Hi Dongliang, Thank you for the patch! Yet something to improve: [auto build test ERROR on linuxtv-media/master] [also build test ERROR on v5.13-rc7 next-20210618] [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/Dongliang-Mu/media-dvb-usb-break... base: git://linuxtv.org/media_tree.git master config: arm64-randconfig-r014-20210621 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project e1adf90826a57b674eee79b071fb46c1f5683cd0) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/0day-ci/linux/commit/2cb920d86e9a83188dc0c72083640ca03... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Dongliang-Mu/media-dvb-usb-break-long-strings-in-dvb_usb_device_init/20210621-130906 git checkout 2cb920d86e9a83188dc0c72083640ca03e580a33 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang 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/media/usb/dvb-usb/dvb-usb-init.c:289:11: warning: missing terminating '"' character [-Winvalid-pp-token] deb_err("something went very wrong, ^ drivers/media/usb/dvb-usb/dvb-usb-init.c:290:51: warning: missing terminating '"' character [-Winvalid-pp-token] device was not found in current device list.\n"); ^ deb_err("something went very wrong, ^ drivers/media/usb/dvb-usb/dvb-usb-common.h:22:9: note: macro 'deb_err' defined here #define deb_err(args...) dprintk(dvb_usb_debug,0x010,args) ^ MODULE_LICENSE("GPL"); ^ drivers/media/usb/dvb-usb/dvb-usb-init.c:288:13: note: to match this '{' if (!desc) { ^ MODULE_LICENSE("GPL"); ^ drivers/media/usb/dvb-usb/dvb-usb-init.c:269:1: note: to match this '{' { ^ 2 warnings and 3 errors generated. vim +289 drivers/media/usb/dvb-usb/dvb-usb-init.c 261 262 /* 263 * USB 264 */ 265 int dvb_usb_device_init(struct usb_interface *intf, 266 const struct dvb_usb_device_properties *props, 267 struct module *owner, struct dvb_usb_device **du, 268 short *adapter_nums) 269 { 270 struct usb_device *udev = interface_to_usbdev(intf); 271 struct dvb_usb_device *d = NULL; 272 const struct dvb_usb_device_description *desc = NULL; 273 274 int ret = -ENOMEM, cold = 0; 275 276 if (du != NULL) 277 *du = NULL; 278 279 d = kzalloc(sizeof(*d), GFP_KERNEL); 280 if (!d) { 281 err("no memory for 'struct dvb_usb_device'"); 282 return -ENOMEM; 283 } 284 285 memcpy(&d->props, props, sizeof(struct dvb_usb_device_properties)); 286 287 desc = dvb_usb_find_device(udev, &d->props, &cold); 288 if (!desc) { 291 ret = -ENODEV; 292 goto error; 293 } 294 295 if (cold) { 296 info("found a %s in cold state, will try to load a firmware", 297 desc->name); 298 ret = dvb_usb_download_firmware(udev, props); 299 if (!props->no_reconnect || ret != 0) 300 goto error; 301 } 302 303 info("found a '%s' in warm state.", desc->name); 304 d->udev = udev; 305 d->desc = desc; 306 d->owner = owner; 307 308 usb_set_intfdata(intf, d); 309 310 ret = dvb_usb_init(d, adapter_nums); 311 if (ret) { 312 info("%s error while loading driver (%d)", desc->name, ret); 313 goto error; 314 } 315 316 if (du) 317 *du = d; 318 319 info("%s is successfully initialized and connected.", desc->name); 320 return 0; 321 322 error: 323 usb_set_intfdata(intf, NULL); 324 kfree(d); 325 return ret; 326 } 327 EXPORT_SYMBOL(dvb_usb_device_init); 328 329 void dvb_usb_device_exit(struct usb_interface *intf) 330 { 331 struct dvb_usb_device *d = usb_get_intfdata(intf); 332 const char *default_name = "generic DVB-USB module"; 333 char name[40]; 334 335 usb_set_intfdata(intf, NULL); 336 if (d != NULL && d->desc != NULL) { 337 strscpy(name, d->desc->name, sizeof(name)); 338 dvb_usb_exit(d); 339 } else { 340 strscpy(name, default_name, sizeof(name)); 341 } 342 info("%s successfully deinitialized and disconnected.", name); 343 344 } 345 EXPORT_SYMBOL(dvb_usb_device_exit); 346 347 MODULE_VERSION("1.0"); 348 MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher(a)posteo.de&gt;&quot;); 349 MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices"); --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org