tree: https://git.kernel.org/pub/scm/linux/kernel/git/kbingham/rcar.git gmsl/dev head: c2a69d794dc6686bf77f7565ae51d4f7a4e8cd99 commit: 4c58ea4fc47b843a848d2a4456dc4ec9d52d3cff [19/24] DNI: Regulator: Debug config: x86_64-randconfig-a004-20201016 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 5fbab4025eb57b12f2842ab188ff07a110708e1d) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/kbingham/rcar.git/commit/... git remote add rcar https://git.kernel.org/pub/scm/linux/kernel/git/kbingham/rcar.git git fetch --no-tags rcar gmsl/dev git checkout 4c58ea4fc47b843a848d2a4456dc4ec9d52d3cff # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 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 >>): dev_err(dev, "OF_GET_GPIO_REGULATOR_CONFIG %d\n", PTR_ERR(config)); ~~ ^~~~~~~~~~~~~~~ %ld include/linux/dev_printk.h:104:32: note: expanded from macro 'dev_err' _dev_err(dev, dev_fmt(fmt), ##__VA_ARGS__) ~~~ ^~~~~~~~~~~ 1 warning generated. vim +252 drivers/regulator/gpio-regulator.c 230 231 static int gpio_regulator_probe(struct platform_device *pdev) 232 { 233 struct device *dev = &pdev->dev; 234 struct gpio_regulator_config *config = dev_get_platdata(dev); 235 struct device_node *np = dev->of_node; 236 struct gpio_regulator_data *drvdata; 237 struct regulator_config cfg = { }; 238 struct regulator_dev *rdev; 239 enum gpiod_flags gflags; 240 int ptr, ret, state, i; 241 242 drvdata = devm_kzalloc(dev, sizeof(struct gpio_regulator_data), 243 GFP_KERNEL); 244 if (drvdata == NULL) 245 return -ENOMEM; 246 247 if (np) { 248 config = of_get_gpio_regulator_config(dev, np, 249 &drvdata->desc); 250 251 if (IS_ERR(config)) { 253 return PTR_ERR(config); 254 } 255 } 256 257 dev_err(dev, "Probing GPIO Regulator\n"); 258 259 drvdata->desc.name = devm_kstrdup(dev, config->supply_name, GFP_KERNEL); 260 if (drvdata->desc.name == NULL) { 261 dev_err(dev, "Failed to allocate supply name\n"); 262 return -ENOMEM; 263 } 264 265 drvdata->gpiods = devm_kzalloc(dev, sizeof(struct gpio_desc *), 266 GFP_KERNEL); 267 if (!drvdata->gpiods) 268 return -ENOMEM; 269 270 for (i = 0; i < config->ngpios; i++) { 271 drvdata->gpiods[i] = devm_gpiod_get_index(dev, 272 NULL, 273 i, 274 config->gflags[i]); 275 if (IS_ERR(drvdata->gpiods[i])) 276 return PTR_ERR(drvdata->gpiods[i]); 277 /* This is good to know */ 278 gpiod_set_consumer_name(drvdata->gpiods[i], drvdata->desc.name); 279 } 280 drvdata->nr_gpios = config->ngpios; 281 282 drvdata->states = devm_kmemdup(dev, 283 config->states, 284 config->nr_states * 285 sizeof(struct gpio_regulator_state), 286 GFP_KERNEL); 287 if (drvdata->states == NULL) { 288 dev_err(dev, "Failed to allocate state data\n"); 289 return -ENOMEM; 290 } 291 drvdata->nr_states = config->nr_states; 292 293 drvdata->desc.owner = THIS_MODULE; 294 drvdata->desc.enable_time = config->startup_delay; 295 296 /* handle regulator type*/ 297 switch (config->type) { 298 case REGULATOR_VOLTAGE: 299 drvdata->desc.type = REGULATOR_VOLTAGE; 300 drvdata->desc.ops = &gpio_regulator_voltage_ops; 301 drvdata->desc.n_voltages = config->nr_states; 302 break; 303 case REGULATOR_CURRENT: 304 drvdata->desc.type = REGULATOR_CURRENT; 305 drvdata->desc.ops = &gpio_regulator_current_ops; 306 break; 307 default: 308 dev_err(dev, "No regulator type set\n"); 309 return -EINVAL; 310 } 311 312 /* build initial state from gpio init data. */ 313 state = 0; 314 for (ptr = 0; ptr < drvdata->nr_gpios; ptr++) { 315 if (config->gflags[ptr] == GPIOD_OUT_HIGH) 316 state |= (1 << ptr); 317 } 318 drvdata->state = state; 319 320 cfg.dev = dev; 321 cfg.init_data = config->init_data; 322 cfg.driver_data = drvdata; 323 cfg.of_node = np; 324 325 /* 326 * The signal will be inverted by the GPIO core if flagged so in the 327 * descriptor. 328 */ 329 if (config->enabled_at_boot) 330 gflags = GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_NONEXCLUSIVE; 331 else 332 gflags = GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE; 333 334 cfg.ena_gpiod = gpiod_get_optional(dev, "enable", gflags); 335 if (IS_ERR(cfg.ena_gpiod)) 336 return PTR_ERR(cfg.ena_gpiod); 337 338 rdev = devm_regulator_register(dev, &drvdata->desc, &cfg); 339 if (IS_ERR(rdev)) { 340 ret = PTR_ERR(rdev); 341 dev_err(dev, "Failed to register regulator: %d\n", ret); 342 return ret; 343 } 344 345 platform_set_drvdata(pdev, drvdata); 346 347 return 0; 348 } 349 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org