[PATCH v2] drm/dbi: Print errors for mipi_dbi_command()

[kernel test robot]

Hi Linus,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.13 next-20210701]
[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/Linus-Walleij/drm-dbi-Print-errors-for-mipi_dbi_command/20210702-180745
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3dbdb38e286903ec220aaf1fb29a8d94297da246
config: arm64-randconfig-r001-20210702 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9eb613b2de3163686b1a4bd1160f15ac56a4b083)
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 arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://github.com/0day-ci/linux/commit/42d93a52e398adbb1fe2dfbc895c649cc8d42780
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Linus-Walleij/drm-dbi-Print-errors-for-mipi_dbi_command/20210702-180745
        git checkout 42d93a52e398adbb1fe2dfbc895c649cc8d42780
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash arch/arm64/kvm/ drivers/gpu/drm/tiny/

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

All errors (new ones prefixed by >>):

>> drivers/gpu/drm/tiny/st7586.c:260:2: error: member reference type 'struct mipi_dbi' is not a pointer; did you mean to use '.'?
           mipi_dbi_command(&dbidev->dbi, MIPI_DCS_SET_DISPLAY_OFF);
           ^                 ~~~~~~~~~~~
   include/drm/drm_mipi_dbi.h:186:27: note: expanded from macro 'mipi_dbi_command'
           struct device *dev = &dbi->spi->dev; \
                                 ~~~^
>> drivers/gpu/drm/tiny/st7586.c:260:2: error: cannot take the address of an rvalue of type 'struct device *'
           mipi_dbi_command(&dbidev->dbi, MIPI_DCS_SET_DISPLAY_OFF);
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/drm/drm_mipi_dbi.h:186:23: note: expanded from macro 'mipi_dbi_command'
           struct device *dev = &dbi->spi->dev; \
                                ^~~~~~~~~~~~~~
   2 errors generated.


vim +260 drivers/gpu/drm/tiny/st7586.c

eac99d4a2013d9 drivers/gpu/drm/tinydrm/st7586.c David Lechner  2017-08-07  246  
eac99d4a2013d9 drivers/gpu/drm/tinydrm/st7586.c David Lechner  2017-08-07  247  static void st7586_pipe_disable(struct drm_simple_display_pipe *pipe)
eac99d4a2013d9 drivers/gpu/drm/tinydrm/st7586.c David Lechner  2017-08-07  248  {
84137b866e834a drivers/gpu/drm/tinydrm/st7586.c Noralf Trønnes 2019-07-22  249  	struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
eac99d4a2013d9 drivers/gpu/drm/tinydrm/st7586.c David Lechner  2017-08-07  250  
9d5645ad1b979c drivers/gpu/drm/tinydrm/st7586.c Noralf Trønnes 2019-02-25  251  	/*
9d5645ad1b979c drivers/gpu/drm/tinydrm/st7586.c Noralf Trønnes 2019-02-25  252  	 * This callback is not protected by drm_dev_enter/exit since we want to
9d5645ad1b979c drivers/gpu/drm/tinydrm/st7586.c Noralf Trønnes 2019-02-25  253  	 * turn off the display on regular driver unload. It's highly unlikely
9d5645ad1b979c drivers/gpu/drm/tinydrm/st7586.c Noralf Trønnes 2019-02-25  254  	 * that the underlying SPI controller is gone should this be called after
9d5645ad1b979c drivers/gpu/drm/tinydrm/st7586.c Noralf Trønnes 2019-02-25  255  	 * unplug.
9d5645ad1b979c drivers/gpu/drm/tinydrm/st7586.c Noralf Trønnes 2019-02-25  256  	 */
9d5645ad1b979c drivers/gpu/drm/tinydrm/st7586.c Noralf Trønnes 2019-02-25  257  
eac99d4a2013d9 drivers/gpu/drm/tinydrm/st7586.c David Lechner  2017-08-07  258  	DRM_DEBUG_KMS("\n");
eac99d4a2013d9 drivers/gpu/drm/tinydrm/st7586.c David Lechner  2017-08-07  259  
84137b866e834a drivers/gpu/drm/tinydrm/st7586.c Noralf Trønnes 2019-07-22 @260  	mipi_dbi_command(&dbidev->dbi, MIPI_DCS_SET_DISPLAY_OFF);
eac99d4a2013d9 drivers/gpu/drm/tinydrm/st7586.c David Lechner  2017-08-07  261  }
eac99d4a2013d9 drivers/gpu/drm/tinydrm/st7586.c David Lechner  2017-08-07  262  

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