Hi Chunyan, I love your patch! Yet something to improve: [auto build test ERROR on wsa/i2c/for-next] [also build test ERROR on v5.10-rc7 next-20201211] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Chunyan-Zhang/i2c-sprd-use-a-spe... base: https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git i2c/for-next config: mips-randconfig-r035-20201209 (attached as .config) compiler: mipsel-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://github.com/0day-ci/linux/commit/725c61cfaa18f63c1fbc7f4a25a04a72c... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Chunyan-Zhang/i2c-sprd-use-a-specific-timeout-to-avoid-system-hang-up-issue/20201211-182817 git checkout 725c61cfaa18f63c1fbc7f4a25a04a72c4fbda48 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 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 errors (new ones prefixed by >>): drivers/i2c/busses/i2c-sprd.c: In function 'sprd_i2c_handle_msg': 249 | unsigned long timeout = msecs_to_jiffies(I2C_XFER_TIMEOUT); | ^~~~~~~~~~~~~~~~ | IC2_XFER_TIMEOUT drivers/i2c/busses/i2c-sprd.c:249:43: note: each undeclared identifier is reported only once for each function it appears in vim +249 drivers/i2c/busses/i2c-sprd.c 244 245 static int sprd_i2c_handle_msg(struct i2c_adapter *i2c_adap, 246 struct i2c_msg *msg, bool is_last_msg) 247 { 248 struct sprd_i2c *i2c_dev = i2c_adap->algo_data; 250 251 i2c_dev->msg = msg; 252 i2c_dev->buf = msg->buf; 253 i2c_dev->count = msg->len; 254 255 reinit_completion(&i2c_dev->complete); 256 sprd_i2c_reset_fifo(i2c_dev); 257 sprd_i2c_set_devaddr(i2c_dev, msg); 258 sprd_i2c_set_count(i2c_dev, msg->len); 259 260 if (msg->flags & I2C_M_RD) { 261 sprd_i2c_opt_mode(i2c_dev, 1); 262 sprd_i2c_send_stop(i2c_dev, 1); 263 } else { 264 sprd_i2c_opt_mode(i2c_dev, 0); 265 sprd_i2c_send_stop(i2c_dev, !!is_last_msg); 266 } 267 268 /* 269 * We should enable rx fifo full interrupt to get data when receiving 270 * full data. 271 */ 272 if (msg->flags & I2C_M_RD) 273 sprd_i2c_set_fifo_full_int(i2c_dev, 1); 274 else 275 sprd_i2c_data_transfer(i2c_dev); 276 277 sprd_i2c_opt_start(i2c_dev); 278 279 timeout = wait_for_completion_timeout(&i2c_dev->complete, timeout); 280 if (!timeout) 281 return -EIO; 282 283 return i2c_dev->err; 284 } 285 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org