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>

diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
index e135ab8..c33b7b1 100644 (file)
--- 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;
 }