intel-iommu: Fix boot inside 64bit virtualbox with io-apic disabled

[safe/jmp/linux-2.6] / drivers / pci / dmar.c

diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index edc5f00..7771b2d 100644 (file)
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -1466,5 +1466,7 @@ int __init dmar_ir_support(void)
 {
        struct acpi_table_dmar *dmar;
        dmar = (struct acpi_table_dmar *)dmar_tbl;
+       if (!dmar)
+               return 0;
        return dmar->flags & 0x1;
 }