Hi Takashi,

I love your patch! Perhaps something to improve:

[auto build test WARNING on input/next]
[also build test WARNING on hid/for-next linux/master linus/master v5.13-rc3 next-20210527]
[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/Takashi-Iwai/Input-elants_i2c-Fix-NULL-dereference-at-probing/20210528-013428
base:   https://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git next
config: powerpc64-randconfig-r032-20210527 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 6505c630407c5feec818f0bb1c284f9eeebf2071)
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
        # install powerpc64 cross compiling tool for clang build
        # apt-get install binutils-powerpc64-linux-gnu
        # https://github.com/0day-ci/linux/commit/8a6af622a33ab5301cea789e5ff6a9afd9b09828
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Takashi-Iwai/Input-elants_i2c-Fix-NULL-dereference-at-probing/20210528-013428
        git checkout 8a6af622a33ab5301cea789e5ff6a9afd9b09828
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 

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

All warnings (new ones prefixed by >>):

>> drivers/input/touchscreen/elants_i2c.c:1639:43: warning: expression which evaluates to zero treated as a null pointer constant of type 'const void *' [-Wnon-literal-null-conversion]
           { .compatible = "elan,ekth3500", .data = EKTH3500 },
                                                    ^~~~~~~~
>> drivers/input/touchscreen/elants_i2c.c:1640:43: warning: incompatible integer to pointer conversion initializing 'const void *' with an expression of type 'int' [-Wint-conversion]
           { .compatible = "elan,ektf3624", .data = EKTF3624 },
                                                    ^~~~~~~~
   2 warnings generated.


vim +1639 drivers/input/touchscreen/elants_i2c.c

  1636	
  1637	#ifdef CONFIG_OF
  1638	static const struct of_device_id elants_of_match[] = {
> 1639		{ .compatible = "elan,ekth3500", .data = EKTH3500 },
> 1640		{ .compatible = "elan,ektf3624", .data = EKTF3624 },
  1641		{ /* sentinel */ }
  1642	};
  1643	MODULE_DEVICE_TABLE(of, elants_of_match);
  1644	#endif
  1645	

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