tree: https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git renesas/i2c/smbus-cleanup head: 06a3965f7ca847f8c42e7715251164ba6255e2a2 commit: 06a3965f7ca847f8c42e7715251164ba6255e2a2 [14/14] ipmi: remove open coded version of SMBus block write config: powerpc-randconfig-p002-20210112 (attached as .config) compiler: powerpc-linux-gcc (GCC) 9.3.0 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/wsa/linux.git/commit/?id=... git remote add wsa https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git git fetch --no-tags wsa renesas/i2c/smbus-cleanup git checkout 06a3965f7ca847f8c42e7715251164ba6255e2a2 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc 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/char/ipmi/ipmb_dev_int.c:356:36: warning: 'acpi_ipmb_id' defined but not used [-Wunused-const-variable=] 356 | static const struct acpi_device_id acpi_ipmb_id[] = { | ^~~~~~~~~~~~ drivers/char/ipmi/ipmb_dev_int.c: In function 'ipmb_write': 173 | } | ^ vim +173 drivers/char/ipmi/ipmb_dev_int.c 042f057fe2dcf386 Vijay Khemka 2019-12-11 134 51bd6f291583684f Asmaa Mnebhi 2019-06-10 135 static ssize_t ipmb_write(struct file *file, const char __user *buf, 51bd6f291583684f Asmaa Mnebhi 2019-06-10 136 size_t count, loff_t *ppos) 51bd6f291583684f Asmaa Mnebhi 2019-06-10 137 { 51bd6f291583684f Asmaa Mnebhi 2019-06-10 138 struct ipmb_dev *ipmb_dev = to_ipmb_dev(file); 51bd6f291583684f Asmaa Mnebhi 2019-06-10 139 u8 rq_sa, netf_rq_lun, msg_len; 06a3965f7ca847f8 Wolfram Sang 2021-01-12 140 struct i2c_client temp_client; 51bd6f291583684f Asmaa Mnebhi 2019-06-10 141 u8 msg[MAX_MSG_LEN]; 51bd6f291583684f Asmaa Mnebhi 2019-06-10 142 ssize_t ret; 51bd6f291583684f Asmaa Mnebhi 2019-06-10 143 51bd6f291583684f Asmaa Mnebhi 2019-06-10 144 if (count > sizeof(msg)) 51bd6f291583684f Asmaa Mnebhi 2019-06-10 145 return -EINVAL; 51bd6f291583684f Asmaa Mnebhi 2019-06-10 146 51bd6f291583684f Asmaa Mnebhi 2019-06-10 147 if (copy_from_user(&msg, buf, count)) 51bd6f291583684f Asmaa Mnebhi 2019-06-10 148 return -EFAULT; 51bd6f291583684f Asmaa Mnebhi 2019-06-10 149 51bd6f291583684f Asmaa Mnebhi 2019-06-10 150 if (count < msg[0]) 51bd6f291583684f Asmaa Mnebhi 2019-06-10 151 return -EINVAL; 51bd6f291583684f Asmaa Mnebhi 2019-06-10 152 51bd6f291583684f Asmaa Mnebhi 2019-06-10 153 rq_sa = GET_7BIT_ADDR(msg[RQ_SA_8BIT_IDX]); 51bd6f291583684f Asmaa Mnebhi 2019-06-10 154 netf_rq_lun = msg[NETFN_LUN_IDX]; 51bd6f291583684f Asmaa Mnebhi 2019-06-10 155 042f057fe2dcf386 Vijay Khemka 2019-12-11 156 /* Check i2c block transfer vs smbus */ 042f057fe2dcf386 Vijay Khemka 2019-12-11 157 if (ipmb_dev->is_i2c_protocol) { 042f057fe2dcf386 Vijay Khemka 2019-12-11 158 ret = ipmb_i2c_write(ipmb_dev->client, msg, rq_sa); 042f057fe2dcf386 Vijay Khemka 2019-12-11 159 return (ret == 1) ? count : ret; 042f057fe2dcf386 Vijay Khemka 2019-12-11 160 } 042f057fe2dcf386 Vijay Khemka 2019-12-11 161 51bd6f291583684f Asmaa Mnebhi 2019-06-10 162 /* 06a3965f7ca847f8 Wolfram Sang 2021-01-12 163 * subtract rq_sa and netf_rq_lun from the length of the msg. Fill the 06a3965f7ca847f8 Wolfram Sang 2021-01-12 164 * temporary client. Note that its use is an exception for IPMI. 51bd6f291583684f Asmaa Mnebhi 2019-06-10 165 */ 51bd6f291583684f Asmaa Mnebhi 2019-06-10 166 msg_len = msg[IPMB_MSG_LEN_IDX] - SMBUS_MSG_HEADER_LENGTH; 06a3965f7ca847f8 Wolfram Sang 2021-01-12 167 memcpy(&temp_client, ipmb_dev->client, sizeof(temp_client)); 06a3965f7ca847f8 Wolfram Sang 2021-01-12 168 temp_client.addr = rq_sa; 21feadd024e74712 Arnd Bergmann 2019-06-19 169 06a3965f7ca847f8 Wolfram Sang 2021-01-12 170 ret = i2c_smbus_write_block_data(&temp_client, netf_rq_lun, msg_len, 06a3965f7ca847f8 Wolfram Sang 2021-01-12 171 msg + SMBUS_MSG_IDX_OFFSET); 06a3965f7ca847f8 Wolfram Sang 2021-01-12 172 return ret < 0 ? ret : count; 51bd6f291583684f Asmaa Mnebhi 2019-06-10 @173 } 51bd6f291583684f Asmaa Mnebhi 2019-06-10 174 :::::: The code at line 173 was first introduced by commit :::::: 51bd6f291583684f495ea498984dfc22049d7fd2 Add support for IPMB driver :::::: TO: Asmaa Mnebhi <Asmaa(a)mellanox.com&gt; :::::: CC: Corey Minyard <cminyard(a)mvista.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org