[PATCH 1/4] iommu: Move iommu_group_create_direct_mappings to after device_attach

[James Sewart]

If an IOMMU driver requires to know which IOMMU a domain is associated
to initialise a domain then it will do so in device_attach, before which
it is not safe to call iommu_ops.

Signed-off-by: James Sewart <jamessewart@xxxxxxxxxx>
---
 drivers/iommu/iommu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 3ed4db334341..1c6ffbb2d20e 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -652,8 +652,6 @@ int iommu_group_add_device(struct iommu_group *group, struct device *dev)
 
 	dev->iommu_group = group;
 
-	iommu_group_create_direct_mappings(group, dev);
-
 	mutex_lock(&group->mutex);
 	list_add_tail(&device->list, &group->devices);
 	if (group->domain)
@@ -662,6 +660,8 @@ int iommu_group_add_device(struct iommu_group *group, struct device *dev)
 	if (ret)
 		goto err_put_group;
 
+	iommu_group_create_direct_mappings(group, dev);
+
 	/* Notify any listeners about change to group. */
 	blocking_notifier_call_chain(&group->notifier,
 				     IOMMU_GROUP_NOTIFY_ADD_DEVICE, dev);
-- 
2.17.1