linux-kernel - drivers/gpu/drm/amd/amdgpu/../display/dc/link/link_validation.c:351:13: warning: variable 'bw

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Date:   Fri, 28 Apr 2023 07:02:44 +0800
From:   kernel test robot <lkp@...el.com>
To:     Mustapha Ghaddar <mghaddar@....com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Alex Deucher <alexander.deucher@....com>,
        Kshitij Bhardwaj <kshitij.bhardwaj1@....com>
Subject: drivers/gpu/drm/amd/amdgpu/../display/dc/link/link_validation.c:351:13:
 warning: variable 'bw_needed' set but not used

Hi Mustapha,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   cec24b8b6bb841a19b5c5555b600a511a8988100
commit: a8b537605e22bfe277e666727fa0e9e01f2c729b drm/amd/display: Add function pointer for validate bw usb4
date:   5 weeks ago
config: alpha-randconfig-r032-20230427 (https://download.01.org/0day-ci/archive/20230428/202304280633.PIOK67I0-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 12.1.0
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a8b537605e22bfe277e666727fa0e9e01f2c729b
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout a8b537605e22bfe277e666727fa0e9e01f2c729b
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=alpha olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=alpha SHELL=/bin/bash drivers/gpu/drm/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304280633.PIOK67I0-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/amd/amdgpu/../display/dc/link/link_validation.c: In function 'link_validate_dpia_bandwidth':
>> drivers/gpu/drm/amd/amdgpu/../display/dc/link/link_validation.c:352:25: warning: variable 'link' set but not used [-Wunused-but-set-variable]
     352 |         struct dc_link *link[MAX_DPIA_NUM];
         |                         ^~~~
>> drivers/gpu/drm/amd/amdgpu/../display/dc/link/link_validation.c:351:13: warning: variable 'bw_needed' set but not used [-Wunused-but-set-variable]
     351 |         int bw_needed[MAX_DPIA_NUM];
         |             ^~~~~~~~~


vim +/bw_needed +351 drivers/gpu/drm/amd/amdgpu/../display/dc/link/link_validation.c

   347	
   348	bool link_validate_dpia_bandwidth(const struct dc_stream_state *stream, const unsigned int num_streams)
   349	{
   350		bool ret = true;
 > 351		int bw_needed[MAX_DPIA_NUM];
 > 352		struct dc_link *link[MAX_DPIA_NUM];

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