1 files changed, 2 insertions, 0 deletions

diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
index 33e6a0b995fc..831971e731f7 100644
--- a/arch/x86/pci/i386.c
+++ b/arch/x86/pci/i386.c
@@ -57,6 +57,8 @@ static struct pcibios_fwaddrmap *pcibios_fwaddrmap_lookup(struct pci_dev *dev)
 {
         struct pcibios_fwaddrmap *map;
 
+        WARN_ON(!spin_is_locked(&pcibios_fwaddrmap_lock));
+
         list_for_each_entry(map, &pcibios_fwaddrmappings, list)
                 if (map->dev == dev)
                         return map;