commit b6d57f1da7e81cb056619d41cf015ebe306c296c
author Jeffy Chen <jeffy.chen@rock-chips.com> Thu Mar 01 19:22:08 2018 +0800
committer Joerg Roedel <jroedel@suse.de> Thu Mar 15 15:54:52 2018 +0100
tree 723656eed902af7df4b44bcd0133ec53d6941d0c
parent 0c8efd610b58cb23cefdfa12015799079aef94ae

iommu/omap: Increase group ref in .device_group()

Increase group refcounting in omap_iommu_device_group().

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/omap-iommu.c

diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
index e135ab8..c33b7b10 100644
--- a/drivers/iommu/omap-iommu.c
+++ b/drivers/iommu/omap-iommu.c
@@ -1536,7 +1536,7 @@ static struct iommu_group *omap_iommu_device_group(struct device *dev)
 	struct iommu_group *group = ERR_PTR(-EINVAL);
 
 	if (arch_data->iommu_dev)
-		group = arch_data->iommu_dev->group;
+		group = iommu_group_ref_get(arch_data->iommu_dev->group);
 
 	return group;
 }