1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index a88576d50740..8ccbd7023194 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -903,8 +903,10 @@ int __init detect_intel_iommu(void)
                 x86_init.iommu.iommu_init = intel_iommu_init;
 #endif
 
-        acpi_put_table(dmar_tbl);
-        dmar_tbl = NULL;
+        if (dmar_tbl) {
+                acpi_put_table(dmar_tbl);
+                dmar_tbl = NULL;
+        }
         up_write(&dmar_global_lock);
 
         return ret ? 1 : -ENODEV;