Hi Stefan, kernel test robot noticed the following build warnings:
[auto build test WARNING on linus/master] [also build test WARNING on arm/for-next arm/fixes v6.11-rc4 next-20240822] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Stefan-Wahren/mailbox-bcm2835-Fix-timeout-during-suspend-mode/20240822-063725 base: linus/master patch link: https://lore.kernel.org/r/20240821214052.6800-8-wahrenst%40gmx.net patch subject: [PATCH V3 7/9] usb: dwc2: Refactor backup/restore of registers config: x86_64-randconfig-161-20240822 (https://download.01.org/0day-ci/archive/20240822/202408221629.jv9agcrf-...@intel.com/config) compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240822/202408221629.jv9agcrf-...@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <l...@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202408221629.jv9agcrf-...@intel.com/ All warnings (new ones prefixed by >>): >> drivers/usb/dwc2/gadget.c:5605:28: warning: variable 'dr' set but not used >> [-Wunused-but-set-variable] 5605 | struct dwc2_dregs_backup *dr; | ^ 1 warning generated. vim +/dr +5605 drivers/usb/dwc2/gadget.c be2b960e57154a Artur Petrosyan 2021-04-08 5588 be2b960e57154a Artur Petrosyan 2021-04-08 5589 /* be2b960e57154a Artur Petrosyan 2021-04-08 5590 * dwc2_gadget_exit_partial_power_down() - Exit controller from device partial be2b960e57154a Artur Petrosyan 2021-04-08 5591 * power down. be2b960e57154a Artur Petrosyan 2021-04-08 5592 * be2b960e57154a Artur Petrosyan 2021-04-08 5593 * @hsotg: Programming view of the DWC_otg controller be2b960e57154a Artur Petrosyan 2021-04-08 5594 * @restore: indicates whether need to restore the registers or not. be2b960e57154a Artur Petrosyan 2021-04-08 5595 * be2b960e57154a Artur Petrosyan 2021-04-08 5596 * Return: non-zero if failed to exit device partial power down. be2b960e57154a Artur Petrosyan 2021-04-08 5597 * be2b960e57154a Artur Petrosyan 2021-04-08 5598 * This function is for exiting from device mode partial power down. be2b960e57154a Artur Petrosyan 2021-04-08 5599 */ be2b960e57154a Artur Petrosyan 2021-04-08 5600 int dwc2_gadget_exit_partial_power_down(struct dwc2_hsotg *hsotg, be2b960e57154a Artur Petrosyan 2021-04-08 5601 bool restore) be2b960e57154a Artur Petrosyan 2021-04-08 5602 { be2b960e57154a Artur Petrosyan 2021-04-08 5603 u32 pcgcctl; be2b960e57154a Artur Petrosyan 2021-04-08 5604 u32 dctl; be2b960e57154a Artur Petrosyan 2021-04-08 @5605 struct dwc2_dregs_backup *dr; be2b960e57154a Artur Petrosyan 2021-04-08 5606 int ret = 0; be2b960e57154a Artur Petrosyan 2021-04-08 5607 be2b960e57154a Artur Petrosyan 2021-04-08 5608 dr = &hsotg->dr_backup; be2b960e57154a Artur Petrosyan 2021-04-08 5609 be2b960e57154a Artur Petrosyan 2021-04-08 5610 dev_dbg(hsotg->dev, "Exiting device partial Power Down started.\n"); be2b960e57154a Artur Petrosyan 2021-04-08 5611 be2b960e57154a Artur Petrosyan 2021-04-08 5612 pcgcctl = dwc2_readl(hsotg, PCGCTL); be2b960e57154a Artur Petrosyan 2021-04-08 5613 pcgcctl &= ~PCGCTL_STOPPCLK; be2b960e57154a Artur Petrosyan 2021-04-08 5614 dwc2_writel(hsotg, pcgcctl, PCGCTL); be2b960e57154a Artur Petrosyan 2021-04-08 5615 be2b960e57154a Artur Petrosyan 2021-04-08 5616 pcgcctl = dwc2_readl(hsotg, PCGCTL); be2b960e57154a Artur Petrosyan 2021-04-08 5617 pcgcctl &= ~PCGCTL_PWRCLMP; be2b960e57154a Artur Petrosyan 2021-04-08 5618 dwc2_writel(hsotg, pcgcctl, PCGCTL); be2b960e57154a Artur Petrosyan 2021-04-08 5619 be2b960e57154a Artur Petrosyan 2021-04-08 5620 pcgcctl = dwc2_readl(hsotg, PCGCTL); be2b960e57154a Artur Petrosyan 2021-04-08 5621 pcgcctl &= ~PCGCTL_RSTPDWNMODULE; be2b960e57154a Artur Petrosyan 2021-04-08 5622 dwc2_writel(hsotg, pcgcctl, PCGCTL); be2b960e57154a Artur Petrosyan 2021-04-08 5623 be2b960e57154a Artur Petrosyan 2021-04-08 5624 udelay(100); be2b960e57154a Artur Petrosyan 2021-04-08 5625 if (restore) { 78c09c66698a77 Stefan Wahren 2024-08-21 5626 ret = dwc2_gadget_restore_critical_registers(hsotg); 78c09c66698a77 Stefan Wahren 2024-08-21 5627 if (ret) be2b960e57154a Artur Petrosyan 2021-04-08 5628 return ret; be2b960e57154a Artur Petrosyan 2021-04-08 5629 } be2b960e57154a Artur Petrosyan 2021-04-08 5630 be2b960e57154a Artur Petrosyan 2021-04-08 5631 /* Set the Power-On Programming done bit */ be2b960e57154a Artur Petrosyan 2021-04-08 5632 dctl = dwc2_readl(hsotg, DCTL); be2b960e57154a Artur Petrosyan 2021-04-08 5633 dctl |= DCTL_PWRONPRGDONE; be2b960e57154a Artur Petrosyan 2021-04-08 5634 dwc2_writel(hsotg, dctl, DCTL); be2b960e57154a Artur Petrosyan 2021-04-08 5635 be2b960e57154a Artur Petrosyan 2021-04-08 5636 /* Set in_ppd flag to 0 as here core exits from suspend. */ be2b960e57154a Artur Petrosyan 2021-04-08 5637 hsotg->in_ppd = 0; be2b960e57154a Artur Petrosyan 2021-04-08 5638 hsotg->lx_state = DWC2_L0; be2b960e57154a Artur Petrosyan 2021-04-08 5639 be2b960e57154a Artur Petrosyan 2021-04-08 5640 dev_dbg(hsotg->dev, "Exiting device partial Power Down completed.\n"); be2b960e57154a Artur Petrosyan 2021-04-08 5641 return ret; be2b960e57154a Artur Petrosyan 2021-04-08 5642 } 012466fc8ccc01 Artur Petrosyan 2021-04-13 5643 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
