Hi Minas, I love your patch! Perhaps something to improve: [auto build test WARNING on balbi-usb/testing/next] [also build test WARNING on usb/usb-testing peter.chen-usb/ci-for-usb-next v5.7-rc6 next-20200519] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Minas-Harutyunyan/usb-dwc2-Updat... base: https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git testing/next config: ia64-allmodconfig (attached as .config) compiler: ia64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): 371 | int dwc2_check_core_version(struct dwc2_hsotg *hsotg) | ^~~~~~~~~~~~~~~~~~~~~~~ vim +/dwc2_check_core_version +371 drivers/usb/dwc2/platform.c 364 365 /** 366 * Check core version 367 * 368 * @hsotg: Programming view of the DWC_otg controller 369 * 370 */ 372 { 373 struct dwc2_hw_params *hw = &hsotg->hw_params; 374 375 /* 376 * Attempt to ensure this device is really a DWC_otg Controller. 377 * Read and verify the GSNPSID register contents. The value should be 378 * 0x45f4xxxx, 0x5531xxxx or 0x5532xxxx 379 */ 380 381 hw->snpsid = dwc2_readl(hsotg, GSNPSID); 382 if ((hw->snpsid & GSNPSID_ID_MASK) != DWC2_OTG_ID && 383 (hw->snpsid & GSNPSID_ID_MASK) != DWC2_FS_IOT_ID && 384 (hw->snpsid & GSNPSID_ID_MASK) != DWC2_HS_IOT_ID) { 385 dev_err(hsotg->dev, "Bad value for GSNPSID: 0x%08x\n", 386 hw->snpsid); 387 return -ENODEV; 388 } 389 390 dev_dbg(hsotg->dev, "Core Release: %1x.%1x%1x%1x (snpsid=%x)\n", 391 hw->snpsid >> 12 & 0xf, hw->snpsid >> 8 & 0xf, 392 hw->snpsid >> 4 & 0xf, hw->snpsid & 0xf, hw->snpsid); 393 return 0; 394 } 395 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org