tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git pci-probe-rework-20210320 head: 7339be76e8b2bf033b46af22922fd3ab88c122d2 commit: 3b0acc0ac3c7dc0ecb99215c7eb87a41a4acd79f [21/24] powerpc: rework PCI host allocation config: powerpc-allyesconfig (attached as .config) compiler: powerpc64-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://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/commi... git remote add arnd-playground https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git git fetch --no-tags arnd-playground pci-probe-rework-20210320 git checkout 3b0acc0ac3c7dc0ecb99215c7eb87a41a4acd79f # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 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 warnings (new ones prefixed by >>): 1666 | void pci_scan_host_bridge(struct pci_host_bridge *bridge) | ^~~~~~~~~~~~~~~~~~~~ vim +/pci_scan_host_bridge +1666 arch/powerpc/kernel/pci-common.c 1661 1662 /** 1663 * pci_scan_host_bridge - Given a pci_controller, setup and scan the PCI bus 1664 * @bridge: Pointer to the PCI host controller instance structure 1665 */ 1667 { 1668 struct pci_controller *hose = pci_host_bridge_priv(bridge); 1669 struct device_node *node = hose->dn; 1670 int mode; 1671 int error; 1672 1673 pr_debug("PCI: Scanning PHB %pOF\n", node); 1674 1675 /* Get some IO space for the new PHB */ 1676 pcibios_setup_phb_io_space(hose); 1677 1678 /* Wire up PHB bus resources */ 1679 pcibios_setup_phb_resources(hose); 1680 1681 bridge->sysdata = hose; 1682 bridge->busnr = hose->first_busno; 1683 bridge->custom_bus_scan = 1; 1684 1685 hose->busn.start = hose->first_busno; 1686 hose->busn.end = hose->last_busno; 1687 hose->busn.flags = IORESOURCE_BUS; 1688 pci_add_resource(&bridge->windows, &hose->busn); 1689 1690 mode = PCI_PROBE_NORMAL; 1691 if (node && hose->controller_ops.probe_mode) 1692 mode = hose->controller_ops.probe_mode(bridge->bus); 1693 /* Get probe mode and perform scan */ 1694 pr_debug(" probe mode: %d\n", mode); 1695 if (mode == PCI_PROBE_DEVTREE) 1696 bridge->custom_bus_scan = 1; 1697 1698 /* Create an empty bus for the toplevel */ 1699 error = pci_scan_root_bus_bridge(bridge); 1700 if (error) { 1701 pr_err("Failed to create bus for PCI domain %04x: %d\n", 1702 hose->global_number, error); 1703 pci_free_host_bridge(bridge); 1704 return; 1705 } 1706 1707 if (mode == PCI_PROBE_DEVTREE) 1708 of_scan_bus(node, bridge->bus); 1709 1710 /* Platform gets a chance to do some global fixups before 1711 * we proceed to resource allocation 1712 */ 1713 if (ppc_md.pcibios_fixup_phb) 1714 ppc_md.pcibios_fixup_phb(hose); 1715 1716 /* Configure PCI Express settings */ 1717 if (bridge->bus && !pci_has_flag(PCI_PROBE_ONLY)) { 1718 struct pci_bus *child; 1719 list_for_each_entry(child, &bridge->bus->children, node) 1720 pcie_bus_configure_settings(child); 1721 } 1722 } 1723 EXPORT_SYMBOL_GPL(pcibios_scan_host_bridge); 1724 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org