Hi Fugang, First bad commit (maybe != root cause): tree: https://github.com/Freescale/linux-fslc 5.4-2.3.x-imx head: ef8eb7d4787bee4be718a83b6c73fb8cc7e8f158 commit: f186a4e65f54a28973c743f8c007b18c1ce95be6 [14893/19343] MLK-24962 net: wireless: nxp: mxm_wifiex: upgrade to mxm5x16203 release config: sh-allmodconfig (attached as .config) compiler: sh4-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/Freescale/linux-fslc/commit/f186a4e65f54a28973c743f8c0... git remote add freescale-fslc https://github.com/Freescale/linux-fslc git fetch --no-tags freescale-fslc 5.4-2.3.x-imx git checkout f186a4e65f54a28973c743f8c007b18c1ce95be6 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sh 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 drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c:31: drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.h:133:20: error: array type has incomplete element type 'struct msix_entry' 133 | struct msix_entry msix_entries[PCIE_NUM_MSIX_VECTORS]; | ^~~~~~~~~~~~ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c:394:5: warning: no previous prototype for 'woal_pcie_probe' [-Wmissing-prototypes] 394 | int woal_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id) | ^~~~~~~~~~~~~~~ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c: In function 'woal_pcie_probe': drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c:441:6: error: implicit declaration of function 'pci_is_enabled'; did you mean 'pci_acs_enabled'? [-Werror=implicit-function-declaration] 441 | if (pci_is_enabled(pdev)) | ^~~~~~~~~~~~~~ | pci_acs_enabled drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c: At top level: drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c:896:13: warning: no previous prototype for 'woal_pcie_write_data_sync' [-Wmissing-prototypes] 896 | mlan_status woal_pcie_write_data_sync(moal_handle *handle, mlan_buffer *pmbuf, | ^~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c:912:13: warning: no previous prototype for 'woal_pcie_read_data_sync' [-Wmissing-prototypes] 912 | mlan_status woal_pcie_read_data_sync(moal_handle *handle, mlan_buffer *pmbuf, | ^~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c: In function 'woal_pcie_init': drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c:1089:8: error: implicit declaration of function 'pci_request_region'; did you mean 'pci_request_regions'? [-Werror=implicit-function-declaration] 1089 | ret = pci_request_region(pdev, 0, DRV_NAME); | ^~~~~~~~~~~~~~~~~~ | pci_request_regions 1094 | card->pci_mmap = pci_iomap(pdev, 0, 0); | ^~~~~~~~~ | pcim_iomap drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c:1094:17: warning: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Wint-conversion] 1094 | card->pci_mmap = pci_iomap(pdev, 0, 0); | ^ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c:1104:18: warning: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Wint-conversion] 1104 | card->pci_mmap1 = pci_iomap(pdev, 2, 0); | ^ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c:1118:2: error: implicit declaration of function 'pci_release_region'; did you mean 'pci_release_regions'? [-Werror=implicit-function-declaration] 1118 | pci_release_region(pdev, 2); | ^~~~~~~~~~~~~~~~~~ | pci_release_regions 1120 | pci_iounmap(pdev, card->pci_mmap); | ^~~~~~~~~~~ | pcim_iounmap drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c: In function 'woal_pcie_register_dev': drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c:1174:9: error: implicit declaration of function 'pci_enable_msix_exact' [-Werror=implicit-function-declaration] 1174 | ret = pci_enable_msix_exact(pdev, card->msix_entries, nvec); | ^~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c:1197:6: error: implicit declaration of function 'pci_disable_msix'; did you mean 'pci_disable_sriov'? [-Werror=implicit-function-declaration] 1197 | pci_disable_msix(pdev); | ^~~~~~~~~~~~~~~~ | pci_disable_sriov drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c:1209:9: error: implicit declaration of function 'pci_enable_msi'; did you mean 'pci_enable_ats'? [-Werror=implicit-function-declaration] 1209 | ret = pci_enable_msi(pdev); | ^~~~~~~~~~~~~~ | pci_enable_ats drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c:1216:5: error: implicit declaration of function 'pci_disable_msi'; did you mean 'pci_disable_ats'? [-Werror=implicit-function-declaration] 1216 | pci_disable_msi(pdev); | ^~~~~~~~~~~~~~~ | pci_disable_ats drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c: At top level: drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c:1418:5: warning: no previous prototype for 'woal_pcie_dump_reg_info' [-Wmissing-prototypes] 1418 | int woal_pcie_dump_reg_info(moal_handle *phandle, t_u8 *buffer) | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c:1752:13: warning: no previous prototype for 'woal_read_reg_eight_bit' [-Wmissing-prototypes] 1752 | mlan_status woal_read_reg_eight_bit(moal_handle *handle, t_u32 reg, t_u8 *data) | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c:1767:13: warning: no previous prototype for 'woal_pcie_rdwr_firmware' [-Wmissing-prototypes] 1767 | rdwr_status woal_pcie_rdwr_firmware(moal_handle *phandle, t_u8 doneflag) | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c:2013:6: warning: no previous prototype for 'woal_pcie_dump_fw_info_v2' [-Wmissing-prototypes] 2013 | void woal_pcie_dump_fw_info_v2(moal_handle *phandle) | ^~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c:2192:6: warning: no previous prototype for 'woal_pcie_dump_fw_info' [-Wmissing-prototypes] 2192 | void woal_pcie_dump_fw_info(moal_handle *phandle) | ^~~~~~~~~~~~~~~~~~~~~~ In file included from drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_main.h:130, from drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.h:62, from drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c:31: drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_priv.h:282:34: warning: 'woal_private_args' defined but not used [-Wunused-const-variable=] 282 | static const struct iw_priv_args woal_private_args[] = { | ^~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +1094 drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c 688b67b2c7220b Fugang Duan 2020-04-19 1088 688b67b2c7220b Fugang Duan 2020-04-19 1089 ret = pci_request_region(pdev, 0, DRV_NAME); 688b67b2c7220b Fugang Duan 2020-04-19 1090 if (ret) { 688b67b2c7220b Fugang Duan 2020-04-19 1091 PRINTM(MERROR, "req_reg(0) error\n"); 688b67b2c7220b Fugang Duan 2020-04-19 1092 goto err_req_region0; 688b67b2c7220b Fugang Duan 2020-04-19 1093 } 688b67b2c7220b Fugang Duan 2020-04-19 @1094 card->pci_mmap = pci_iomap(pdev, 0, 0); 688b67b2c7220b Fugang Duan 2020-04-19 1095 if (!card->pci_mmap) { 688b67b2c7220b Fugang Duan 2020-04-19 1096 PRINTM(MERROR, "iomap(0) error\n"); 688b67b2c7220b Fugang Duan 2020-04-19 1097 goto err_iomap0; 688b67b2c7220b Fugang Duan 2020-04-19 1098 } 688b67b2c7220b Fugang Duan 2020-04-19 1099 ret = pci_request_region(pdev, 2, DRV_NAME); 688b67b2c7220b Fugang Duan 2020-04-19 1100 if (ret) { 688b67b2c7220b Fugang Duan 2020-04-19 1101 PRINTM(MERROR, "req_reg(2) error\n"); 688b67b2c7220b Fugang Duan 2020-04-19 1102 goto err_req_region2; 688b67b2c7220b Fugang Duan 2020-04-19 1103 } 688b67b2c7220b Fugang Duan 2020-04-19 1104 card->pci_mmap1 = pci_iomap(pdev, 2, 0); 688b67b2c7220b Fugang Duan 2020-04-19 1105 if (!card->pci_mmap1) { 688b67b2c7220b Fugang Duan 2020-04-19 1106 PRINTM(MERROR, "iomap(2) error\n"); 688b67b2c7220b Fugang Duan 2020-04-19 1107 goto err_iomap2; 688b67b2c7220b Fugang Duan 2020-04-19 1108 } 688b67b2c7220b Fugang Duan 2020-04-19 1109 6b4a83a75fc1dc Fugang Duan 2020-05-28 1110 PRINTM(MINFO, 6b4a83a75fc1dc Fugang Duan 2020-05-28 1111 "PCI memory map Virt0: %p PCI memory map Virt2: " 6b4a83a75fc1dc Fugang Duan 2020-05-28 1112 "%p\n", 6b4a83a75fc1dc Fugang Duan 2020-05-28 1113 card->pci_mmap, card->pci_mmap1); 688b67b2c7220b Fugang Duan 2020-04-19 1114 688b67b2c7220b Fugang Duan 2020-04-19 1115 return MLAN_STATUS_SUCCESS; 688b67b2c7220b Fugang Duan 2020-04-19 1116 688b67b2c7220b Fugang Duan 2020-04-19 1117 err_iomap2: 688b67b2c7220b Fugang Duan 2020-04-19 1118 pci_release_region(pdev, 2); 688b67b2c7220b Fugang Duan 2020-04-19 1119 err_req_region2: 688b67b2c7220b Fugang Duan 2020-04-19 @1120 pci_iounmap(pdev, card->pci_mmap); 688b67b2c7220b Fugang Duan 2020-04-19 1121 err_iomap0: 688b67b2c7220b Fugang Duan 2020-04-19 1122 pci_release_region(pdev, 0); 688b67b2c7220b Fugang Duan 2020-04-19 1123 err_req_region0: 688b67b2c7220b Fugang Duan 2020-04-19 1124 #if 0 688b67b2c7220b Fugang Duan 2020-04-19 1125 err_set_dma_mask: 688b67b2c7220b Fugang Duan 2020-04-19 1126 #endif 688b67b2c7220b Fugang Duan 2020-04-19 1127 :::::: The code at line 1094 was first introduced by commit :::::: 688b67b2c7220b01521ffe560da7eee33042c7bd MLK-23806-01 net: wireless: nxp: mxm_wifiex: add initial MxM wifi driver :::::: TO: Fugang Duan <fugang.duan(a)nxp.com&gt; :::::: CC: Fugang Duan <fugang.duan(a)nxp.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org