1 files changed, 3 insertions, 66 deletions

diff --git a/drivers/iommu/intel/pasid.c b/drivers/iommu/intel/pasid.c
index cb4c1d0cf25c..17cad7c1f62d 100644
--- a/drivers/iommu/intel/pasid.c
+++ b/drivers/iommu/intel/pasid.c
@@ -86,54 +86,6 @@ void vcmd_free_pasid(struct intel_iommu *iommu, u32 pasid)
 /*
  * Per device pasid table management:
  */
-static inline void
-device_attach_pasid_table(struct device_domain_info *info,
-			  struct pasid_table *pasid_table)
-{
-	info->pasid_table = pasid_table;
-	list_add(&info->table, &pasid_table->dev);
-}
-
-static inline void
-device_detach_pasid_table(struct device_domain_info *info,
-			  struct pasid_table *pasid_table)
-{
-	info->pasid_table = NULL;
-	list_del(&info->table);
-}
-
-struct pasid_table_opaque {
-	struct pasid_table	**pasid_table;
-	int			segment;
-	int			bus;
-	int			devfn;
-};
-
-static int search_pasid_table(struct device_domain_info *info, void *opaque)
-{
-	struct pasid_table_opaque *data = opaque;
-
-	if (info->iommu->segment == data->segment &&
-	    info->bus == data->bus &&
-	    info->devfn == data->devfn &&
-	    info->pasid_table) {
-		*data->pasid_table = info->pasid_table;
-		return 1;
-	}
-
-	return 0;
-}
-
-static int get_alias_pasid_table(struct pci_dev *pdev, u16 alias, void *opaque)
-{
-	struct pasid_table_opaque *data = opaque;
-
-	data->segment = pci_domain_nr(pdev->bus);
-	data->bus = PCI_BUS_NUM(alias);
-	data->devfn = alias & 0xff;
-
-	return for_each_device_domain(&search_pasid_table, data);
-}
 
 /*
  * Allocate a pasid table for @dev. It should be called in a
@@ -143,28 +95,18 @@ int intel_pasid_alloc_table(struct device *dev)
 {
 	struct device_domain_info *info;
 	struct pasid_table *pasid_table;
-	struct pasid_table_opaque data;
 	struct page *pages;
 	u32 max_pasid = 0;
-	int ret, order;
-	int size;
+	int order, size;
 
 	might_sleep();
 	info = dev_iommu_priv_get(dev);
 	if (WARN_ON(!info || !dev_is_pci(dev) || info->pasid_table))
 		return -EINVAL;
 
-	/* DMA alias device already has a pasid table, use it: */
-	data.pasid_table = &pasid_table;
-	ret = pci_for_each_dma_alias(to_pci_dev(dev),
-				     &get_alias_pasid_table, &data);
-	if (ret)
-		goto attach_out;
-
 	pasid_table = kzalloc(sizeof(*pasid_table), GFP_KERNEL);
 	if (!pasid_table)
 		return -ENOMEM;
-	INIT_LIST_HEAD(&pasid_table->dev);
 
 	if (info->pasid_supported)
 		max_pasid = min_t(u32, pci_max_pasids(to_pci_dev(dev)),
@@ -182,9 +124,7 @@ int intel_pasid_alloc_table(struct device *dev)
 	pasid_table->table = page_address(pages);
 	pasid_table->order = order;
 	pasid_table->max_pasid = 1 << (order + PAGE_SHIFT + 3);
-
-attach_out:
-	device_attach_pasid_table(info, pasid_table);
+	info->pasid_table = pasid_table;
 
 	return 0;
 }
@@ -202,10 +142,7 @@ void intel_pasid_free_table(struct device *dev)
 		return;
 
 	pasid_table = info->pasid_table;
-	device_detach_pasid_table(info, pasid_table);
-
-	if (!list_empty(&pasid_table->dev))
-		return;
+	info->pasid_table = NULL;
 
 	/* Free scalable mode PASID directory tables: */
 	dir = pasid_table->table;