diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 2e9811bf2a4e5573aa364ba11ed05f3dda474ce9..abf0097f899d5f47012f8479d266fecbd75f6845 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -2177,17 +2177,6 @@ static bool device_rmrr_is_relaxable(struct device *dev)
 		return false;
 }
 
-/*
- * Return the required default domain type for a specific device.
- *
- * @dev: the device in query
- * @startup: true if this is during early boot
- *
- * Returns:
- *  - IOMMU_DOMAIN_DMA: device requires a dynamic mapping domain
- *  - IOMMU_DOMAIN_IDENTITY: device requires an identical mapping domain
- *  - 0: both identity and dynamic domains work for this device
- */
 static int device_def_domain_type(struct device *dev)
 {
 	if (dev_is_pci(dev)) {