Hi Kuppuswamy, I love your patch! Yet something to improve: [auto build test ERROR on pci/next] [also build test ERROR on v5.9] [cannot apply to next-20201013] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Kuppuswamy-Sathyanarayanan/PCI-E... base: https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next config: x86_64-randconfig-a004-20201014 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project e7fe3c6dfede8d5781bd000741c3dea7088307a4) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/0day-ci/linux/commit/7c892978aa57817ac512ea311d0d87dd6... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Kuppuswamy-Sathyanarayanan/PCI-ERR-Call-pci_bus_reset-before-calling-slot_reset-callback/20201014-172736 git checkout 7c892978aa57817ac512ea311d0d87dd6e1ced80 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 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 >>): static pci_ers_result_t pcie_do_fatal_recovery(struct pci_dev *dev, ^ drivers/pci/pcie/../pci.h:559:18: note: previous declaration is here pci_ers_result_t pcie_do_fatal_recovery(struct pci_dev *dev, ^ 1 error generated. vim +/pcie_do_fatal_recovery +144 drivers/pci/pcie/err.c 143 145 pci_ers_result_t (*reset_link)(struct pci_dev *pdev)) 146 { 147 struct pci_dev *udev; 148 struct pci_bus *parent; 149 struct pci_dev *pdev, *temp; 150 pci_ers_result_t result; 151 152 if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) 153 udev = dev; 154 else 155 udev = dev->bus->self; 156 157 parent = udev->subordinate; 158 pci_walk_bus(parent, pci_dev_set_disconnected, NULL); 159 160 pci_lock_rescan_remove(); 161 pci_dev_get(dev); 162 list_for_each_entry_safe_reverse(pdev, temp, &parent->devices, 163 bus_list) { 164 pci_stop_and_remove_bus_device(pdev); 165 } 166 167 result = reset_link(udev); 168 169 if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) { 170 /* 171 * If the error is reported by a bridge, we think this error 172 * is related to the downstream link of the bridge, so we 173 * do error recovery on all subordinates of the bridge instead 174 * of the bridge and clear the error status of the bridge. 175 */ 176 pci_aer_clear_fatal_status(dev); 177 if (pcie_aer_is_native(dev)) 178 pcie_clear_device_status(dev); 179 } 180 181 if (result == PCI_ERS_RESULT_RECOVERED) { 182 if (pcie_wait_for_link(udev, true)) 183 pci_rescan_bus(udev->bus); 184 pci_info(dev, "Device recovery from fatal error successful\n"); 185 } else { 186 pci_uevent_ers(dev, PCI_ERS_RESULT_DISCONNECT); 187 pci_info(dev, "Device recovery from fatal error failed\n"); 188 } 189 190 pci_dev_put(dev); 191 pci_unlock_rescan_remove(); 192 193 return result; 194 } 195 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org