[chrome-os:chromeos-5.10 27/36] drivers/net/wireless/mediatek/mt76/mt7921/mcu.c:148:40: warning: variable 'res' set but not used

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

tree:   https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-5.10
head:   44452e4236561f6e36ec587805a52b683e2804c9
commit: ba11d449cc75d38642771c4254d9ac6cca0dab30 [27/36] FROMLIST: mt76: mt7921: fix kernel panic by accessing unallocated eeprom.data
config: arc-randconfig-r043-20230409 (https://download.01.org/0day-ci/archive/20230414/202304140025.JDd41CCB-lkp@intel.com/config)
compiler: arceb-elf-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
        git remote add chrome-os https://chromium.googlesource.com/chromiumos/third_party/kernel
        git fetch --no-tags chrome-os chromeos-5.10
        git checkout ba11d449cc75d38642771c4254d9ac6cca0dab30
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash M=drivers/net/wireless/mediatek/mt76/mt7921

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/202304140025.JDd41CCB-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/net/wireless/mediatek/mt76/mt7921/mcu.c: In function 'mt7921_mcu_parse_eeprom':
>> drivers/net/wireless/mediatek/mt76/mt7921/mcu.c:148:40: warning: variable 'res' set but not used [-Wunused-but-set-variable]
     148 |         struct mt7921_mcu_eeprom_info *res;
         |                                        ^~~


vim +/res +148 drivers/net/wireless/mediatek/mt76/mt7921/mcu.c

da3e3b87f8dd3d4 Sean Wang 2021-01-28  144  
da3e3b87f8dd3d4 Sean Wang 2021-01-28  145  static int
da3e3b87f8dd3d4 Sean Wang 2021-01-28  146  mt7921_mcu_parse_eeprom(struct mt76_dev *dev, struct sk_buff *skb)
da3e3b87f8dd3d4 Sean Wang 2021-01-28  147  {
da3e3b87f8dd3d4 Sean Wang 2021-01-28 @148  	struct mt7921_mcu_eeprom_info *res;
da3e3b87f8dd3d4 Sean Wang 2021-01-28  149  
da3e3b87f8dd3d4 Sean Wang 2021-01-28  150  	if (!skb)
da3e3b87f8dd3d4 Sean Wang 2021-01-28  151  		return -EINVAL;
da3e3b87f8dd3d4 Sean Wang 2021-01-28  152  
da3e3b87f8dd3d4 Sean Wang 2021-01-28  153  	skb_pull(skb, sizeof(struct mt7921_mcu_rxd));
da3e3b87f8dd3d4 Sean Wang 2021-01-28  154  
da3e3b87f8dd3d4 Sean Wang 2021-01-28  155  	res = (struct mt7921_mcu_eeprom_info *)skb->data;
da3e3b87f8dd3d4 Sean Wang 2021-01-28  156  
da3e3b87f8dd3d4 Sean Wang 2021-01-28  157  	return 0;
da3e3b87f8dd3d4 Sean Wang 2021-01-28  158  }
da3e3b87f8dd3d4 Sean Wang 2021-01-28  159  

:::::: The code at line 148 was first introduced by commit
:::::: da3e3b87f8dd3d44e83c7ab744bd1ad6ab9f8468 UPSTREAM: mt76: mt7921: add MCU support

:::::: TO: Sean Wang <sean.wang@mediatek.com>
:::::: CC: Commit Bot <commit-bot@chromium.org>

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