iommu: Use iommu_group_ref_get/put() for dev->iommu_group

No reason to open code this, use the proper helper functions.

Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/2-v3-328044aa278c+45e49-iommu_probe_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index bdc5ce884b7bf58535cbaf47f89ecd2589571d8c..2f16f988ab363af925af7d5e1a5021aa7af6aaaf 100644 (file)
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -500,7 +500,7 @@ static void __iommu_group_release_device(struct iommu_group *group,
        kfree(grp_dev->name);
        kfree(grp_dev);
        dev->iommu_group = NULL;
-       kobject_put(group->devices_kobj);
+       iommu_group_put(group);
 }
 
 static void iommu_release_device(struct device *dev)
@@ -1067,8 +1067,7 @@ rename:
                goto err_free_name;
        }
 
-       kobject_get(group->devices_kobj);
-
+       iommu_group_ref_get(group);
        dev->iommu_group = group;
 
        mutex_lock(&group->mutex);