[RESEND PATCH v3 4/4] iommu: avoid taking iova_rbtree_lock twice

From: Cong Wang Both find_iova() and __free_iova() take iova_rbtree_lock, there is no reason to take and release it twice inside free_iova(). Fold them into one critical section by calling the unlock versions instead. Signed-off-by: Cong Wang Reviewed-by: Robin Murphy Signed-off-by: John Garr

[PATCH v3 4/4] iommu: avoid taking iova_rbtree_lock twice

From: Cong Wang Both find_iova() and __free_iova() take iova_rbtree_lock, there is no reason to take and release it twice inside free_iova(). Fold them into one critical section by calling the unlock versions instead. Signed-off-by: Cong Wang Reviewed-by: Robin Murphy Signed-off-by: John Garr