[xilinx-xlnx:xlnx_rebase_v5.4 217/1767] drivers/media/i2c/adv7511-v4l2.c:427:9: warning: 'return' with a value, in function returning void

[kernel test robot]

tree:   https://github.com/Xilinx/linux-xlnx xlnx_rebase_v5.4
head:   1ad9b65f0dbe2b3ecc22a498e75a48d8ee39bbda
commit: 9836a252284b997aacd6b86766514a0bb84b4f43 [217/1767] drivers: media: Customized adv7511 for Xylon LogiCVC (deprecated)
config: x86_64-randconfig-a015-20211004 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/Xilinx/linux-xlnx/commit/9836a252284b997aacd6b86766514a0bb84b4f43
        git remote add xilinx-xlnx https://github.com/Xilinx/linux-xlnx
        git fetch --no-tags xilinx-xlnx xlnx_rebase_v5.4
        git checkout 9836a252284b997aacd6b86766514a0bb84b4f43
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

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

All warnings (new ones prefixed by >>):

   drivers/media/i2c/adv7511-v4l2.c: In function 'adv7511_set_rgb_quantization_mode':
>> drivers/media/i2c/adv7511-v4l2.c:427:9: warning: 'return' with a value, in function returning void [-Wreturn-type]
     427 |  return 0;
         |         ^
   drivers/media/i2c/adv7511-v4l2.c:422:13: note: declared here
     422 | static void adv7511_set_rgb_quantization_mode(struct v4l2_subdev *sd, struct v4l2_ctrl *ctrl)
         |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/media/i2c/adv7511-v4l2.c: At top level:
   drivers/media/i2c/adv7511-v4l2.c:2251:21: warning: no previous prototype for 'adv7511_subdev' [-Wmissing-prototypes]
    2251 | struct v4l2_subdev *adv7511_subdev(struct v4l2_subdev *sd)
         |                     ^~~~~~~~~~~~~~


vim +/return +427 drivers/media/i2c/adv7511-v4l2.c

   421	
   422	static void adv7511_set_rgb_quantization_mode(struct v4l2_subdev *sd, struct v4l2_ctrl *ctrl)
   423	{
   424		struct adv7511_state *state = get_adv7511_state(sd);
   425	
   426	#ifdef XYLON_LOGICVC_INTG
 > 427		return 0;
   428	#endif
   429	
   430		/* Only makes sense for RGB formats */
   431		if (state->fmt_code != MEDIA_BUS_FMT_RGB888_1X24) {
   432			/* so just keep quantization */
   433			adv7511_csc_rgb_full2limit(sd, false);
   434			return;
   435		}
   436	
   437		switch (ctrl->val) {
   438		case V4L2_DV_RGB_RANGE_AUTO:
   439			/* automatic */
   440			if (state->dv_timings.bt.flags & V4L2_DV_FL_IS_CE_VIDEO) {
   441				/* CE format, RGB limited range (16-235) */
   442				adv7511_csc_rgb_full2limit(sd, true);
   443			} else {
   444				/* not CE format, RGB full range (0-255) */
   445				adv7511_csc_rgb_full2limit(sd, false);
   446			}
   447			break;
   448		case V4L2_DV_RGB_RANGE_LIMITED:
   449			/* RGB limited range (16-235) */
   450			adv7511_csc_rgb_full2limit(sd, true);
   451			break;
   452		case V4L2_DV_RGB_RANGE_FULL:
   453			/* RGB full range (0-255) */
   454			adv7511_csc_rgb_full2limit(sd, false);
   455			break;
   456		}
   457	}
   458	

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