1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index edc5f002e055..7771b2dd5978 100644
--- 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;
 }