Hi Marc, FYI, the error/warning still remains. tree: https://github.com/frank-w/BPI-R2-4.14 5.11-rc head: 53902a2a421d0384bda73803e4df56ff3fbc1bc6 commit: 7aa45ecfc9a987d4b0f719f906fe892254d39349 [9/18] pci: fix MSI issue part 2 config: x86_64-randconfig-m001-20210215 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://github.com/frank-w/BPI-R2-4.14/commit/7aa45ecfc9a987d4b0f719f906f... git remote add frank-w-bpi-r2-4.14 https://github.com/frank-w/BPI-R2-4.14 git fetch --no-tags frank-w-bpi-r2-4.14 5.11-rc git checkout 7aa45ecfc9a987d4b0f719f906fe892254d39349 # save the attached .config to linux build tree make W=1 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 >>): drivers/pci/probe.c: In function 'pci_register_host_bridge': 930 | (bridge->msi_domain && !bus->dev.msi_domain)) | ^~~~~~~~~~ | pm_domain vim +930 drivers/pci/probe.c 904 905 b = pci_find_bus(pci_domain_nr(bus), bridge->busnr); 906 if (b) { 907 /* Ignore it if we already got here via a different bridge */ 908 dev_dbg(&b->dev, "bus already known\n"); 909 err = -EEXIST; 910 goto free; 911 } 912 913 dev_set_name(&bridge->dev, "pci%04x:%02x", pci_domain_nr(bus), 914 bridge->busnr); 915 916 err = pcibios_root_bridge_prepare(bridge); 917 if (err) 918 goto free; 919 920 err = device_add(&bridge->dev); 921 if (err) { 922 put_device(&bridge->dev); 923 goto free; 924 } 925 bus->bridge = get_device(&bridge->dev); 926 device_enable_async_suspend(bus->bridge); 927 pci_set_bus_of_node(bus); 928 pci_set_bus_msi_domain(bus); 929 if (bridge->no_msi || 931 bus->bus_flags |= PCI_BUS_FLAGS_NO_MSI; 932 933 if (!parent) 934 set_dev_node(bus->bridge, pcibus_to_node(bus)); 935 936 bus->dev.class = &pcibus_class; 937 bus->dev.parent = bus->bridge; 938 939 dev_set_name(&bus->dev, "%04x:%02x", pci_domain_nr(bus), bus->number); 940 name = dev_name(&bus->dev); 941 942 err = device_register(&bus->dev); 943 if (err) 944 goto unregister; 945 946 pcibios_add_bus(bus); 947 948 if (bus->ops->add_bus) { 949 err = bus->ops->add_bus(bus); 950 if (WARN_ON(err < 0)) 951 dev_err(&bus->dev, "failed to add bus: %d\n", err); 952 } 953 954 /* Create legacy_io and legacy_mem files for this bus */ 955 pci_create_legacy_files(bus); 956 957 if (parent) 958 dev_info(parent, "PCI host bridge to bus %s\n", name); 959 else 960 pr_info("PCI host bridge to bus %s\n", name); 961 962 if (nr_node_ids > 1 && pcibus_to_node(bus) == NUMA_NO_NODE) 963 dev_warn(&bus->dev, "Unknown NUMA node; performance will be reduced\n"); 964 965 /* Add initial resources to the bus */ 966 resource_list_for_each_entry_safe(window, n, &resources) { 967 list_move_tail(&window->node, &bridge->windows); 968 offset = window->offset; 969 res = window->res; 970 971 if (res->flags & IORESOURCE_BUS) 972 pci_bus_insert_busn_res(bus, bus->number, res->end); 973 else 974 pci_bus_add_resource(bus, res, 0); 975 976 if (offset) { 977 if (resource_type(res) == IORESOURCE_IO) 978 fmt = " (bus address [%#06llx-%#06llx])"; 979 else 980 fmt = " (bus address [%#010llx-%#010llx])"; 981 982 snprintf(addr, sizeof(addr), fmt, 983 (unsigned long long)(res->start - offset), 984 (unsigned long long)(res->end - offset)); 985 } else 986 addr[0] = '\0'; 987 988 dev_info(&bus->dev, "root bus resource %pR%s\n", res, addr); 989 } 990 991 down_write(&pci_bus_sem); 992 list_add_tail(&bus->node, &pci_root_buses); 993 up_write(&pci_bus_sem); 994 995 return 0; 996 997 unregister: 998 put_device(&bridge->dev); 999 device_del(&bridge->dev); 1000 1001 free: 1002 kfree(bus); 1003 return err; 1004 } 1005 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org