tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-4.14 head: 6f8992e59d85c46b0273cd2a3a9ab9cea8ddb4a1 commit: 014bcd16d12923ffc3255dac663b73b309fbe88d [10/19] CHROMIUM: drm/evdi: Parse usb path in evdi's add sysfs attribute config: arm64-chromiumos-arm64-customedconfig-chrome-os:chromeos-4.14:1bf13820918c8ea2f8d01d646008dbc3c1cb5bee (attached as .config) compiler: aarch64-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 remote add chrome-os https://chromium.googlesource.com/chromiumos/third_party/kernel git fetch --no-tags chrome-os chromeos-4.14 git checkout 014bcd16d12923ffc3255dac663b73b309fbe88d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 make.cross ARCH=arm64 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/gpu/drm/evdi/evdi_drv.c: In function 'add_device_with_usb_path': char *itf_token = NULL; ^~~~~~~~~ cc1: all warnings being treated as errors vim +/itf_token +285 drivers/gpu/drm/evdi/evdi_drv.c 277 278 static ssize_t add_device_with_usb_path(__always_unused struct device *dev, 279 const char *buf, size_t count) 280 { 281 char *usb_path = kstrdup(buf, GFP_KERNEL); 282 char *temp_path = usb_path; 283 char *bus_token = NULL; 284 char *usb_token = NULL; 286 287 temp_path = strnstr(temp_path, "usb:", count); 288 if (!temp_path) 289 goto err_parse_usb_path; 290 291 292 temp_path = strim(temp_path); 293 294 bus_token = strsep(&temp_path, ":"); 295 if (!bus_token) 296 goto err_parse_usb_path; 297 298 usb_token = strsep(&temp_path, ":"); 299 if (!usb_token) 300 goto err_parse_usb_path; 301 302 itf_token = strsep(&temp_path, ":"); 303 304 305 EVDI_INFO("Attaching to %s:%s\n", bus_token, usb_token); 306 return count; 307 308 err_parse_usb_path: 309 EVDI_ERROR("Unable to parse usb path: %s", buf); 310 kfree(usb_path); 311 return -EINVAL; 312 } 313 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org