tree: https://github.com/frank-w/BPI-R2-4.14 5.16-r2pro head: a31581f05931a1cdc2dcda71296d0cb62047cce4 commit: 2f48fb62ca7dc4787f6a56a9e183c0c90a38dba6 [15/47] mt76: allow loading eeprom from file config: i386-randconfig-s001-20211218 (https://download.01.org/0day-ci/archive/20211219/202112190048.7mQwWK1u-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # https://github.com/frank-w/BPI-R2-4.14/commit/2f48fb62ca7dc4787f6a56a9e18... git remote add frank-w-bpi-r2-4.14 https://github.com/frank-w/BPI-R2-4.14 git fetch --no-tags frank-w-bpi-r2-4.14 5.16-r2pro git checkout 2f48fb62ca7dc4787f6a56a9e183c0c90a38dba6 # save the config file to linux build tree mkdir build_dir make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash drivers/net/wireless/mediatek/mt76/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) vim +48 drivers/net/wireless/mediatek/mt76/eeprom.c 11 12 static int 13 mt76_get_eeprom_file(struct mt76_dev *dev, int len) 14 { 15 char path[64]=""; 16 struct file *fp; 17 loff_t pos=0; 18 int ret; 19 struct inode *inode = NULL; 20 loff_t size; 21 22 ret = snprintf(path,sizeof(path),"/lib/firmware/mediatek/%s_rf.bin",dev->dev->driver->name); 23 if(ret<0) 24 return -EINVAL; 25 dev_info(dev->dev,"Load eeprom: %s\n",path); 26 fp = filp_open(path, O_RDONLY, 0); 27 if (IS_ERR(fp)) { 28 dev_info(dev->dev,"Open eeprom file failed: %s\n",path); 29 return -ENOENT; 30 } 31 32 inode = file_inode(fp); 33 if ((!S_ISREG(inode->i_mode) && !S_ISBLK(inode->i_mode))) { 34 printk(KERN_ALERT "invalid file type: %s\n", path); 35 return -ENOENT; 36 } 37 size = i_size_read(inode->i_mapping->host); 38 if (size < 0) 39 { 40 printk(KERN_ALERT "failed getting size of %s size:%lld \n",path,size); 41 return -ENOENT; 42 } 43 ret = kernel_read(fp, dev->eeprom.data, len, &pos); 44 if(ret < size){ 45 dev_info(dev->dev,"Load eeprom ERR, count %d byte (len:%d)\n",ret,len); 46 return -ENOENT; 47 } 49 dev_info(dev->dev,"Load eeprom OK, count %d byte\n",ret); 50 51 return 0; 52 } 53 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org