iommu/amd: Do not iterate over alias-list in __[attach|detach]_device

The alias list is handled aleady by iommu core code. No need
anymore to handle it in this part of the AMD IOMMU code

Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 6070b15044975a57352af051aa2f2ad609c622c8..e8443e6ff1b14ca8a6bd1e6033d0d473586f166b 100644 (file)
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2028,29 +2028,17 @@ static void do_detach(struct iommu_dev_data *dev_data)
 static int __attach_device(struct iommu_dev_data *dev_data,
                           struct protection_domain *domain)
 {
-       struct iommu_dev_data *head, *entry;
        int ret;
 
        /* lock domain */
        spin_lock(&domain->lock);
 
-       head = dev_data;
-
-       if (head->alias_data != NULL)
-               head = head->alias_data;
-
-       /* Now we have the root of the alias group, if any */
-
        ret = -EBUSY;
-       if (head->domain != NULL)
+       if (dev_data->domain != NULL)
                goto out_unlock;
 
        /* Attach alias group root */
-       do_attach(head, domain);
-
-       /* Attach other devices in the alias group */
-       list_for_each_entry(entry, &head->alias_list, alias_list)
-               do_attach(entry, domain);
+       do_attach(dev_data, domain);
 
        ret = 0;
 
@@ -2200,7 +2188,6 @@ static int attach_device(struct device *dev,
  */
 static void __detach_device(struct iommu_dev_data *dev_data)
 {
-       struct iommu_dev_data *head, *entry;
        struct protection_domain *domain;
        unsigned long flags;
 
@@ -2211,14 +2198,7 @@ static void __detach_device(struct iommu_dev_data *dev_data)
 
        spin_lock_irqsave(&domain->lock, flags);
 
-       head = dev_data;
-       if (head->alias_data != NULL)
-               head = head->alias_data;
-
-       list_for_each_entry(entry, &head->alias_list, alias_list)
-               do_detach(entry);
-
-       do_detach(head);
+       do_detach(dev_data);
 
        spin_unlock_irqrestore(&domain->lock, flags);
 }