Hi Qing,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on spi/for-next]
[also build test ERROR on robh/for-next linus/master v5.10-rc7 next-20201208]
[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/Qing-Zhang/spi-LS7A-Add-Loongson-LS7A-SPI-controller-driver-support/20201208-154822
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
config: c6x-allyesconfig (attached as .config)
compiler: c6x-elf-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/6b2c3d42e1460dd3472a2c74d6a6c46d8693ce79
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Qing-Zhang/spi-LS7A-Add-Loongson-LS7A-SPI-controller-driver-support/20201208-154822
        git checkout 6b2c3d42e1460dd3472a2c74d6a6c46d8693ce79
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=c6x 

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

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

   drivers/spi/spi-ls7a.c: In function 'ls7a_spi_write_read':
   drivers/spi/spi-ls7a.c:162:19: warning: variable 'ls7a_spi' set but not used [-Wunused-but-set-variable]
     162 |  struct ls7a_spi *ls7a_spi;
         |                   ^~~~~~~~
   drivers/spi/spi-ls7a.c: At top level:
>> drivers/spi/spi-ls7a.c:320:1: warning: data definition has no type or storage class
     320 | module_pci_driver(ls7a_spi_pci_driver);
         | ^~~~~~~~~~~~~~~~~
>> drivers/spi/spi-ls7a.c:320:1: error: type defaults to 'int' in declaration of 'module_pci_driver' [-Werror=implicit-int]
>> drivers/spi/spi-ls7a.c:320:1: warning: parameter names (without types) in function declaration
   drivers/spi/spi-ls7a.c:313:26: warning: 'ls7a_spi_pci_driver' defined but not used [-Wunused-variable]
     313 | static struct pci_driver ls7a_spi_pci_driver = {
         |                          ^~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +320 drivers/spi/spi-ls7a.c

   319	
 > 320	module_pci_driver(ls7a_spi_pci_driver);
   321	

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