[skeggsb-nouveau:01.03-gsp-ada 185/193] drivers/gpu/drm/nouveau/nvkm/engine/disp/r525.c:59:1: error: non-void function does not return a value in all control paths

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

tree:   https://gitlab.freedesktop.org/skeggsb/nouveau 01.03-gsp-ada
head:   ab3448c2873e0fbcf1fd710cccb52dc548bdf449
commit: c24815755c5c79d50fa9370ec1124fedd29743bb [185/193] disp
config: arm64-randconfig-r021-20230212 (https://download.01.org/0day-ci/archive/20230213/202302132206.uzzkoc7v-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db0e6591612b53910a1b366863348bdb9d7d2fb1)
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 arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        git remote add skeggsb-nouveau https://gitlab.freedesktop.org/skeggsb/nouveau
        git fetch --no-tags skeggsb-nouveau 01.03-gsp-ada
        git checkout c24815755c5c79d50fa9370ec1124fedd29743bb
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/gpu/drm/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302132206.uzzkoc7v-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/gpu/drm/nouveau/nvkm/engine/disp/r525.c:59:1: error: non-void function does not return a value in all control paths [-Werror,-Wreturn-type]
   }
   ^
   1 error generated.


vim +59 drivers/gpu/drm/nouveau/nvkm/engine/disp/r525.c

    46	
    47	static u64
    48	r525_chan_user(struct nvkm_disp_chan *chan, u64 *psize)
    49	{
    50		switch (chan->object.oclass & 0xff) {
    51		case 0x7d: *psize = 0x10000; return 0x680000;
    52		case 0x7e: *psize = 0x01000; return 0x690000 + (chan->head * *psize);
    53		case 0x7b: *psize = 0x01000; return 0x6b0000 + (chan->head * *psize);
    54		case 0x7a: *psize = 0x01000; return 0x6d8000 + (chan->head * *psize);
    55		default:
    56			BUG_ON(1);
    57			break;
    58		}
  > 59	}
    60	

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