[clangbuiltlinux:question_mark_operator 5/5] drivers/gpu/drm/drm_atomic.c:1305:1: warning: control reaches end of non-void function

[kernel test robot <lkp@intel.com>]

tree:   https://github.com/ClangBuiltLinux/linux question_mark_operator
head:   532a7ac2d57bb5674f5feffb4ba378f8a32f3bcf
commit: 532a7ac2d57bb5674f5feffb4ba378f8a32f3bcf [5/5] drm: atomic: use try operator ('?') and member access chaining
config: i386-randconfig-r132-20260912 (https://download.01.org/0day-ci/archive/20260912/202609121119.nj8F5jyV-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260912/202609121119.nj8F5jyV-lkp@intel.com/reproduce)

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
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202609121119.nj8F5jyV-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/drm_atomic.c: In function 'drm_atomic_get_old_crtc_for_encoder':
   drivers/gpu/drm/drm_atomic.c:1302:78: error: expected expression before ';' token
    1302 |         connector = drm_atomic_get_old_connector_for_encoder(state, encoder)?;
         |                                                                              ^
   drivers/gpu/drm/drm_atomic.c:1304:69: error: expected expression before '->' token
    1304 |         return drm_atomic_get_old_connector_state(state, connector)?->crtc;
         |                                                                     ^~
   drivers/gpu/drm/drm_atomic.c: In function 'drm_atomic_get_new_crtc_for_encoder':
   drivers/gpu/drm/drm_atomic.c:1325:78: error: expected expression before ';' token
    1325 |         connector = drm_atomic_get_new_connector_for_encoder(state, encoder)?;
         |                                                                              ^
   drivers/gpu/drm/drm_atomic.c:1327:69: error: expected expression before '->' token
    1327 |         return drm_atomic_get_new_connector_state(state, connector)?->crtc;
         |                                                                     ^~
   drivers/gpu/drm/drm_atomic.c: In function 'drm_atomic_get_old_crtc_for_encoder':
>> drivers/gpu/drm/drm_atomic.c:1305:1: warning: control reaches end of non-void function [-Wreturn-type]
    1305 | }
         | ^
   drivers/gpu/drm/drm_atomic.c: In function 'drm_atomic_get_new_crtc_for_encoder':
   drivers/gpu/drm/drm_atomic.c:1328:1: warning: control reaches end of non-void function [-Wreturn-type]
    1328 | }
         | ^


vim +1305 drivers/gpu/drm/drm_atomic.c

a7e4886e06f723 Maxime Ripard    2025-03-13  1283  
a7e4886e06f723 Maxime Ripard    2025-03-13  1284  
7b9a9e35e45def Vinod Polimera   2023-03-02  1285  /**
7b9a9e35e45def Vinod Polimera   2023-03-02  1286   * drm_atomic_get_old_crtc_for_encoder - Get old crtc for an encoder
7b9a9e35e45def Vinod Polimera   2023-03-02  1287   * @state: Atomic state
7b9a9e35e45def Vinod Polimera   2023-03-02  1288   * @encoder: The encoder to fetch the crtc state for
7b9a9e35e45def Vinod Polimera   2023-03-02  1289   *
7b9a9e35e45def Vinod Polimera   2023-03-02  1290   * This function finds and returns the crtc that was connected to @encoder
7b9a9e35e45def Vinod Polimera   2023-03-02  1291   * as specified by the @state.
7b9a9e35e45def Vinod Polimera   2023-03-02  1292   *
7b9a9e35e45def Vinod Polimera   2023-03-02  1293   * Returns: The old crtc connected to @encoder, or NULL if the encoder is
7b9a9e35e45def Vinod Polimera   2023-03-02  1294   * not connected.
7b9a9e35e45def Vinod Polimera   2023-03-02  1295   */
7b9a9e35e45def Vinod Polimera   2023-03-02  1296  struct drm_crtc *
5164f7e7ff8ec7 Maxime Ripard    2026-04-27  1297  drm_atomic_get_old_crtc_for_encoder(struct drm_atomic_commit *state,
7b9a9e35e45def Vinod Polimera   2023-03-02  1298  				    struct drm_encoder *encoder)
7b9a9e35e45def Vinod Polimera   2023-03-02  1299  {
7b9a9e35e45def Vinod Polimera   2023-03-02  1300  	struct drm_connector *connector;
7b9a9e35e45def Vinod Polimera   2023-03-02  1301  
532a7ac2d57bb5 Nick Desaulniers 2026-09-10  1302  	connector = drm_atomic_get_old_connector_for_encoder(state, encoder)?;
7b9a9e35e45def Vinod Polimera   2023-03-02  1303  
532a7ac2d57bb5 Nick Desaulniers 2026-09-10  1304  	return drm_atomic_get_old_connector_state(state, connector)?->crtc;
7b9a9e35e45def Vinod Polimera   2023-03-02 @1305  }
7b9a9e35e45def Vinod Polimera   2023-03-02  1306  EXPORT_SYMBOL(drm_atomic_get_old_crtc_for_encoder);
7b9a9e35e45def Vinod Polimera   2023-03-02  1307  

:::::: The code at line 1305 was first introduced by commit
:::::: 7b9a9e35e45def496b0a5b3f206bb4efa712ea4a drm: add helper functions to retrieve old and new crtc

:::::: TO: Vinod Polimera <quic_vpolimer@quicinc.com>
:::::: CC: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

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