iommu/vt-d: Clear the redundant assignment in dmar_enable_qi

__dmar_enable_qi() will initialize free_head,free_tail and
free_cnt for q_inval. Remove the redundant initialization
in dmar_enable_qi().

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 9a4f05e5b23fa480e308d0b44373e6599ad82982..f2eb0bc419f8e0879eb7da8a477e9b79d8ccc75e 100644 (file)
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -1339,9 +1339,6 @@ int dmar_enable_qi(struct intel_iommu *iommu)
                return -ENOMEM;
        }
 
-       qi->free_head = qi->free_tail = 0;
-       qi->free_cnt = QI_LENGTH;
-
        raw_spin_lock_init(&qi->q_lock);
 
        __dmar_enable_qi(iommu);