Hi raoxu, kernel test robot noticed the following build warnings: [auto build test WARNING on usb/usb-testing] [also build test WARNING on usb/usb-next usb/usb-linus linus/master v6.14-rc5 next-20250305] [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/raoxu/usb-xhci-Add-debugfs-support-for-xHCI-port-bandwidth/20250305-165606 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing patch link: https://lore.kernel.org/r/20250305085118.28826-1-raoxu%40uniontech.com patch subject: [PATCH V3] usb: xhci: Add debugfs support for xHCI port bandwidth config: arc-randconfig-002-20250306 (https://download.01.org/0day-ci/archive/20250306/202503061205.wtVpmjvj-lkp@xxxxxxxxx/config) compiler: arceb-elf-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250306/202503061205.wtVpmjvj-lkp@xxxxxxxxx/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 <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202503061205.wtVpmjvj-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): drivers/usb/host/xhci.c: In function 'xhci_get_port_bandwidth': >> drivers/usb/host/xhci.c:3094:41: warning: variable 'num_ports' set but not used [-Wunused-but-set-variable] 3094 | unsigned int num_ports; | ^~~~~~~~~ vim +/num_ports +3094 drivers/usb/host/xhci.c 3090 3091 /* Get the available bandwidth of the ports under the xhci roothub */ 3092 int xhci_get_port_bandwidth(struct xhci_hcd *xhci, u8 dev_speed) 3093 { > 3094 unsigned int num_ports; 3095 int ret; 3096 unsigned long flags; 3097 struct xhci_container_ctx *ctx; 3098 3099 num_ports = HCS_MAX_PORTS(xhci->hcs_params1); 3100 ctx = xhci->get_bw_command->in_ctx; 3101 3102 /* get xhci hub port bandwidth */ 3103 /* refer to xhci rev1_2 protocol 4.6.15*/ 3104 spin_lock_irqsave(&xhci->lock, flags); 3105 ret = xhci_queue_get_rh_port_bw(xhci, xhci->get_bw_command, ctx->dma, 3106 dev_speed, 0, false); 3107 if (ret < 0) { 3108 spin_unlock_irqrestore(&xhci->lock, flags); 3109 return ret; 3110 } 3111 xhci_ring_cmd_db(xhci); 3112 spin_unlock_irqrestore(&xhci->lock, flags); 3113 3114 wait_for_completion(xhci->get_bw_command->completion); 3115 3116 return ret; 3117 } 3118 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
