1 files changed, 4 insertions, 0 deletions

diff --git a/arch/x86/pci/olpc.c b/arch/x86/pci/olpc.c
index 13700ec8e2e4..5262603b04d9 100644
--- a/arch/x86/pci/olpc.c
+++ b/arch/x86/pci/olpc.c
@@ -206,6 +206,8 @@ static int pci_olpc_read(unsigned int seg, unsigned int bus,
 {
         uint32_t *addr;
 
+        WARN_ON(seg);
+
         /* Use the hardware mechanism for non-simulated devices */
         if (!is_simulated(bus, devfn))
                 return pci_direct_conf1.read(seg, bus, devfn, reg, len, value);
@@ -264,6 +266,8 @@ static int pci_olpc_read(unsigned int seg, unsigned int bus,
 static int pci_olpc_write(unsigned int seg, unsigned int bus,
                 unsigned int devfn, int reg, int len, uint32_t value)
 {
+        WARN_ON(seg);
+
         /* Use the hardware mechanism for non-simulated devices */
         if (!is_simulated(bus, devfn))
                 return pci_direct_conf1.write(seg, bus, devfn, reg, len, value);