tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.10.y head: 689e89aee55c565fe90fcdf8a7e53f2f976c5946 commit: 62bb46f51f916d25c5ee7178d52baf4a80c5bf55 [4713/5262] usb: dwc2: Fix hibernation between host and device modes. config: ia64-randconfig-r004-20210519 (attached as .config) compiler: ia64-linux-gcc (GCC) 9.3.0 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://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.gi... git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git fetch --no-tags linux-stable-rc linux-5.10.y git checkout 62bb46f51f916d25c5ee7178d52baf4a80c5bf55 # 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: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from arch/ia64/include/asm/pgtable.h:154, from include/linux/pgtable.h:6, from arch/ia64/include/asm/uaccess.h:40, from include/linux/uaccess.h:11, from arch/ia64/include/asm/sections.h:11, from include/linux/interrupt.h:20, from drivers/usb/dwc2/core_intr.c:45: arch/ia64/include/asm/mmu_context.h: In function 'reload_context': arch/ia64/include/asm/mmu_context.h:137:41: warning: variable 'old_rr4' set but not used [-Wunused-but-set-variable] 137 | unsigned long rr0, rr1, rr2, rr3, rr4, old_rr4; | ^~~~~~~ drivers/usb/dwc2/core_intr.c: In function 'dwc_handle_gpwrdn_disc_det': 710 | hsotg->bus_suspended = 0; | ^~ vim +710 drivers/usb/dwc2/core_intr.c 662 663 /** 664 * dwc_handle_gpwrdn_disc_det() - Handles the gpwrdn disconnect detect. 665 * Exits hibernation without restoring registers. 666 * 667 * @hsotg: Programming view of DWC_otg controller 668 * @gpwrdn: GPWRDN register 669 */ 670 static inline void dwc_handle_gpwrdn_disc_det(struct dwc2_hsotg *hsotg, 671 u32 gpwrdn) 672 { 673 u32 gpwrdn_tmp; 674 675 /* Switch-on voltage to the core */ 676 gpwrdn_tmp = dwc2_readl(hsotg, GPWRDN); 677 gpwrdn_tmp &= ~GPWRDN_PWRDNSWTCH; 678 dwc2_writel(hsotg, gpwrdn_tmp, GPWRDN); 679 udelay(5); 680 681 /* Reset core */ 682 gpwrdn_tmp = dwc2_readl(hsotg, GPWRDN); 683 gpwrdn_tmp &= ~GPWRDN_PWRDNRSTN; 684 dwc2_writel(hsotg, gpwrdn_tmp, GPWRDN); 685 udelay(5); 686 687 /* Disable Power Down Clamp */ 688 gpwrdn_tmp = dwc2_readl(hsotg, GPWRDN); 689 gpwrdn_tmp &= ~GPWRDN_PWRDNCLMP; 690 dwc2_writel(hsotg, gpwrdn_tmp, GPWRDN); 691 udelay(5); 692 693 /* Deassert reset core */ 694 gpwrdn_tmp = dwc2_readl(hsotg, GPWRDN); 695 gpwrdn_tmp |= GPWRDN_PWRDNRSTN; 696 dwc2_writel(hsotg, gpwrdn_tmp, GPWRDN); 697 udelay(5); 698 699 /* Disable PMU interrupt */ 700 gpwrdn_tmp = dwc2_readl(hsotg, GPWRDN); 701 gpwrdn_tmp &= ~GPWRDN_PMUINTSEL; 702 dwc2_writel(hsotg, gpwrdn_tmp, GPWRDN); 703 704 /* De-assert Wakeup Logic */ 705 gpwrdn_tmp = dwc2_readl(hsotg, GPWRDN); 706 gpwrdn_tmp &= ~GPWRDN_PMUACTV; 707 dwc2_writel(hsotg, gpwrdn_tmp, GPWRDN); 708 709 hsotg->hibernated = 0; 711 712 if (gpwrdn & GPWRDN_IDSTS) { 713 hsotg->op_state = OTG_STATE_B_PERIPHERAL; 714 dwc2_core_init(hsotg, false); 715 dwc2_enable_global_interrupts(hsotg); 716 dwc2_hsotg_core_init_disconnected(hsotg, false); 717 dwc2_hsotg_core_connect(hsotg); 718 } else { 719 hsotg->op_state = OTG_STATE_A_HOST; 720 721 /* Initialize the Core for Host mode */ 722 dwc2_core_init(hsotg, false); 723 dwc2_enable_global_interrupts(hsotg); 724 dwc2_hcd_start(hsotg); 725 } 726 } 727 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org