Fix following coccicheck warning:
drivers/iommu/apple-dart.c:704:20-27: WARNING opportunity for kmemdup

Signed-off-by: Wan Jiabing <[email protected]>
---
 drivers/iommu/apple-dart.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/iommu/apple-dart.c b/drivers/iommu/apple-dart.c
index 280ff8df728d..5eeb8d6b72e2 100644
--- a/drivers/iommu/apple-dart.c
+++ b/drivers/iommu/apple-dart.c
@@ -701,13 +701,12 @@ static struct iommu_group *apple_dart_device_group(struct 
device *dev)
        if (!group)
                goto out;
 
-       group_master_cfg = kzalloc(sizeof(*group_master_cfg), GFP_KERNEL);
+       group_master_cfg = kmemdup(cfg, sizeof(*group_master_cfg), GFP_KERNEL);
        if (!group_master_cfg) {
                iommu_group_put(group);
                goto out;
        }
 
-       memcpy(group_master_cfg, cfg, sizeof(*group_master_cfg));
        iommu_group_set_iommudata(group, group_master_cfg,
                apple_dart_release_group);
 
-- 
2.20.1

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