Hi Fugang, First bad commit (maybe != root cause): tree: https://github.com/Freescale/linux-fslc pr/394 head: 0615afea9fc72fd8d47c3ddfb314e0d1d53c51ad commit: f186a4e65f54a28973c743f8c007b18c1ce95be6 [14893/20126] MLK-24962 net: wireless: nxp: mxm_wifiex: upgrade to mxm5x16203 release config: sh-allmodconfig (attached as .config) compiler: sh4-linux-gcc (GCC) 10.3.0 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 pr/394 git checkout f186a4e65f54a28973c743f8c007b18c1ce95be6 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 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': 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': 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); | ^ 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); | ^~~~~~~~~~~~~~~~~~~~~ 1197 | pci_disable_msix(pdev); | ^~~~~~~~~~~~~~~~ | pci_disable_sriov 1209 | ret = pci_enable_msi(pdev); | ^~~~~~~~~~~~~~ | pci_enable_ats 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 +441 drivers/net/wireless/nxp/mxm_wifiex/wlan_src/mlinux/moal_pcie.c 688b67b2c7220b Fugang Duan 2020-04-19 385 688b67b2c7220b Fugang Duan 2020-04-19 386 /** 688b67b2c7220b Fugang Duan 2020-04-19 387 * @brief This function handles PCIE driver probe 688b67b2c7220b Fugang Duan 2020-04-19 388 * 688b67b2c7220b Fugang Duan 2020-04-19 389 * @param pdev A pointer to pci_dev structure 688b67b2c7220b Fugang Duan 2020-04-19 390 * @param id A pointer to pci_device_id structure 688b67b2c7220b Fugang Duan 2020-04-19 391 * 688b67b2c7220b Fugang Duan 2020-04-19 392 * @return error code 688b67b2c7220b Fugang Duan 2020-04-19 393 */ 6b4a83a75fc1dc Fugang Duan 2020-05-28 394 int woal_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id) 688b67b2c7220b Fugang Duan 2020-04-19 395 { 688b67b2c7220b Fugang Duan 2020-04-19 396 pcie_service_card *card = NULL; 688b67b2c7220b Fugang Duan 2020-04-19 397 t_u16 card_type = 0; 688b67b2c7220b Fugang Duan 2020-04-19 398 int ret = 0; 688b67b2c7220b Fugang Duan 2020-04-19 399 688b67b2c7220b Fugang Duan 2020-04-19 400 ENTER(); 688b67b2c7220b Fugang Duan 2020-04-19 401 6b4a83a75fc1dc Fugang Duan 2020-05-28 402 PRINTM(MINFO, "vendor=0x%4.04X device=0x%4.04X rev=%d\n", pdev->vendor, 6b4a83a75fc1dc Fugang Duan 2020-05-28 403 pdev->device, pdev->revision); 688b67b2c7220b Fugang Duan 2020-04-19 404 688b67b2c7220b Fugang Duan 2020-04-19 405 /* Preinit PCIE device so allocate PCIE memory can be successful */ 688b67b2c7220b Fugang Duan 2020-04-19 406 if (woal_pcie_preinit(pdev)) { 688b67b2c7220b Fugang Duan 2020-04-19 407 PRINTM(MFATAL, "MOAL PCIE preinit failed\n"); 688b67b2c7220b Fugang Duan 2020-04-19 408 LEAVE(); 688b67b2c7220b Fugang Duan 2020-04-19 409 return -EFAULT; 688b67b2c7220b Fugang Duan 2020-04-19 410 } 688b67b2c7220b Fugang Duan 2020-04-19 411 688b67b2c7220b Fugang Duan 2020-04-19 412 card = kzalloc(sizeof(pcie_service_card), GFP_KERNEL); 688b67b2c7220b Fugang Duan 2020-04-19 413 if (!card) { 688b67b2c7220b Fugang Duan 2020-04-19 414 PRINTM(MERROR, "%s: failed to alloc memory\n", __func__); 688b67b2c7220b Fugang Duan 2020-04-19 415 ret = -ENOMEM; 688b67b2c7220b Fugang Duan 2020-04-19 416 goto err; 688b67b2c7220b Fugang Duan 2020-04-19 417 } 688b67b2c7220b Fugang Duan 2020-04-19 418 688b67b2c7220b Fugang Duan 2020-04-19 419 card->dev = pdev; 688b67b2c7220b Fugang Duan 2020-04-19 420 688b67b2c7220b Fugang Duan 2020-04-19 421 card_type = woal_update_card_type(card); 688b67b2c7220b Fugang Duan 2020-04-19 422 if (!card_type) { 688b67b2c7220b Fugang Duan 2020-04-19 423 PRINTM(MERROR, "pcie probe: woal_update_card_type() failed\n"); 688b67b2c7220b Fugang Duan 2020-04-19 424 ret = MLAN_STATUS_FAILURE; 688b67b2c7220b Fugang Duan 2020-04-19 425 goto err; 688b67b2c7220b Fugang Duan 2020-04-19 426 } 688b67b2c7220b Fugang Duan 2020-04-19 427 woal_pcie_init(card); 688b67b2c7220b Fugang Duan 2020-04-19 428 6b4a83a75fc1dc Fugang Duan 2020-05-28 429 if (woal_add_card(card, &card->dev->dev, &pcie_ops, card_type) == 6b4a83a75fc1dc Fugang Duan 2020-05-28 430 NULL) { 688b67b2c7220b Fugang Duan 2020-04-19 431 woal_pcie_cleanup(card); 688b67b2c7220b Fugang Duan 2020-04-19 432 PRINTM(MERROR, "%s: failed\n", __func__); 688b67b2c7220b Fugang Duan 2020-04-19 433 ret = -EFAULT; 688b67b2c7220b Fugang Duan 2020-04-19 434 goto err; 688b67b2c7220b Fugang Duan 2020-04-19 435 } 688b67b2c7220b Fugang Duan 2020-04-19 436 688b67b2c7220b Fugang Duan 2020-04-19 437 LEAVE(); 688b67b2c7220b Fugang Duan 2020-04-19 438 return ret; 688b67b2c7220b Fugang Duan 2020-04-19 439 err: 688b67b2c7220b Fugang Duan 2020-04-19 440 kfree(card); 688b67b2c7220b Fugang Duan 2020-04-19 @441 if (pci_is_enabled(pdev)) 688b67b2c7220b Fugang Duan 2020-04-19 442 pci_disable_device(pdev); 688b67b2c7220b Fugang Duan 2020-04-19 443 688b67b2c7220b Fugang Duan 2020-04-19 444 LEAVE(); 688b67b2c7220b Fugang Duan 2020-04-19 445 return ret; 688b67b2c7220b Fugang Duan 2020-04-19 446 } 688b67b2c7220b Fugang Duan 2020-04-19 447 :::::: The code at line 441 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