[PATCH] vfio/type1: Use the new helper to find vfio_group

[Zenghui Yu]

When attaching a new group to the container, let's use the new helper
vfio_iommu_find_iommu_group() to check if it's already attached. There
is no functional change.

Also take this chance to add a missing blank line.

Signed-off-by: Zenghui Yu <yuzeng...@huawei.com>
---
 drivers/vfio/vfio_iommu_type1.c | 17 +++++------------
 1 file changed, 5 insertions(+), 12 deletions(-)

diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index a05d856ae806..aa586bd684da 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -1997,6 +1997,7 @@ static void vfio_iommu_iova_insert_copy(struct vfio_iommu 
*iommu,
 
        list_splice_tail(iova_copy, iova);
 }
+
 static int vfio_iommu_type1_attach_group(void *iommu_data,
                                         struct iommu_group *iommu_group)
 {
@@ -2013,18 +2014,10 @@ static int vfio_iommu_type1_attach_group(void 
*iommu_data,
 
        mutex_lock(&iommu->lock);
 
-       list_for_each_entry(d, &iommu->domain_list, next) {
-               if (find_iommu_group(d, iommu_group)) {
-                       mutex_unlock(&iommu->lock);
-                       return -EINVAL;
-               }
-       }
-
-       if (iommu->external_domain) {
-               if (find_iommu_group(iommu->external_domain, iommu_group)) {
-                       mutex_unlock(&iommu->lock);
-                       return -EINVAL;
-               }
+       /* Check for duplicates */
+       if (vfio_iommu_find_iommu_group(iommu, iommu_group)) {
+               mutex_unlock(&iommu->lock);
+               return -EINVAL;
        }
 
        group = kzalloc(sizeof(*group), GFP_KERNEL);
-- 
2.19.1