Hi Michael, kernel test robot noticed the following build warnings: [auto build test WARNING on dd5a440a31fae6e459c0d6271dddd62825505361] url: https://github.com/intel-lab-lkp/linux/commits/Michael-Grzeschik/usb-dwc3-gadget-create-per-ep-interrupts/20240507-070804 base: dd5a440a31fae6e459c0d6271dddd62825505361 patch link: https://lore.kernel.org/r/20240507-dwc3_per_ep_irqthread-v1-1-f14dec6de19f%40pengutronix.de patch subject: [PATCH] usb: dwc3: gadget: create per ep interrupts config: x86_64-buildonly-randconfig-001-20240507 (https://download.01.org/0day-ci/archive/20240507/202405071800.omy5Ou1D-lkp@xxxxxxxxx/config) compiler: clang version 18.1.4 (https://github.com/llvm/llvm-project e6c3289804a67ea0bb6a86fadbe454dd93b8d855) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240507/202405071800.omy5Ou1D-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/202405071800.omy5Ou1D-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/usb/dwc3/gadget.c:1068:6: warning: variable 'count_processed' set but not used [-Wunused-but-set-variable] 1068 | int count_processed = 0; | ^ 1 warning generated. vim +/count_processed +1068 drivers/usb/dwc3/gadget.c 1059 1060 static void dwc3_process_event_entry(struct dwc3 *dwc, 1061 const union dwc3_event *event); 1062 1063 static irqreturn_t dwc3_endpoint_thread_irq(int irq, void *_dep) 1064 { 1065 struct dwc3_ep *dep = _dep; 1066 struct dwc3 *dwc = dep->dwc; 1067 const union dwc3_event *event; > 1068 int count_processed = 0; 1069 u32 event_raw; 1070 unsigned long flags; 1071 1072 dep->givebacks_current_turn = 0; 1073 1074 spin_lock_irqsave(&dep->event_lock, flags); 1075 1076 if (dep->ep_event_flags & DWC3_EP_EVENT_OVERFLOW) { 1077 dev_err(dwc->dev, "ep%d: event buffer overflow\n", dep->number); 1078 dep->ep_event_flags &= ~DWC3_EP_EVENT_OVERFLOW; 1079 } 1080 1081 while (dep->ep_event_r_index != dep->ep_event_w_index) { 1082 1083 event_raw = dep->ep_event_buffer[dep->ep_event_r_index]; 1084 1085 /* 1086 * we have a copy of the event, so we can release the lock 1087 */ 1088 spin_unlock_irqrestore(&dep->event_lock, flags); 1089 1090 event = (const union dwc3_event *) &event_raw; 1091 1092 spin_lock(&dwc->lock); 1093 dwc3_process_event_entry(dwc, event); 1094 spin_unlock(&dwc->lock); 1095 1096 /* 1097 * we need to re-acquire the lock to update the read index 1098 */ 1099 spin_lock_irqsave(&dep->event_lock, flags); 1100 1101 dep->ep_event_r_index = (dep->ep_event_r_index + 1) % 1102 ARRAY_SIZE(dep->ep_event_buffer); 1103 1104 count_processed += 1; 1105 } 1106 1107 spin_unlock_irqrestore(&dep->event_lock, flags); 1108 1109 return IRQ_HANDLED; 1110 } 1111 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
