---

yaml --- r: 373574 b: refs/heads/master c: aa16bea h: refs/heads/master v: v3
git-mirror · Apr 24, 2013 · f3231e1 · f3231e1
1 parent 9fe18ed
commit f3231e1
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Showing 3 changed files with 31 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 61e015ac5b4d46c2054a78d9bc82c840274929a0
+refs/heads/master: aa16bea929aed6ea854b55d2be8306a9fb40e694
diff --git a/trunk/drivers/iommu/iommu.c b/trunk/drivers/iommu/iommu.c
@@ -204,6 +204,35 @@ struct iommu_group *iommu_group_alloc(void)
 }
 EXPORT_SYMBOL_GPL(iommu_group_alloc);
 
+struct iommu_group *iommu_group_get_by_id(int id)
+{
+	struct kobject *group_kobj;
+	struct iommu_group *group;
+	const char *name;
+
+	if (!iommu_group_kset)
+		return NULL;
+
+	name = kasprintf(GFP_KERNEL, "%d", id);
+	if (!name)
+		return NULL;
+
+	group_kobj = kset_find_obj(iommu_group_kset, name);
+	kfree(name);
+
+	if (!group_kobj)
+		return NULL;
+
+	group = container_of(group_kobj, struct iommu_group, kobj);
+	BUG_ON(group->id != id);
+
+	kobject_get(group->devices_kobj);
+	kobject_put(&group->kobj);
+
+	return group;
+}
+EXPORT_SYMBOL_GPL(iommu_group_get_by_id);
+
 /**
  * iommu_group_get_iommudata - retrieve iommu_data registered for a group
  * @group: the group

diff --git a/trunk/include/linux/iommu.h b/trunk/include/linux/iommu.h
@@ -126,6 +126,7 @@ struct iommu_ops {
 extern int bus_set_iommu(struct bus_type *bus, struct iommu_ops *ops);
 extern bool iommu_present(struct bus_type *bus);
 extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
+extern struct iommu_group *iommu_group_get_by_id(int id);
 extern void iommu_domain_free(struct iommu_domain *domain);
 extern int iommu_attach_device(struct iommu_domain *domain,
 			       struct device *dev);