Re: [PATCH v2] HID: pulsar: add driver for Pulsar gaming mice

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

Hi Nikolas,

kernel test robot noticed the following build warnings:

[auto build test WARNING on v7.0-rc7]
[cannot apply to hid/for-next linus/master next-20260410]
[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/Nikolas-Koesling/HID-pulsar-add-driver-for-Pulsar-gaming-mice/20260411-084544
base:   v7.0-rc7
patch link:    https://lore.kernel.org/r/20260401185708.286359-1-nikolas%40koesling.info
patch subject: [PATCH v2] HID: pulsar: add driver for Pulsar gaming mice
config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20260412/202604121253.ZYbxnPmo-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260412/202604121253.ZYbxnPmo-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/202604121253.ZYbxnPmo-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/hid/hid-pulsar.c: In function 'pulsar_init_work':
>> drivers/hid/hid-pulsar.c:601:27: warning: '%s' directive output may be truncated writing up to 127 bytes into a region of size 32 [-Wformat-truncation=]
     601 |                          "%s", hdev->name);
         |                           ^~
   drivers/hid/hid-pulsar.c:600:17: note: 'snprintf' output between 1 and 128 bytes into a destination of size 32
     600 |                 snprintf(drvdata->battery.model, sizeof(drvdata->battery.model),
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     601 |                          "%s", hdev->name);
         |                          ~~~~~~~~~~~~~~~~~
   drivers/hid/hid-pulsar.c:586:59: warning: '%s' directive output may be truncated writing up to 127 bytes into a region of size 32 [-Wformat-truncation=]
     586 |                          sizeof(drvdata->battery.model), "%s", hdev->name);
         |                                                           ^~
   drivers/hid/hid-pulsar.c:585:17: note: 'snprintf' output between 1 and 128 bytes into a destination of size 32
     585 |                 snprintf(drvdata->battery.model,
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     586 |                          sizeof(drvdata->battery.model), "%s", hdev->name);
         |                          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +601 drivers/hid/hid-pulsar.c

   553	
   554	static void pulsar_init_work(struct work_struct *work)
   555	{
   556		struct pulsar_data *drvdata;
   557		struct hid_device *hdev;
   558		struct power_supply_config psy_cfg;
   559		int ret;
   560		u8 data[DEV_INFO_LEN];
   561	
   562		drvdata = container_of(work, struct pulsar_data, init_work.work);
   563		hdev = drvdata->hdev;
   564	
   565		ret = read_device_info(drvdata, data);
   566		if (ret == -ETIMEDOUT) {
   567			if (drvdata->init_retries--) {
   568				hid_dbg(hdev,
   569					"device info read timed out, retrying (%u left)\n",
   570					drvdata->init_retries);
   571				schedule_delayed_work(&drvdata->init_work,
   572						      msecs_to_jiffies
   573						      (INIT_DELAY_MSEC));
   574				return;
   575			}
   576			hid_err(hdev, "device info read timed out, giving up\n");
   577			return;
   578		}
   579		if (ret < 0) {
   580			if (drvdata->type == TYPE_PULSAR) {
   581				hid_err(hdev, "failed to read device info: %d\n", ret);
   582				return;
   583			}
   584			hid_dbg(hdev, "failed to read device info: %d\n", ret);
   585			snprintf(drvdata->battery.model,
   586				 sizeof(drvdata->battery.model), "%s", hdev->name);
   587			goto register_battery;
   588		}
   589	
   590		hid_dbg(hdev, "device info: %*ph (%d)\n", DEV_INFO_LEN, data, ret);
   591	
   592		switch (drvdata->type) {
   593		case TYPE_PULSAR:
   594			model_pulsar(data, drvdata);
   595			break;
   596		case TYPE_ATK:
   597			model_atk(data, drvdata);
   598			break;
   599		default:
   600			snprintf(drvdata->battery.model, sizeof(drvdata->battery.model),
 > 601				 "%s", hdev->name);
   602		}
   603	
   604	register_battery:
   605		init_power_supply_desc(drvdata);
   606	
   607		psy_cfg = (struct power_supply_config) {.drv_data = drvdata };
   608		drvdata->battery.ps =
   609		    devm_power_supply_register(&hdev->dev, &drvdata->battery.desc,
   610					       &psy_cfg);
   611		if (IS_ERR(drvdata->battery.ps)) {
   612			hid_err(hdev, "failed to register battery: %ld\n",
   613				PTR_ERR(drvdata->battery.ps));
   614			drvdata->battery.ps = NULL;
   615			return;
   616		}
   617	
   618		atomic_set(&drvdata->device_verified, 1);
   619		hid_info(hdev, "device verified, battery registered\n");
   620	}
   621	

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