self-comparison always evaluates to false
   include/linux/page-flags.h:235:46: sparse: sparse: self-comparison always evaluates to false

vim +396 drivers/hwmon/isl28022.c

   346	
   347	/*
   348	 * read property values and make consistency checks.
   349	 *
   350	 * following values for shunt range and resistor are allowed:
   351	 *   40 mV -> gain 1, shunt min.  800 micro ohms
   352	 *   80 mV -> gain 2, shunt min. 1600 micro ohms
   353	 *  160 mV -> gain 4, shunt min. 3200 micro ohms
   354	 *  320 mV -> gain 8, shunt min. 6400 micro ohms
   355	 */
   356	static int isl28022_read_properties(struct device *dev, struct isl28022_data *data)
   357	{
   358		u32 val;
   359		int err;
   360	
   361		err = device_property_read_u32(dev, "shunt-resistor-micro-ohms", &val);
   362		if (err == -EINVAL)
   363			val = 10000;
   364		else if (err < 0)
   365			return err;
   366		data->shunt = val;
   367	
   368		err = device_property_read_u32(dev, "renesas,shunt-range-microvolt", &val);
   369		if (err == -EINVAL)
   370			val = 320000;
   371		else if (err < 0)
   372			return err;
   373	
   374		switch (val) {
   375		case 40000:
   376			data->gain = 1;
   377			if (data->shunt < 800)
   378				goto shunt_invalid;
   379			break;
   380		case 80000:
   381			data->gain = 2;
   382			if (data->shunt < 1600)
   383				goto shunt_invalid;
   384			break;
   385		case 160000:
   386			data->gain = 4;
   387			if (data->shunt < 3200)
   388				goto shunt_invalid;
   389			break;
   390		case 320000:
   391			data->gain = 8;
   392			if (data->shunt < 6400)
   393				goto shunt_invalid;
   394			break;
   395		default:
 > 396			dev_err_probe(dev, "renesas,shunt-range-microvolt invalid value %d\n", val);
   397			return -EINVAL;
   398		}
   399	
   400		err = device_property_read_u32(dev, "renesas,average-samples", &val);
   401		if (err == -EINVAL)
   402			val = 1;
   403		else if (err < 0)
   404			return err;
   405		if (val > 128 || hweight32(val) != 1) {
 > 406			dev_err_probe(dev, "renesas,average-samples invalid value %d\n", val);
   407			return -EINVAL;
   408		}
   409		data->average = val;
   410	
   411		return 0;
   412	
   413	shunt_invalid:
 > 414		dev_err_probe(dev, "renesas,shunt-resistor-microvolt invalid value %d\n", data->shunt);
   415		return -EINVAL;
   416	}
   417	

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