Re: [PATCH 2/3] iio: accel: kionix-kx022a: Add chip_info structure

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

Hi Mehdi,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on jic23-iio/togreg]
[also build test ERROR on next-20230317]
[cannot apply to linus/master v6.3-rc2]
[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/Mehdi-Djait/dt-bindings-iio-Add-KX132-accelerometer/20230317-075056
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
patch link:    https://lore.kernel.org/r/3ddca10a4c03c3a64afb831cc9dd1e01fe89d305.1679009443.git.mehdi.djait.k%40gmail.com
patch subject: [PATCH 2/3] iio: accel: kionix-kx022a: Add chip_info structure
config: i386-randconfig-a011-20230313 (https://download.01.org/0day-ci/archive/20230317/202303171208.uYJzdkrv-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
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/intel-lab-lkp/linux/commit/40c75341c42d0e5bea5d73961202978a4be41cd2
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Mehdi-Djait/dt-bindings-iio-Add-KX132-accelerometer/20230317-075056
        git checkout 40c75341c42d0e5bea5d73961202978a4be41cd2
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/iio/accel/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303171208.uYJzdkrv-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

>> drivers/iio/accel/kionix-kx022a-i2c.c:27:12: error: assigning to 'struct kx022a_chip_info *' from 'const void *' discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
           chip_info = device_get_match_data(&i2c->dev);
                     ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/iio/accel/kionix-kx022a-i2c.c:29:13: error: assigning to 'struct kx022a_chip_info *' from 'const struct kx022a_chip_info *' discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
                   chip_info = (const struct kx022a_chip_info *) id->driver_data;
                             ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   2 errors generated.
--
>> drivers/iio/accel/kionix-kx022a.c:598:16: warning: variable length array used [-Wvla]
           __le16 buffer[data->chip_info->fifo_length * 3];
                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 warning generated.
--
>> drivers/iio/accel/kionix-kx022a-spi.c:27:12: error: assigning to 'struct kx022a_chip_info *' from 'const void *' discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
           chip_info = device_get_match_data(&spi->dev);
                     ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/iio/accel/kionix-kx022a-spi.c:29:13: error: assigning to 'struct kx022a_chip_info *' from 'const struct kx022a_chip_info *' discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
                   chip_info = (const struct kx022a_chip_info *) id->driver_data;
                             ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   2 errors generated.


vim +27 drivers/iio/accel/kionix-kx022a-i2c.c

    14	
    15	static int kx022a_i2c_probe(struct i2c_client *i2c)
    16	{
    17		struct device *dev = &i2c->dev;
    18		struct kx022a_chip_info *chip_info;
    19		struct regmap *regmap;
    20		const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
    21	
    22		if (!i2c->irq) {
    23			dev_err(dev, "No IRQ configured\n");
    24			return -EINVAL;
    25		}
    26	
  > 27		chip_info = device_get_match_data(&i2c->dev);
    28		if (!chip_info)
  > 29			chip_info = (const struct kx022a_chip_info *) id->driver_data;
    30	
    31		regmap = devm_regmap_init_i2c(i2c, chip_info->regmap_config);
    32		if (IS_ERR(regmap))
    33			return dev_err_probe(dev, PTR_ERR(regmap),
    34					     "Failed to initialize Regmap\n");
    35	
    36		return kx022a_probe_internal(dev, chip_info);
    37	}
    38	

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https://github.com/intel/lkp-tests