return ret;
}
+static bool iommu_is_attach_deferred(struct device *dev)
+{
+ const struct iommu_ops *ops = dev_iommu_ops(dev);
+
+ if (ops->is_attach_deferred)
+ return ops->is_attach_deferred(dev);
+
+ return false;
+}
+
+static int iommu_group_do_dma_first_attach(struct device *dev, void *data)
+{
+ struct iommu_domain *domain = data;
+
+ lockdep_assert_held(&dev->iommu_group->mutex);
+
+ if (iommu_is_attach_deferred(dev)) {
+ dev->iommu->attach_deferred = 1;
+ return 0;
+ }
+
+ return __iommu_attach_device(domain, dev);
+}
+
int iommu_probe_device(struct device *dev)
{
const struct iommu_ops *ops;
* attach the default domain.
*/
if (group->default_domain && !group->owner) {
- ret = __iommu_attach_device(group->default_domain, dev);
+ ret = iommu_group_do_dma_first_attach(dev, group->default_domain);
if (ret) {
mutex_unlock(&group->mutex);
iommu_group_put(group);
return ret;
}
-static bool iommu_is_attach_deferred(struct device *dev)
-{
- const struct iommu_ops *ops = dev_iommu_ops(dev);
-
- if (ops->is_attach_deferred)
- return ops->is_attach_deferred(dev);
-
- return false;
-}
-
/**
* iommu_group_add_device - add a device to an iommu group
* @group: the group into which to add the device (reference should be held)
mutex_lock(&group->mutex);
list_add_tail(&device->list, &group->devices);
- if (group->domain && !iommu_is_attach_deferred(dev))
- ret = __iommu_attach_device(group->domain, dev);
+ if (group->domain)
+ ret = iommu_group_do_dma_first_attach(dev, group->domain);
mutex_unlock(&group->mutex);
if (ret)
goto err_put_group;
}
-static int iommu_group_do_dma_attach(struct device *dev, void *data)
-{
- struct iommu_domain *domain = data;
- int ret = 0;
-
- if (!iommu_is_attach_deferred(dev))
- ret = __iommu_attach_device(domain, dev);
-
- return ret;
-}
-
-static int __iommu_group_dma_attach(struct iommu_group *group)
+static int __iommu_group_dma_first_attach(struct iommu_group *group)
{
return __iommu_group_for_each_dev(group, group->default_domain,
- iommu_group_do_dma_attach);
+ iommu_group_do_dma_first_attach);
}
static int iommu_group_do_probe_finalize(struct device *dev, void *data)
iommu_group_create_direct_mappings(group);
- ret = __iommu_group_dma_attach(group);
+ ret = __iommu_group_dma_first_attach(group);
mutex_unlock(&group->mutex);
return -ENODEV;
ret = domain->ops->attach_dev(domain, dev);
- if (!ret)
- trace_attach_device_to_domain(dev);
- return ret;
+ if (ret)
+ return ret;
+ dev->iommu->attach_deferred = 0;
+ trace_attach_device_to_domain(dev);
+ return 0;
}
/**
int iommu_deferred_attach(struct device *dev, struct iommu_domain *domain)
{
- if (iommu_is_attach_deferred(dev))
+ if (dev->iommu && dev->iommu->attach_deferred)
return __iommu_attach_device(domain, dev);
return 0;
static void __iommu_detach_device(struct iommu_domain *domain,
struct device *dev)
{
- if (iommu_is_attach_deferred(dev))
- return;
-
domain->ops->detach_dev(domain, dev);
trace_detach_device_from_domain(dev);
}