From: Jeffy Chen <jeffy.chen@rock-chips.com>
Date: Thu, 1 Mar 2018 11:22:08 +0000 (+0800)
Subject: iommu/omap: Increase group ref in .device_group()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b6d57f1da7e81cb056619d41cf015ebe306c296c;p=linux.git

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 e135ab830ebfe..c33b7b104e72a 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;
 }