tree: https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git pci/driver head: 0508b6f72f055b88df518db4f3811bda9bb35da4 commit: 115c9d41e58388415f4956d0a988c90fb48663b9 [17/24] cxl: Factor out common dev->driver expressions config: powerpc64-allnoconfig (attached as .config) compiler: powerpc64-linux-gcc (GCC) 11.2.0 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://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git/commit/?i... git remote add helgaas-pci https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git git fetch --no-tags helgaas-pci pci/driver git checkout 115c9d41e58388415f4956d0a988c90fb48663b9 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=powerpc 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 >>): drivers/misc/cxl/pci.c: In function 'cxl_vphb_error_detected': >> drivers/misc/cxl/pci.c:1816:29: error: assignment discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers] 1816 | err_handler = afu_drv->err_handler; | ^ drivers/misc/cxl/pci.c: In function 'cxl_pci_slot_reset': drivers/misc/cxl/pci.c:2041:37: error: assignment discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers] 2041 | err_handler = afu_drv->err_handler; | ^ drivers/misc/cxl/pci.c: In function 'cxl_pci_resume': drivers/misc/cxl/pci.c:2090:37: error: assignment discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers] 2090 | err_handler = afu_drv->err_handler; | ^ cc1: all warnings being treated as errors -- drivers/misc/cxl/guest.c: In function 'pci_error_handlers': >> drivers/misc/cxl/guest.c:34:29: error: assignment discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers] 34 | err_handler = afu_drv->err_handler; | ^ cc1: all warnings being treated as errors vim +/const +1816 drivers/misc/cxl/pci.c 1793 1794 static pci_ers_result_t cxl_vphb_error_detected(struct cxl_afu *afu, 1795 pci_channel_state_t state) 1796 { 1797 struct pci_dev *afu_dev; 1798 struct pci_driver *afu_drv; 1799 struct pci_error_handlers *err_handler; 1800 pci_ers_result_t result = PCI_ERS_RESULT_NEED_RESET; 1801 pci_ers_result_t afu_result = PCI_ERS_RESULT_NEED_RESET; 1802 1803 /* There should only be one entry, but go through the list 1804 * anyway 1805 */ 1806 if (afu == NULL || afu->phb == NULL) 1807 return result; 1808 1809 list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) { 1810 afu_drv = afu_dev->driver; 1811 if (!afu_drv) 1812 continue; 1813 1814 afu_dev->error_state = state; 1815 > 1816 err_handler = afu_drv->err_handler; 1817 if (err_handler) 1818 afu_result = err_handler->error_detected(afu_dev, 1819 state); 1820 /* Disconnect trumps all, NONE trumps NEED_RESET */ 1821 if (afu_result == PCI_ERS_RESULT_DISCONNECT) 1822 result = PCI_ERS_RESULT_DISCONNECT; 1823 else if ((afu_result == PCI_ERS_RESULT_NONE) && 1824 (result == PCI_ERS_RESULT_NEED_RESET)) 1825 result = PCI_ERS_RESULT_NONE; 1826 } 1827 return result; 1828 } 1829