Hi Pavel, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on staging/staging-testing] url: https://github.com/0day-ci/linux/commits/Pavel-Skripkin/staging-r8188eu-r... base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git 093991aaadf0fbb34184fa37a46e7a157da3f386 config: arc-allyesconfig (attached as .config) compiler: arceb-elf-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/2b557bc2dab8449fa9bb37a8a4c36b071... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Pavel-Skripkin/staging-r8188eu-remove-read-write-_macreg/20210822-233538 git checkout 2b557bc2dab8449fa9bb37a8a4c36b0714b007f7 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arc 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/staging/r8188eu/os_dep/ioctl_linux.c: In function 'rtw_dbg_mode_hdl': 2258 | int error; | ^~~~~ vim +/error +2258 drivers/staging/r8188eu/os_dep/ioctl_linux.c 2250 2251 static void rtw_dbg_mode_hdl(struct adapter *padapter, u32 id, u8 *pdata, u32 len) 2252 { 2253 struct mp_rw_reg *RegRWStruct; 2254 struct rf_reg_param *prfreg; 2255 u8 path; 2256 u8 offset; 2257 u32 value; 2259 2260 DBG_88E("%s\n", __func__); 2261 2262 switch (id) { 2263 case GEN_MP_IOCTL_SUBCODE(MP_START): 2264 DBG_88E("871x_driver is only for normal mode, can't enter mp mode\n"); 2265 break; 2266 case GEN_MP_IOCTL_SUBCODE(READ_REG): 2267 RegRWStruct = (struct mp_rw_reg *)pdata; 2268 switch (RegRWStruct->width) { 2269 case 1: 2270 error = rtw_read8(padapter, RegRWStruct->offset, 2271 (u8 *) &RegRWStruct->value); 2272 break; 2273 case 2: 2274 RegRWStruct->value = rtw_read16(padapter, RegRWStruct->offset); 2275 break; 2276 case 4: 2277 RegRWStruct->value = rtw_read32(padapter, RegRWStruct->offset); 2278 break; 2279 default: 2280 break; 2281 } 2282 2283 break; 2284 case GEN_MP_IOCTL_SUBCODE(WRITE_REG): 2285 RegRWStruct = (struct mp_rw_reg *)pdata; 2286 switch (RegRWStruct->width) { 2287 case 1: 2288 rtw_write8(padapter, RegRWStruct->offset, (u8)RegRWStruct->value); 2289 break; 2290 case 2: 2291 rtw_write16(padapter, RegRWStruct->offset, (u16)RegRWStruct->value); 2292 break; 2293 case 4: 2294 rtw_write32(padapter, RegRWStruct->offset, (u32)RegRWStruct->value); 2295 break; 2296 default: 2297 break; 2298 } 2299 2300 break; 2301 case GEN_MP_IOCTL_SUBCODE(READ_RF_REG): 2302 2303 prfreg = (struct rf_reg_param *)pdata; 2304 2305 path = (u8)prfreg->path; 2306 offset = (u8)prfreg->offset; 2307 2308 value = rtw_hal_read_rfreg(padapter, path, offset, 0xffffffff); 2309 2310 prfreg->value = value; 2311 2312 break; 2313 case GEN_MP_IOCTL_SUBCODE(WRITE_RF_REG): 2314 2315 prfreg = (struct rf_reg_param *)pdata; 2316 2317 path = (u8)prfreg->path; 2318 offset = (u8)prfreg->offset; 2319 value = prfreg->value; 2320 2321 rtw_hal_write_rfreg(padapter, path, offset, 0xffffffff, value); 2322 2323 break; 2324 case GEN_MP_IOCTL_SUBCODE(TRIGGER_GPIO): 2325 DBG_88E("==> trigger gpio 0\n"); 2326 rtw_hal_set_hwreg(padapter, HW_VAR_TRIGGER_GPIO_0, NULL); 2327 break; 2328 case GEN_MP_IOCTL_SUBCODE(GET_WIFI_STATUS): 2329 *pdata = rtw_hal_sreset_get_wifi_status(padapter); 2330 break; 2331 default: 2332 break; 2333 } 2334 } 2335 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org