Hi Artur, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on usb/usb-testing] [also build test WARNING on next-20210414] [cannot apply to peter.chen-usb/for-usb-next linus/master balbi-usb/testing/next v5.12-rc7] [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/Artur-Petrosyan/usb-dwc2-Update-exit-hibernation-when-port-reset-is-asserted/20210415-144021 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing config: x86_64-randconfig-a014-20210415 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 6a18cc23efad410db48a3ccfc233d215de7d4cb9) 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://github.com/0day-ci/linux/commit/8e4dbc0200040af9c752aca4090cd41572e6fb86 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Artur-Petrosyan/usb-dwc2-Update-exit-hibernation-when-port-reset-is-asserted/20210415-144021 git checkout 8e4dbc0200040af9c752aca4090cd41572e6fb86 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/usb/dwc2/platform.c:324:7: warning: variable 'gr' is uninitialized when used here [-Wuninitialized] if (gr->gotgctl & GOTGCTL_CURMODE_HOST) { ^~ drivers/usb/dwc2/platform.c:319:30: note: initialize the variable 'gr' to silence this warning struct dwc2_gregs_backup *gr; ^ = NULL 1 warning generated. vim +/gr +324 drivers/usb/dwc2/platform.c 304 305 /** 306 * dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the 307 * DWC_otg driver 308 * 309 * @dev: Platform device 310 * 311 * This routine is called, for example, when the rmmod command is executed. The 312 * device may or may not be electrically present. If it is present, the driver 313 * stops device processing. Any resources used on behalf of this device are 314 * freed. 315 */ 316 static int dwc2_driver_remove(struct platform_device *dev) 317 { 318 struct dwc2_hsotg *hsotg = platform_get_drvdata(dev); 319 struct dwc2_gregs_backup *gr; 320 int ret = 0; 321 322 /* Exit Hibernation when driver is removed. */ 323 if (hsotg->hibernated) { > 324 if (gr->gotgctl & GOTGCTL_CURMODE_HOST) { 325 ret = dwc2_exit_hibernation(hsotg, 0, 0, 1); 326 if (ret) 327 dev_err(hsotg->dev, 328 "exit hibernation failed.\n"); 329 } else { 330 ret = dwc2_exit_hibernation(hsotg, 0, 0, 0); 331 if (ret) 332 dev_err(hsotg->dev, 333 "exit hibernation failed.\n"); 334 } 335 } 336 337 /* Exit Partial Power Down when driver is removed. */ 338 if (hsotg->in_ppd) { 339 ret = dwc2_exit_partial_power_down(hsotg, 0, true); 340 if (ret) 341 dev_err(hsotg->dev, 342 "exit partial_power_down failed\n"); 343 } 344 345 /* Exit clock gating when driver is removed. */ 346 if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_NONE && 347 hsotg->bus_suspended) { 348 if (dwc2_is_device_mode(hsotg)) 349 dwc2_gadget_exit_clock_gating(hsotg, 0); 350 else 351 dwc2_host_exit_clock_gating(hsotg, 0); 352 } 353 354 dwc2_debugfs_exit(hsotg); 355 if (hsotg->hcd_enabled) 356 dwc2_hcd_remove(hsotg); 357 if (hsotg->gadget_enabled) 358 dwc2_hsotg_remove(hsotg); 359 360 dwc2_drd_exit(hsotg); 361 362 if (hsotg->params.activate_stm_id_vb_detection) 363 regulator_disable(hsotg->usb33d); 364 365 if (hsotg->ll_hw_enabled) 366 dwc2_lowlevel_hw_disable(hsotg); 367 368 reset_control_assert(hsotg->reset); 369 reset_control_assert(hsotg->reset_ecc); 370 371 return ret; 372 } 373 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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