Re: [PATCH v3 2/2] spi: dw: Add dma controller capability checks

[kernel test robot]

Hi Joy,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on broonie-spi/for-next]
[also build test WARNING on linus/master v6.3-rc4 next-20230324]
[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/Joy-Chakraborty/spi-dw-Add-32-bpw-support-to-DW-DMA-Controller/20230327-013645
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
patch link:    https://lore.kernel.org/r/20230326173511.710749-3-joychakr%40google.com
patch subject: [PATCH v3 2/2] spi: dw: Add dma controller capability checks
config: arc-randconfig-s041-20230326 (https://download.01.org/0day-ci/archive/20230327/202303270715.w9sMJhIh-lkp@xxxxxxxxx/config)
compiler: arceb-elf-gcc (GCC) 12.1.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://github.com/intel-lab-lkp/linux/commit/9962c1acd23cb0766a09948c1bee4f29950b8a96
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Joy-Chakraborty/spi-dw-Add-32-bpw-support-to-DW-DMA-Controller/20230327-013645
        git checkout 9962c1acd23cb0766a09948c1bee4f29950b8a96
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arc SHELL=/bin/bash drivers/spi/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202303270715.w9sMJhIh-lkp@xxxxxxxxx/

sparse warnings: (new ones prefixed by >>)
>> drivers/spi/spi-dw-dma.c:241:56: sparse: sparse: marked inline, but without a definition

vim +241 drivers/spi/spi-dw-dma.c

f89a6d8f43ebe9 drivers/spi/spi-dw-mid.c Andy Shevchenko 2015-03-09  240  
57784411728ff4 drivers/spi/spi-dw-dma.c Serge Semin     2020-05-29 @241  static enum dma_slave_buswidth dw_spi_dma_convert_width(u8 n_bytes)
57784411728ff4 drivers/spi/spi-dw-dma.c Serge Semin     2020-05-29  242  {
80de96dae70648 drivers/spi/spi-dw-dma.c Joy Chakraborty 2023-03-26  243  	switch (n_bytes) {
80de96dae70648 drivers/spi/spi-dw-dma.c Joy Chakraborty 2023-03-26  244  	case 1:
e31abce778bc05 drivers/spi/spi-dw-mid.c Andy Shevchenko 2015-03-09  245  		return DMA_SLAVE_BUSWIDTH_1_BYTE;
80de96dae70648 drivers/spi/spi-dw-dma.c Joy Chakraborty 2023-03-26  246  	case 2:
e31abce778bc05 drivers/spi/spi-dw-mid.c Andy Shevchenko 2015-03-09  247  		return DMA_SLAVE_BUSWIDTH_2_BYTES;
80de96dae70648 drivers/spi/spi-dw-dma.c Joy Chakraborty 2023-03-26  248  	case 3:
80de96dae70648 drivers/spi/spi-dw-dma.c Joy Chakraborty 2023-03-26  249  	case 4:
80de96dae70648 drivers/spi/spi-dw-dma.c Joy Chakraborty 2023-03-26  250  		return DMA_SLAVE_BUSWIDTH_4_BYTES;
80de96dae70648 drivers/spi/spi-dw-dma.c Joy Chakraborty 2023-03-26  251  	default:
e31abce778bc05 drivers/spi/spi-dw-mid.c Andy Shevchenko 2015-03-09  252  		return DMA_SLAVE_BUSWIDTH_UNDEFINED;
e31abce778bc05 drivers/spi/spi-dw-mid.c Andy Shevchenko 2015-03-09  253  	}
80de96dae70648 drivers/spi/spi-dw-dma.c Joy Chakraborty 2023-03-26  254  }
e31abce778bc05 drivers/spi/spi-dw-mid.c Andy Shevchenko 2015-03-09  255  

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