tree: https://github.com/nbd168/wireless mt76 head: 322ec254cac2f270cd917c5e6bdf8c838ee0a2fc commit: bb99c31e5dd3c90300c540541d727d956862e30b [10/26] mt76: mt7915: fix potential overflow of eeprom page index config: mips-randconfig-r032-20210718 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 5d5b08761f944d5b9822d582378333cc4b36a0a7) 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 mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu # https://github.com/nbd168/wireless/commit/bb99c31e5dd3c90300c540541d727d9... git remote add nbd168-wireless https://github.com/nbd168/wireless git fetch --no-tags nbd168-wireless mt76 git checkout bb99c31e5dd3c90300c540541d727d956862e30b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:114:10: warning: implicit conversion from enumeration type 'enum mt76_cipher_type' to different enumeration type 'enum mcu_cipher_type' [-Wenum-conversion] return MT_CIPHER_NONE; ~~~~~~ ^~~~~~~~~~~~~~ if (i == total - 1 && MT7915_EEPROM_SIZE % PER_PAGE_SIZE) ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:3407:22: note: use '&' for a bitwise operation if (i == total - 1 && MT7915_EEPROM_SIZE % PER_PAGE_SIZE) ^~ & drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:3407:22: note: remove constant to silence this warning if (i == total - 1 && MT7915_EEPROM_SIZE % PER_PAGE_SIZE) ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2 warnings generated. vim +3407 drivers/net/wireless/mediatek/mt76/mt7915/mcu.c 3391 3392 static int mt7915_mcu_set_eeprom_flash(struct mt7915_dev *dev) 3393 { 3394 #define MAX_PAGE_IDX_MASK GENMASK(7, 5) 3395 #define PAGE_IDX_MASK GENMASK(4, 2) 3396 #define PER_PAGE_SIZE 0x400 3397 struct mt7915_mcu_eeprom req = { .buffer_mode = EE_MODE_BUFFER }; 3398 u8 total = DIV_ROUND_UP(MT7915_EEPROM_SIZE, PER_PAGE_SIZE); 3399 u8 *eep = (u8 *)dev->mt76.eeprom.data; 3400 int eep_len; 3401 int i; 3402 3403 for (i = 0; i < total; i++, eep += eep_len) { 3404 struct sk_buff *skb; 3405 int ret; 3406 3408 eep_len = MT7915_EEPROM_SIZE % PER_PAGE_SIZE; 3409 else 3410 eep_len = PER_PAGE_SIZE; 3411 3412 skb = mt76_mcu_msg_alloc(&dev->mt76, NULL, 3413 sizeof(req) + eep_len); 3414 if (!skb) 3415 return -ENOMEM; 3416 3417 req.format = FIELD_PREP(MAX_PAGE_IDX_MASK, total - 1) | 3418 FIELD_PREP(PAGE_IDX_MASK, i) | EE_FORMAT_WHOLE; 3419 req.len = cpu_to_le16(eep_len); 3420 3421 skb_put_data(skb, &req, sizeof(req)); 3422 skb_put_data(skb, eep, eep_len); 3423 3424 ret = mt76_mcu_skb_send_msg(&dev->mt76, skb, 3425 MCU_EXT_CMD(EFUSE_BUFFER_MODE), true); 3426 if (ret) 3427 return ret; 3428 } 3429 3430 return 0; 3431 } 3432 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org