[xlnx:master 11563/12268] drivers/media/i2c/adv7511-v4l2.c:427:2: error: void function 'adv7511_set_rgb_quantization_mode' should not return a value

Hi Vishal,

First bad commit (maybe != root cause):

tree:   https://github.com/Xilinx/linux-xlnx master
head:   75fbe0f5df29b9b5d54ecfeea27f5a80848aa87f
commit: be1a315c549bd2d6be07219a14335d2e156db988 [11563/12268] staging: xlnxsync: Fix the uapi header license
config: x86_64-randconfig-a016-20210528 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 6505c630407c5feec818f0bb1c284f9eeebf2071)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/Xilinx/linux-xlnx/commit/be1a315c549bd2d6be07219a14335d2e156db988
        git remote add xlnx https://github.com/Xilinx/linux-xlnx
        git fetch --no-tags xlnx master
        git checkout be1a315c549bd2d6be07219a14335d2e156db988
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All errors (new ones prefixed by >>):

quoted

drivers/media/i2c/adv7511-v4l2.c:427:2: error: void function 'adv7511_set_rgb_quantization_mode' should not return a value [-Wreturn-type]

           return 0;
           ^      ~
   drivers/media/i2c/adv7511-v4l2.c:2251:21: warning: no previous prototype for function 'adv7511_subdev' [-Wmissing-prototypes]
   struct v4l2_subdev *adv7511_subdev(struct v4l2_subdev *sd)
                       ^
   drivers/media/i2c/adv7511-v4l2.c:2251:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   struct v4l2_subdev *adv7511_subdev(struct v4l2_subdev *sd)
   ^
   static 
   1 warning and 1 error generated.


vim +/adv7511_set_rgb_quantization_mode +427 drivers/media/i2c/adv7511-v4l2.c

5a544cce2177fe3 drivers/media/i2c/adv7511.c      Hans Verkuil        2013-08-23  421  
0a25a0125194639 drivers/media/i2c/adv7511.c      Hans Verkuil        2016-06-28  422  static void adv7511_set_rgb_quantization_mode(struct v4l2_subdev *sd, struct v4l2_ctrl *ctrl)
5a544cce2177fe3 drivers/media/i2c/adv7511.c      Hans Verkuil        2013-08-23  423  {
5a544cce2177fe3 drivers/media/i2c/adv7511.c      Hans Verkuil        2013-08-23  424  	struct adv7511_state *state = get_adv7511_state(sd);
5a544cce2177fe3 drivers/media/i2c/adv7511.c      Hans Verkuil        2013-08-23  425  
c2644339194bd7b drivers/media/i2c/adv7511-v4l2.c Radhey Shyam Pandey 2014-01-15  426  #ifdef XYLON_LOGICVC_INTG
c2644339194bd7b drivers/media/i2c/adv7511-v4l2.c Radhey Shyam Pandey 2014-01-15 @427  	return 0;
c2644339194bd7b drivers/media/i2c/adv7511-v4l2.c Radhey Shyam Pandey 2014-01-15  428  #endif
c2644339194bd7b drivers/media/i2c/adv7511-v4l2.c Radhey Shyam Pandey 2014-01-15  429  
0a25a0125194639 drivers/media/i2c/adv7511.c      Hans Verkuil        2016-06-28  430  	/* Only makes sense for RGB formats */
0a25a0125194639 drivers/media/i2c/adv7511.c      Hans Verkuil        2016-06-28  431  	if (state->fmt_code != MEDIA_BUS_FMT_RGB888_1X24) {
0a25a0125194639 drivers/media/i2c/adv7511.c      Hans Verkuil        2016-06-28  432  		/* so just keep quantization */
0a25a0125194639 drivers/media/i2c/adv7511.c      Hans Verkuil        2016-06-28  433  		adv7511_csc_rgb_full2limit(sd, false);
0a25a0125194639 drivers/media/i2c/adv7511.c      Hans Verkuil        2016-06-28  434  		return;
0a25a0125194639 drivers/media/i2c/adv7511.c      Hans Verkuil        2016-06-28  435  	}
0a25a0125194639 drivers/media/i2c/adv7511.c      Hans Verkuil        2016-06-28  436  
0a25a0125194639 drivers/media/i2c/adv7511.c      Hans Verkuil        2016-06-28  437  	switch (ctrl->val) {
0a25a0125194639 drivers/media/i2c/adv7511.c      Hans Verkuil        2016-06-28  438  	case V4L2_DV_RGB_RANGE_AUTO:
0a25a0125194639 drivers/media/i2c/adv7511.c      Hans Verkuil        2016-06-28  439  		/* automatic */
680fee04a227d60 drivers/media/i2c/adv7511.c      Hans Verkuil        2015-03-20  440  		if (state->dv_timings.bt.flags & V4L2_DV_FL_IS_CE_VIDEO) {
680fee04a227d60 drivers/media/i2c/adv7511.c      Hans Verkuil        2015-03-20  441  			/* CE format, RGB limited range (16-235) */
5a544cce2177fe3 drivers/media/i2c/adv7511.c      Hans Verkuil        2013-08-23  442  			adv7511_csc_rgb_full2limit(sd, true);
5a544cce2177fe3 drivers/media/i2c/adv7511.c      Hans Verkuil        2013-08-23  443  		} else {
680fee04a227d60 drivers/media/i2c/adv7511.c      Hans Verkuil        2015-03-20  444  			/* not CE format, RGB full range (0-255) */
5a544cce2177fe3 drivers/media/i2c/adv7511.c      Hans Verkuil        2013-08-23  445  			adv7511_csc_rgb_full2limit(sd, false);
5a544cce2177fe3 drivers/media/i2c/adv7511.c      Hans Verkuil        2013-08-23  446  		}
5a544cce2177fe3 drivers/media/i2c/adv7511.c      Hans Verkuil        2013-08-23  447  		break;
5a544cce2177fe3 drivers/media/i2c/adv7511.c      Hans Verkuil        2013-08-23  448  	case V4L2_DV_RGB_RANGE_LIMITED:
5a544cce2177fe3 drivers/media/i2c/adv7511.c      Hans Verkuil        2013-08-23  449  		/* RGB limited range (16-235) */
5a544cce2177fe3 drivers/media/i2c/adv7511.c      Hans Verkuil        2013-08-23  450  		adv7511_csc_rgb_full2limit(sd, true);
5a544cce2177fe3 drivers/media/i2c/adv7511.c      Hans Verkuil        2013-08-23  451  		break;
5a544cce2177fe3 drivers/media/i2c/adv7511.c      Hans Verkuil        2013-08-23  452  	case V4L2_DV_RGB_RANGE_FULL:
5a544cce2177fe3 drivers/media/i2c/adv7511.c      Hans Verkuil        2013-08-23  453  		/* RGB full range (0-255) */
5a544cce2177fe3 drivers/media/i2c/adv7511.c      Hans Verkuil        2013-08-23  454  		adv7511_csc_rgb_full2limit(sd, false);
5a544cce2177fe3 drivers/media/i2c/adv7511.c      Hans Verkuil        2013-08-23  455  		break;
5a544cce2177fe3 drivers/media/i2c/adv7511.c      Hans Verkuil        2013-08-23  456  	}
5a544cce2177fe3 drivers/media/i2c/adv7511.c      Hans Verkuil        2013-08-23  457  }
5a544cce2177fe3 drivers/media/i2c/adv7511.c      Hans Verkuil        2013-08-23  458  

:::::: The code at line 427 was first introduced by commit
:::::: c2644339194bd7be4ce6023d72f5e7a03f55ef6b drivers: media: Customized adv7511 for Xylon LogiCVC (deprecated)

:::::: TO: Radhey Shyam Pandey [off-list ref]
:::::: CC: Michal Simek [off-list ref]

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