[linux-next:master 488/13664] drivers/gpu/drm/i915/display/intel_color.c:1400 intel_color_prepare_commit() warn: ignoring unreachable code.

[linux-next:master 488/13664] drivers/gpu/drm/i915/display/intel_color.c:1400 intel_color_prepare_commit() warn: ignoring unreachable code.

[kernel test robot]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: Linux Memory Management List <linux-mm@kvack.org>
TO: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
CC: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
CC: Uma Shankar <uma.shankar@intel.com>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   465461cf48465b8a0a54025db5ae2b3df7a04577
commit: 2487ae0bcb53a7d4180c551c02b1f318ea590c84 [488/13664] drm/i915: Disable DSB usage specifically for LUTs
:::::: branch date: 3 hours ago
:::::: commit date: 2 months ago
config: x86_64-randconfig-m001-20230213 (https://download.01.org/0day-ci/archive/20230221/202302211707.9malP4N2-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Link: https://lore.kernel.org/r/202302211707.9malP4N2-lkp@intel.com/

New smatch warnings:
drivers/gpu/drm/i915/display/intel_color.c:1400 intel_color_prepare_commit() warn: ignoring unreachable code.

Old smatch warnings:
drivers/gpu/drm/i915/display/intel_color.c:2579 i9xx_read_lut_10() error: uninitialized symbol 'ldw'.
drivers/gpu/drm/i915/display/intel_color.c:2579 i9xx_read_lut_10() error: uninitialized symbol 'udw'.

vim +1400 drivers/gpu/drm/i915/display/intel_color.c

4d8ed54c044703 drivers/gpu/drm/i915/intel_color.c         Ville Syrjälä 2019-02-05  1392  
efb2b57edf20c3 drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä 2022-11-23  1393  void intel_color_prepare_commit(struct intel_crtc_state *crtc_state)
efb2b57edf20c3 drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä 2022-11-23  1394  {
b358c3b98813b1 drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä 2022-11-23  1395  	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
b358c3b98813b1 drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä 2022-11-23  1396  
2487ae0bcb53a7 drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä 2022-11-23  1397  	/* FIXME DSB has issues loading LUTs, disable it for now */
2487ae0bcb53a7 drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä 2022-11-23  1398  	return;
2487ae0bcb53a7 drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä 2022-11-23  1399  
b358c3b98813b1 drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä 2022-11-23 @1400  	crtc_state->dsb = intel_dsb_prepare(crtc);
efb2b57edf20c3 drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä 2022-11-23  1401  }
efb2b57edf20c3 drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä 2022-11-23  1402  

:::::: The code at line 1400 was first introduced by commit
:::::: b358c3b98813b1557588a11c894b22915251a2ce drm/i915: Make DSB lower level

:::::: TO: Ville Syrjälä <ville.syrjala@linux.intel.com>
:::::: CC: Ville Syrjälä <ville.syrjala@linux.intel.com>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests