drivers/gpu/drm/i915/display/intel_color.c:2392 i9xx_color_check() error: we previously assumed 'crtc_state->hw.gamma_lut' could be null (see line 2385)

drivers/gpu/drm/i915/display/intel_color.c:2392 i9xx_color_check() error: we previously assumed 'crtc_state->hw.gamma_lut' could be null (see line 2385)

[kernel test robot]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: Yury Norov <ynorov@nvidia.com>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f5bbbfec59b4e2fb7520a91de3df8a6174325d6a
commit: 09472f591aa0b72c2dd6c693f48b2d6fea66c7ba bitfield: wire __bf_shf to __builtin_ctzll
date:   3 months ago
:::::: branch date: 2 days ago
:::::: commit date: 3 months ago
config: x86_64-randconfig-161-20260813 (https://download.01.org/0day-ci/archive/20260813/202608131036.WHh1csLP-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
smatch: v0.5.0-9187-g5189e3fb

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Fixes: 09472f591aa0 ("bitfield: wire __bf_shf to __builtin_ctzll")
| Reported-by: kernel test robot <lkp@intel.com>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Closes: https://lore.kernel.org/r/202608131036.WHh1csLP-lkp@intel.com/

New smatch warnings:
drivers/gpu/drm/i915/display/intel_color.c:2392 i9xx_color_check() error: we previously assumed 'crtc_state->hw.gamma_lut' could be null (see line 2385)

Old smatch warnings:
drivers/gpu/drm/i915/display/intel_color.c:1544 ivb_load_luts() error: we previously assumed 'post_csc_lut' could be null (see line 1534)

vim +2392 drivers/gpu/drm/i915/display/intel_color.c

18f1b5ae7ecab0 drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä     2022-10-24  2371  
5f128aa1052e7d drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä     2024-05-23  2372  static int i9xx_color_check(struct intel_atomic_state *state,
5f128aa1052e7d drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä     2024-05-23  2373  			    struct intel_crtc *crtc)
e98f35624ca4a4 drivers/gpu/drm/i915/intel_color.c         Ville Syrjälä     2019-03-27  2374  {
9d476ce24f72fc drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä     2024-10-24  2375  	struct intel_display *display = to_intel_display(state);
5f128aa1052e7d drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä     2024-05-23  2376  	struct intel_crtc_state *crtc_state =
5f128aa1052e7d drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä     2024-05-23  2377  		intel_atomic_get_new_crtc_state(state, crtc);
e98f35624ca4a4 drivers/gpu/drm/i915/intel_color.c         Ville Syrjälä     2019-03-27  2378  	int ret;
e98f35624ca4a4 drivers/gpu/drm/i915/intel_color.c         Ville Syrjälä     2019-03-27  2379  
e98f35624ca4a4 drivers/gpu/drm/i915/intel_color.c         Ville Syrjälä     2019-03-27  2380  	ret = check_luts(crtc_state);
e98f35624ca4a4 drivers/gpu/drm/i915/intel_color.c         Ville Syrjälä     2019-03-27  2381  	if (ret)
e98f35624ca4a4 drivers/gpu/drm/i915/intel_color.c         Ville Syrjälä     2019-03-27  2382  		return ret;
e98f35624ca4a4 drivers/gpu/drm/i915/intel_color.c         Ville Syrjälä     2019-03-27  2383  
e98f35624ca4a4 drivers/gpu/drm/i915/intel_color.c         Ville Syrjälä     2019-03-27  2384  	crtc_state->gamma_enable =
1326a92c346641 drivers/gpu/drm/i915/display/intel_color.c Maarten Lankhorst 2019-10-31 @2385  		crtc_state->hw.gamma_lut &&
e98f35624ca4a4 drivers/gpu/drm/i915/intel_color.c         Ville Syrjälä     2019-03-27  2386  		!crtc_state->c8_planes;
e98f35624ca4a4 drivers/gpu/drm/i915/intel_color.c         Ville Syrjälä     2019-03-27  2387  
e262568eb58fe7 drivers/gpu/drm/i915/intel_color.c         Ville Syrjälä     2019-04-01  2388  	crtc_state->gamma_mode = i9xx_gamma_mode(crtc_state);
e98f35624ca4a4 drivers/gpu/drm/i915/intel_color.c         Ville Syrjälä     2019-03-27  2389  
9d476ce24f72fc drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä     2024-10-24  2390  	if (DISPLAY_VER(display) < 4 &&
67630bacae2354 drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä     2022-11-14  2391  	    crtc_state->gamma_mode == GAMMA_MODE_MODE_10BIT) {
dd3721a76f0b8a drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä     2024-10-24 @2392  		ret = i9xx_check_lut_10(crtc, crtc_state->hw.gamma_lut);
67630bacae2354 drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä     2022-11-14  2393  		if (ret)
67630bacae2354 drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä     2022-11-14  2394  			return ret;
67630bacae2354 drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä     2022-11-14  2395  	}
67630bacae2354 drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä     2022-11-14  2396  
5f128aa1052e7d drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä     2024-05-23  2397  	ret = intel_color_add_affected_planes(state, crtc);
e98f35624ca4a4 drivers/gpu/drm/i915/intel_color.c         Ville Syrjälä     2019-03-27  2398  	if (ret)
e98f35624ca4a4 drivers/gpu/drm/i915/intel_color.c         Ville Syrjälä     2019-03-27  2399  		return ret;
e98f35624ca4a4 drivers/gpu/drm/i915/intel_color.c         Ville Syrjälä     2019-03-27  2400  
18f1b5ae7ecab0 drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä     2022-10-24  2401  	intel_assign_luts(crtc_state);
18f1b5ae7ecab0 drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä     2022-10-24  2402  
5f128aa1052e7d drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä     2024-05-23  2403  	crtc_state->preload_luts = intel_can_preload_luts(state, crtc);
0ccc42a2fd5107 drivers/gpu/drm/i915/display/intel_color.c Ville Syrjälä     2019-10-30  2404  
e98f35624ca4a4 drivers/gpu/drm/i915/intel_color.c         Ville Syrjälä     2019-03-27  2405  	return 0;
e98f35624ca4a4 drivers/gpu/drm/i915/intel_color.c         Ville Syrjälä     2019-03-27  2406  }
e98f35624ca4a4 drivers/gpu/drm/i915/intel_color.c         Ville Syrjälä     2019-03-27  2407  

:::::: The code at line 2392 was first introduced by commit
:::::: dd3721a76f0b8a0054acc1befe5298a7bef47f07 drm/i915/color: Pimp debugs

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

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https://github.com/intel/lkp-tests/wiki