linux-kernel - Re: [PATCH v4 3/7] platform/x86: lenovo-wmi-{capdata,other}: Support multiple Capability Data

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Message-ID: <202511142143.WLGlvDdQ-lkp@intel.com>
Date: Fri, 14 Nov 2025 21:50:29 +0800
From: kernel test robot <lkp@...el.com>
To: Rong Zhang <i@...g.moe>, Mark Pearson <mpearson-lenovo@...ebb.ca>,
	"Derek J. Clark" <derekjohn.clark@...il.com>,
	Armin Wolf <W_Armin@....de>, Hans de Goede <hansg@...nel.org>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	Rong Zhang <i@...g.moe>, Guenter Roeck <linux@...ck-us.net>,
	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-hwmon@...r.kernel.org
Subject: Re: [PATCH v4 3/7] platform/x86: lenovo-wmi-{capdata,other}: Support
 multiple Capability Data

Hi Rong,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 2ccec5944606ee1389abc7ee41986825c6ceb574]

url:    https://github.com/intel-lab-lkp/linux/commits/Rong-Zhang/platform-x86-lenovo-wmi-helpers-Convert-returned-buffer-into-u32/20251114-032343
base:   2ccec5944606ee1389abc7ee41986825c6ceb574
patch link:    https://lore.kernel.org/r/20251113191152.96076-4-i%40rong.moe
patch subject: [PATCH v4 3/7] platform/x86: lenovo-wmi-{capdata,other}: Support multiple Capability Data
config: x86_64-randconfig-011-20251114 (https://download.01.org/0day-ci/archive/20251114/202511142143.WLGlvDdQ-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251114/202511142143.WLGlvDdQ-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202511142143.WLGlvDdQ-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/platform/x86/lenovo/wmi-capdata.c:88:27: warning: cast to smaller integer type 'enum lwmi_cd_type' from 'void *' [-Wvoid-pointer-to-enum-cast]
      88 |         enum lwmi_cd_type type = (enum lwmi_cd_type)data;
         |                                  ^~~~~~~~~~~~~~~~~~~~~~~
   1 warning generated.


vim +88 drivers/platform/x86/lenovo/wmi-capdata.c

    78	
    79	/**
    80	 * lwmi_cd_match() - Match rule for the master driver.
    81	 * @dev: Pointer to the capability data parent device.
    82	 * @data: Type of the capability data (cast to enum lwmi_cd_type).
    83	 *
    84	 * Return: int.
    85	 */
    86	static int lwmi_cd_match(struct device *dev, void *data)
    87	{
  > 88		enum lwmi_cd_type type = (enum lwmi_cd_type)data;
    89		struct lwmi_cd_priv *priv;
    90	
    91		if (dev->driver != &lwmi_cd_driver.driver)
    92			return false;
    93	
    94		priv = dev_get_drvdata(dev);
    95		return priv->list->type == type;
    96	}
    97	

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