1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 850d7bf0c873..ae3fe4e64203 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -768,6 +768,13 @@ static void pci_acpi_root_add_resources(struct acpi_pci_root_info *info)
                 else
                         continue;
 
+                /*
+                 * Some legacy x86 host bridge drivers use iomem_resource and
+                 * ioport_resource as default resource pool, skip it.
+                 */
+                if (res == root)
+                        continue;
+
                 conflict = insert_resource_conflict(root, res);
                 if (conflict) {
                         dev_info(&info->bridge->dev,