iommu/core: Add bus_type parameter to iommu_domain_alloc

This is necessary to store a pointer to the bus-specific
iommu_ops in the iommu-domain structure. It will be used
later to call into bus-specific iommu-ops.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

1 files changed, 13 insertions, 1 deletions

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 3343264f5105..46e1c24f2f43 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -16,6 +16,7 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  */
 
+#include <linux/device.h>
 #include <linux/kernel.h>
 #include <linux/bug.h>
 #include <linux/types.h>
@@ -71,15 +72,26 @@ bool iommu_found(void)
 }
 EXPORT_SYMBOL_GPL(iommu_found);
 
-struct iommu_domain *iommu_domain_alloc(void)
+struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
 {
         struct iommu_domain *domain;
+        struct iommu_ops *ops;
         int ret;
 
+        if (bus->iommu_ops)
+                ops = bus->iommu_ops;
+        else
+                ops = iommu_ops;
+
+        if (ops == NULL)
+                return NULL;
+
         domain = kmalloc(sizeof(*domain), GFP_KERNEL);
         if (!domain)
                 return NULL;
 
+        domain->ops = ops;
+
         ret = iommu_ops->domain_init(domain);
         if (ret)
                 goto out_free;