[kbuild-all] [xlnx:xlnx_rebase_v5.4 913/1697] drivers/usb/dwc3/core.c:977:5: warning: no previous prototype for 'dwc3_core_init'

tree: https://github.com/Xilinx/linux-xlnx xlnx_rebase_v5.4 head: 629150468791671b5fde21363e643e87c5815b17 commit: 526f56822f971265d67428fe61e40fe18f95ac81 [913/1697] usb: dwc3: Add hibernation support when operating as gadget config: m68k-randconfig-r013-20210112 (attached as .config) compiler: m68k-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://github.com/Xilinx/linux-xlnx/commit/526f56822f971265d67428fe61e40... git remote add xlnx https://github.com/Xilinx/linux-xlnx git fetch --no-tags xlnx xlnx_rebase_v5.4 git checkout 526f56822f971265d67428fe61e40fe18f95ac81 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=m68k If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from include/linux/err.h:5, from include/linux/clk.h:12, from drivers/usb/dwc3/core.c:11: include/linux/scatterlist.h: In function 'sg_set_buf': arch/m68k/include/asm/page_no.h:33:50: warning: ordered comparison of pointer with null pointer [-Wextra] 33 | #define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \ | ^~ include/linux/compiler.h:78:42: note: in definition of macro 'unlikely' 78 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ include/linux/scatterlist.h:143:2: note: in expansion of macro 'BUG_ON' 143 | BUG_ON(!virt_addr_valid(buf)); | ^~~~~~ include/linux/scatterlist.h:143:10: note: in expansion of macro 'virt_addr_valid' 143 | BUG_ON(!virt_addr_valid(buf)); | ^~~~~~~~~~~~~~~ In file included from drivers/usb/dwc3/core.c:36: drivers/usb/dwc3/core.h: At top level: drivers/usb/dwc3/core.h:1444:6: warning: no previous prototype for 'dwc3_simple_wakeup_capable' [-Wmissing-prototypes] 1444 | void dwc3_simple_wakeup_capable(struct device *dev, bool wakeup) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/usb/dwc3/core.h:1446:6: warning: no previous prototype for 'dwc3_set_simple_data' [-Wmissing-prototypes] 1446 | void dwc3_set_simple_data(struct dwc3 *dwc) | ^~~~~~~~~~~~~~~~~~~~ drivers/usb/dwc3/core.h:1448:6: warning: no previous prototype for 'dwc3_simple_check_quirks' [-Wmissing-prototypes] 1448 | void dwc3_simple_check_quirks(struct dwc3 *dwc) | ^~~~~~~~~~~~~~~~~~~~~~~~ drivers/usb/dwc3/core.h:1450:5: warning: no previous prototype for 'dwc3_set_usb_core_power' [-Wmissing-prototypes] 1450 | int dwc3_set_usb_core_power(struct dwc3 *dwc, bool on) | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/usb/dwc3/core.c:386:6: warning: no previous prototype for 'dwc3_free_event_buffers' [-Wmissing-prototypes] 386 | void dwc3_free_event_buffers(struct dwc3 *dwc) | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/usb/dwc3/core.c:403:5: warning: no previous prototype for 'dwc3_alloc_event_buffers' [-Wmissing-prototypes] 403 | int dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length) | ^~~~~~~~~~~~~~~~~~~~~~~~ 977 | int dwc3_core_init(struct dwc3 *dwc) | ^~~~~~~~~~~~~~ In file included from drivers/usb/dwc3/core.c:36: drivers/usb/dwc3/core.h: In function 'dwc3_set_usb_core_power': drivers/usb/dwc3/core.h:1451:1: warning: control reaches end of non-void function [-Wreturn-type] 1451 | { ; } | ^ vim +/dwc3_core_init +977 drivers/usb/dwc3/core.c 970 971 /** 972 * dwc3_core_init - Low-level initialization of DWC3 Core 973 * @dwc: Pointer to our controller context structure 974 * 975 * Returns 0 on success otherwise negative errno. 976 */ 978 { 979 u32 reg; 980 int ret; 981 982 /* 983 * Write Linux Version Code to our GUID register so it's easy to figure 984 * out which kernel version a bug was found. 985 */ 986 dwc3_writel(dwc->regs, DWC3_GUID, LINUX_VERSION_CODE); 987 988 /* Handle USB2.0-only core configuration */ 989 if (DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) == 990 DWC3_GHWPARAMS3_SSPHY_IFC_DIS) { 991 if (dwc->maximum_speed == USB_SPEED_SUPER) 992 dwc->maximum_speed = USB_SPEED_HIGH; 993 } 994 995 ret = dwc3_phy_setup(dwc); 996 if (ret) 997 goto err0; 998 999 if (!dwc->ulpi_ready) { 1000 ret = dwc3_core_ulpi_init(dwc); 1001 if (ret) 1002 goto err0; 1003 dwc->ulpi_ready = true; 1004 } 1005 1006 if (!dwc->phys_ready) { 1007 ret = dwc3_core_get_phy(dwc); 1008 if (ret) 1009 goto err0a; 1010 dwc->phys_ready = true; 1011 } 1012 1013 ret = dwc3_core_soft_reset(dwc); 1014 if (ret) 1015 goto err0a; 1016 1017 dwc3_core_setup_global_control(dwc); 1018 dwc3_core_num_eps(dwc); 1019 1020 if (dwc->scratchbuf == NULL) { 1021 ret = dwc3_alloc_scratch_buffers(dwc); 1022 if (ret) { 1023 dev_err(dwc->dev, 1024 "Not enough memory for scratch buffers\n"); 1025 goto err1; 1026 } 1027 } 1028 1029 ret = dwc3_setup_scratch_buffers(dwc); 1030 if (ret) { 1031 dev_err(dwc->dev, "Failed to setup scratch buffers: %d\n", ret); 1032 goto err1; 1033 } 1034 1035 /* Adjust Frame Length */ 1036 dwc3_frame_length_adjustment(dwc); 1037 1038 dwc3_set_incr_burst_type(dwc); 1039 1040 ret = dwc3_config_soc_bus(dwc); 1041 if (ret) 1042 goto err1; 1043 1044 usb_phy_set_suspend(dwc->usb2_phy, 0); 1045 usb_phy_set_suspend(dwc->usb3_phy, 0); 1046 ret = phy_power_on(dwc->usb2_generic_phy); 1047 if (ret < 0) 1048 goto err2; 1049 1050 ret = phy_power_on(dwc->usb3_generic_phy); 1051 if (ret < 0) 1052 goto err3; 1053 1054 ret = dwc3_event_buffers_setup(dwc); 1055 if (ret) { 1056 dev_err(dwc->dev, "failed to setup event buffers\n"); 1057 goto err4; 1058 } 1059 1060 /* 1061 * ENDXFER polling is available on version 3.10a and later of 1062 * the DWC_usb3 controller. It is NOT available in the 1063 * DWC_usb31 controller. 1064 */ 1065 if (!dwc3_is_usb31(dwc) && dwc->revision >= DWC3_REVISION_310A) { 1066 reg = dwc3_readl(dwc->regs, DWC3_GUCTL2); 1067 reg |= DWC3_GUCTL2_RST_ACTBITLATER; 1068 dwc3_writel(dwc->regs, DWC3_GUCTL2, reg); 1069 } 1070 1071 /* When configured in HOST mode, after issuing U3/L2 exit controller 1072 * fails to send proper CRC checksum in CRC5 feild. Because of this 1073 * behaviour Transaction Error is generated, resulting in reset and 1074 * re-enumeration of usb device attached. Enabling bit 10 of GUCTL1 1075 * will correct this problem 1076 */ 1077 if (dwc->enable_guctl1_resume_quirk) { 1078 reg = dwc3_readl(dwc->regs, DWC3_GUCTL1); 1079 reg |= DWC3_GUCTL1_RESUME_QUIRK; 1080 dwc3_writel(dwc->regs, DWC3_GUCTL1, reg); 1081 } 1082 1083 /* SNPS controller when configureed in HOST mode maintains Inter Packet 1084 * Delay (IPD) of ~380ns which works with most of the super-speed hubs 1085 * except VIA-LAB hubs. When IPD is ~380ns HOST controller fails to 1086 * enumerate FS/LS devices when connected behind VIA-LAB hubs. 1087 * Enabling bit 9 of GUCTL1 enables the workaround in HW to reduce the 1088 * ULPI clock latency by 1 cycle, thus reducing the IPD (~360ns) and 1089 * making controller enumerate FS/LS devices connected behind VIA-LAB. 1090 */ 1091 if (dwc->enable_guctl1_ipd_quirk) { 1092 reg = dwc3_readl(dwc->regs, DWC3_GUCTL1); 1093 reg |= DWC3_GUCTL1_IPD_QUIRK; 1094 dwc3_writel(dwc->regs, DWC3_GUCTL1, reg); 1095 } 1096 1097 if (dwc->revision >= DWC3_REVISION_250A) { 1098 reg = dwc3_readl(dwc->regs, DWC3_GUCTL1); 1099 1100 /* 1101 * Enable hardware control of sending remote wakeup 1102 * in HS when the device is in the L1 state. 1103 */ 1104 if (dwc->revision >= DWC3_REVISION_290A) 1105 reg |= DWC3_GUCTL1_DEV_L1_EXIT_BY_HW; 1106 1107 if (dwc->dis_tx_ipgap_linecheck_quirk) 1108 reg |= DWC3_GUCTL1_TX_IPGAP_LINECHECK_DIS; 1109 1110 dwc3_writel(dwc->regs, DWC3_GUCTL1, reg); 1111 } 1112 1113 if (dwc->dr_mode == USB_DR_MODE_HOST || 1114 dwc->dr_mode == USB_DR_MODE_OTG) { 1115 reg = dwc3_readl(dwc->regs, DWC3_GUCTL); 1116 1117 /* 1118 * Enable Auto retry Feature to make the controller operating in 1119 * Host mode on seeing transaction errors(CRC errors or internal 1120 * overrun scenerios) on IN transfers to reply to the device 1121 * with a non-terminating retry ACK (i.e, an ACK transcation 1122 * packet with Retry=1 & Nump != 0) 1123 */ 1124 reg |= DWC3_GUCTL_HSTINAUTORETRY; 1125 1126 dwc3_writel(dwc->regs, DWC3_GUCTL, reg); 1127 } 1128 1129 /* 1130 * Must config both number of packets and max burst settings to enable 1131 * RX and/or TX threshold. 1132 */ 1133 if (dwc3_is_usb31(dwc) && dwc->dr_mode == USB_DR_MODE_HOST) { 1134 u8 rx_thr_num = dwc->rx_thr_num_pkt_prd; 1135 u8 rx_maxburst = dwc->rx_max_burst_prd; 1136 u8 tx_thr_num = dwc->tx_thr_num_pkt_prd; 1137 u8 tx_maxburst = dwc->tx_max_burst_prd; 1138 1139 if (rx_thr_num && rx_maxburst) { 1140 reg = dwc3_readl(dwc->regs, DWC3_GRXTHRCFG); 1141 reg |= DWC31_RXTHRNUMPKTSEL_PRD; 1142 1143 reg &= ~DWC31_RXTHRNUMPKT_PRD(~0); 1144 reg |= DWC31_RXTHRNUMPKT_PRD(rx_thr_num); 1145 1146 reg &= ~DWC31_MAXRXBURSTSIZE_PRD(~0); 1147 reg |= DWC31_MAXRXBURSTSIZE_PRD(rx_maxburst); 1148 1149 dwc3_writel(dwc->regs, DWC3_GRXTHRCFG, reg); 1150 } 1151 1152 if (tx_thr_num && tx_maxburst) { 1153 reg = dwc3_readl(dwc->regs, DWC3_GTXTHRCFG); 1154 reg |= DWC31_TXTHRNUMPKTSEL_PRD; 1155 1156 reg &= ~DWC31_TXTHRNUMPKT_PRD(~0); 1157 reg |= DWC31_TXTHRNUMPKT_PRD(tx_thr_num); 1158 1159 reg &= ~DWC31_MAXTXBURSTSIZE_PRD(~0); 1160 reg |= DWC31_MAXTXBURSTSIZE_PRD(tx_maxburst); 1161 1162 dwc3_writel(dwc->regs, DWC3_GTXTHRCFG, reg); 1163 } 1164 } 1165 1166 return 0; 1167 1168 err4: 1169 phy_power_off(dwc->usb3_generic_phy); 1170 1171 err3: 1172 phy_power_off(dwc->usb2_generic_phy); 1173 1174 err2: 1175 usb_phy_set_suspend(dwc->usb2_phy, 1); 1176 usb_phy_set_suspend(dwc->usb3_phy, 1); 1177 1178 err1: 1179 usb_phy_shutdown(dwc->usb2_phy); 1180 usb_phy_shutdown(dwc->usb3_phy); 1181 phy_exit(dwc->usb2_generic_phy); 1182 phy_exit(dwc->usb3_generic_phy); 1183 1184 err0a: 1185 dwc3_ulpi_exit(dwc); 1186 1187 err0: 1188 return ret; 1189 } 1190 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org