tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-4.4 head: 7254c60ea46ececa5041496f7907d0fcc582c1ae commit: 7c7d3263ef8b22d714decdbbaf463c66ce09c731 [13/14] BACKPORT: FROMGIT: media: cec: i2c: ch7322: Add ch7322 CEC controller driver config: alpha-allyesconfig (attached as .config) compiler: alpha-linux-gcc (GCC) 7.5.0 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 checkout 7c7d3263ef8b22d714decdbbaf463c66ce09c731 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 make.cross ARCH=alpha 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 >>): In file included from arch/alpha/include/asm/bug.h:22:0, from include/linux/bug.h:4, from include/linux/thread_info.h:11, from arch/alpha/include/asm/current.h:4, from include/linux/mutex.h:13, from include/linux/kernfs.h:13, from include/linux/sysfs.h:15, from include/linux/kobject.h:21, from include/linux/dmi.h:5, from drivers/media/cec/i2c/ch7322.c:17: include/linux/cpumask.h: In function 'cpumask_check': include/linux/cpumask.h:117:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] WARN_ON_ONCE(cpu >= nr_cpumask_bits); ^ include/asm-generic/bug.h:123:27: note: in definition of macro 'WARN_ON_ONCE' int __ret_warn_once = !!(condition); \ ^~~~~~~~~ drivers/media/cec/i2c/ch7322.c: In function 'ch7322_send_message': for (i = 0; i < len; i++) { ^ vim +197 drivers/media/cec/i2c/ch7322.c 163 164 static int ch7322_send_message(struct ch7322 *ch7322, const struct cec_msg *msg) 165 { 166 unsigned int val; 167 unsigned int len = msg->len; 168 int ret; 169 int i; 170 171 WARN_ON(!mutex_is_locked(&ch7322->mutex)); 172 173 if (len > CH7322_WRBUF_LEN || len < 1) 174 return -EINVAL; 175 176 ret = regmap_read(ch7322->regmap, CH7322_WRITE, &val); 177 if (ret) 178 return ret; 179 180 /* Buffer not ready */ 181 if (!(val & CH7322_WRITE_MSENT)) 182 return -EBUSY; 183 184 if (cec_msg_opcode(msg) == -1 && 185 cec_msg_initiator(msg) == cec_msg_destination(msg)) { 186 ch7322->tx_flags = CH7322_TX_FLAG_NACK | CH7322_TX_FLAG_RETRY; 187 } else if (cec_msg_is_broadcast(msg)) { 188 ch7322->tx_flags = CH7322_TX_FLAG_NACK; 189 } else { 190 ch7322->tx_flags = CH7322_TX_FLAG_RETRY; 191 } 192 193 ret = regmap_write(ch7322->regmap, CH7322_WRITE, len - 1); 194 if (ret) 195 return ret; 196 198 ret = regmap_write(ch7322->regmap, 199 CH7322_WRBUF + i, msg->msg[i]); 200 if (ret) 201 return ret; 202 } 203 204 return 0; 205 } 206 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org