Hi Zijun, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on bluetooth-next/master] [also build test WARNING on linus/master v5.14-rc7 next-20210824] [cannot apply to linux/master bluetooth/master] [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/Zijun-Hu/Bluetooth-btusb-Add-sup... base: https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git master config: parisc-buildonly-randconfig-r001-20210824 (attached as .config) compiler: hppa-linux-gcc (GCC) 11.2.0 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/a84ff3a51be3309837a325cd826083a72... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Zijun-Hu/Bluetooth-btusb-Add-support-using-different-nvm-for-variant-WCN6855-controller/20210824-162956 git checkout a84ff3a51be3309837a325cd826083a72bbf48f0 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=parisc 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/bluetooth/btusb.c: In function 'btusb_generate_qca_nvm_name': 3349 | snprintf(fwname, sizeof(fwname), "qca/nvm_usb_%08x%s%s.bin", | ^ drivers/bluetooth/btusb.c:3349:34: error: passing argument 1 of 'snprintf' from incompatible pointer type [-Werror=incompatible-pointer-types] 3349 | snprintf(fwname, sizeof(fwname), "qca/nvm_usb_%08x%s%s.bin", | ^~~~~~ | | | char ** In file included from include/linux/list.h:9, from include/linux/dmi.h:5, from drivers/bluetooth/btusb.c:9: include/linux/kernel.h:204:20: note: expected 'char *' but argument is of type 'char **' 204 | int snprintf(char *buf, size_t size, const char *fmt, ...); | ~~~~~~^~~ drivers/bluetooth/btusb.c:3354:48: warning: argument to 'sizeof' in 'snprintf' call is the same expression as the destination; did you mean to provide an explicit length? [-Wsizeof-pointer-memaccess] 3354 | snprintf(fwname, sizeof(fwname), "qca/nvm_usb_%08x%s%s%04x.bin", | ^ drivers/bluetooth/btusb.c:3354:34: error: passing argument 1 of 'snprintf' from incompatible pointer type [-Werror=incompatible-pointer-types] 3354 | snprintf(fwname, sizeof(fwname), "qca/nvm_usb_%08x%s%s%04x.bin", | ^~~~~~ | | | char ** In file included from include/linux/list.h:9, from include/linux/dmi.h:5, from drivers/bluetooth/btusb.c:9: include/linux/kernel.h:204:20: note: expected 'char *' but argument is of type 'char **' 204 | int snprintf(char *buf, size_t size, const char *fmt, ...); | ~~~~~~^~~ drivers/bluetooth/btusb.c:3361:40: warning: argument to 'sizeof' in 'snprintf' call is the same expression as the destination; did you mean to provide an explicit length? [-Wsizeof-pointer-memaccess] 3361 | snprintf(fwname, sizeof(fwname), "qca/nvm_usb_%08x.bin", | ^ drivers/bluetooth/btusb.c:3361:26: error: passing argument 1 of 'snprintf' from incompatible pointer type [-Werror=incompatible-pointer-types] 3361 | snprintf(fwname, sizeof(fwname), "qca/nvm_usb_%08x.bin", | ^~~~~~ | | | char ** In file included from include/linux/list.h:9, from include/linux/dmi.h:5, from drivers/bluetooth/btusb.c:9: include/linux/kernel.h:204:20: note: expected 'char *' but argument is of type 'char **' 204 | int snprintf(char *buf, size_t size, const char *fmt, ...); | ~~~~~~^~~ drivers/bluetooth/btusb.c: In function 'btusb_setup_qca_load_nvm': drivers/bluetooth/btusb.c:3378:53: error: passing argument 1 of 'btusb_generate_qca_nvm_name' from incompatible pointer type [-Werror=incompatible-pointer-types] 3378 | btusb_generate_qca_nvm_name(&fwname, sizeof(fwname), ver, "gf"); | ^~~~~~~ | | | char (*)[64] drivers/bluetooth/btusb.c:3333:48: note: expected 'char **' but argument is of type 'char (*)[64]' 3333 | static void btusb_generate_qca_nvm_name(char **fwname, | ~~~~~~~^~~~~~ drivers/bluetooth/btusb.c:3381:53: error: passing argument 1 of 'btusb_generate_qca_nvm_name' from incompatible pointer type [-Werror=incompatible-pointer-types] 3381 | btusb_generate_qca_nvm_name(&fwname, sizeof(fwname), ver, NULL); | ^~~~~~~ | | | char (*)[64] drivers/bluetooth/btusb.c:3333:48: note: expected 'char **' but argument is of type 'char (*)[64]' 3333 | static void btusb_generate_qca_nvm_name(char **fwname, | ~~~~~~~^~~~~~ cc1: some warnings being treated as errors vim +3349 drivers/bluetooth/btusb.c 3332 3333 static void btusb_generate_qca_nvm_name(char **fwname, 3334 int max_size, 3335 struct qca_version *ver, 3336 char *foundry) 3337 { 3338 char *separator; 3339 u16 board_id; 3340 u32 rom_version; 3341 3342 separator = (foundry == NULL) ? "" : "_"; 3343 board_id = le16_to_cpu(ver->board_id); 3344 rom_version = le32_to_cpu(ver->rom_version); 3345 3346 if (((ver->flag >> 8) & 0xff) == QCA_FLAG_MULTI_NVM) { 3347 /* if boardid equal 0, use default nvm without surfix */ 3348 if (le16_to_cpu(ver->board_id) == 0x0) { 3350 rom_version, 3351 separator, 3352 foundry); 3353 } else { 3354 snprintf(fwname, sizeof(fwname), "qca/nvm_usb_%08x%s%s%04x.bin", 3355 rom_version, 3356 separator, 3357 foundry, 3358 board_id); 3359 } 3360 } else { 3361 snprintf(fwname, sizeof(fwname), "qca/nvm_usb_%08x.bin", 3362 rom_version); 3363 } 3364 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org