[PATCH v2 3/7] drivers: hwmon: Add the iEi WT61P803 PUZZLE HWMON driver

[kernel test robot]

Hi Luka,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on hwmon/hwmon-next]
[also build test WARNING on lee-mfd/for-mfd-next pavel-linux-leds/for-next linus/master v5.9-rc6 next-20200925]
[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]

url:    https://github.com/0day-ci/linux/commits/Luka-Kovacic/Add-support-for-the-iEi-Puzzle-M801-board/20200926-215756
base:   https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next
config: nios2-allyesconfig (attached as .config)
compiler: nios2-linux-gcc (GCC) 9.3.0
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/0day-ci/linux/commit/a453994a7710920ee06d179274597737ff37af27
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Luka-Kovacic/Add-support-for-the-iEi-Puzzle-M801-board/20200926-215756
        git checkout a453994a7710920ee06d179274597737ff37af27
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=nios2 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp at intel.com>

All warnings (new ones prefixed by >>):

   drivers/hwmon/iei-wt61p803-puzzle-hwmon.c: In function 'iei_wt61p803_puzzle_hwmon_probe':
>> drivers/hwmon/iei-wt61p803-puzzle-hwmon.c:457:17: warning: variable 'hwmon_dev' set but not used [-Wunused-but-set-variable]
     457 |  struct device *hwmon_dev;
         |                 ^~~~~~~~~

vim +/hwmon_dev +457 drivers/hwmon/iei-wt61p803-puzzle-hwmon.c

   450	
   451	static int iei_wt61p803_puzzle_hwmon_probe(struct platform_device *pdev)
   452	{
   453		struct device *dev = &pdev->dev;
   454		struct fwnode_handle *child;
   455		struct iei_wt61p803_puzzle_hwmon *mcu_hwmon;
   456		struct iei_wt61p803_puzzle *mcu = dev_get_drvdata(dev->parent);
 > 457		struct device *hwmon_dev;
   458		int ret;
   459	
   460		mcu_hwmon = devm_kzalloc(dev, sizeof(*mcu_hwmon), GFP_KERNEL);
   461		if (!mcu_hwmon)
   462			return -ENOMEM;
   463	
   464		mcu_hwmon->response_buffer = devm_kzalloc(dev,
   465				IEI_WT61P803_PUZZLE_BUF_SIZE, GFP_KERNEL);
   466		if (!mcu_hwmon->response_buffer)
   467			return -ENOMEM;
   468	
   469		mcu_hwmon->mcu = mcu;
   470		mutex_init(&mcu_hwmon->lock);
   471		platform_set_drvdata(pdev, mcu_hwmon);
   472	
   473		hwmon_dev = devm_hwmon_device_register_with_info(dev,
   474						"iei_wt61p803_puzzle",
   475						mcu_hwmon,
   476						&iei_wt61p803_puzzle_chip_info,
   477						NULL);
   478	
   479		/* Control fans via PWM lines via Linux Kernel */
   480		if (IS_ENABLED(CONFIG_THERMAL)) {
   481			device_for_each_child_node(dev, child) {
   482				ret = iei_wt61p803_puzzle_enable_thermal_cooling_dev(dev, child, mcu_hwmon);
   483				if (ret) {
   484					dev_err(dev, "Enabling the PWM fan failed\n");
   485					fwnode_handle_put(child);
   486					return ret;
   487				}
   488			}
   489		}
   490		return 0;
   491	}
   492	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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