diff options
| -rw-r--r-- | drivers/iommu/intel/iommu.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index 072223fe6fe7..4eafc0518fa7 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -3049,6 +3049,7 @@ static int __init probe_acpi_namespace_devices(void) if (dev->bus != &acpi_bus_type) continue; + up_read(&dmar_global_lock); adev = to_acpi_device(dev); mutex_lock(&adev->physical_node_lock); list_for_each_entry(pn, @@ -3058,6 +3059,7 @@ static int __init probe_acpi_namespace_devices(void) break; } mutex_unlock(&adev->physical_node_lock); + down_read(&dmar_global_lock); if (ret) return ret; |