Merge branches 'iommu/fixes', 'arm/exynos', 'arm/renesas', 'arm/smmu', 'arm/mediatek...

[mirror_ubuntu-bionic-kernel.git] / drivers / iommu / dmar.c

diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index fc13146f8d16be7f1734dbcf720fbc9239a5eeae..d9c0decfc91ae2cef9ccf21c3a99afb455bbb9fa 100644 (file)
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -905,8 +905,10 @@ 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;