iommu/amd: Remove queue_release() function

We can use queue_ring_free_flushed() instead, so remove this
redundancy.

Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 00c1796..6498f5b 100644 (file)
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -1859,21 +1859,6 @@ static inline bool queue_ring_full(struct flush_queue *queue)
 #define queue_ring_for_each(i, q) \
        for (i = (q)->head; i != (q)->tail; i = (i + 1) % FLUSH_QUEUE_SIZE)
 
-static void queue_release(struct dma_ops_domain *dom,
-                         struct flush_queue *queue)
-{
-       unsigned i;
-
-       assert_spin_locked(&queue->lock);
-
-       queue_ring_for_each(i, queue)
-               free_iova_fast(&dom->iovad,
-                              queue->entries[i].iova_pfn,
-                              queue->entries[i].pages);
-
-       queue->head = queue->tail = 0;
-}
-
 static inline unsigned queue_ring_add(struct flush_queue *queue)
 {
        unsigned idx = queue->tail;
@@ -1925,12 +1910,15 @@ static void queue_add(struct dma_ops_domain *dom,
        queue = get_cpu_ptr(dom->flush_queue);
        spin_lock_irqsave(&queue->lock, flags);
 
-       queue_ring_free_flushed(dom, queue);
-
-       if (queue_ring_full(queue)) {
+       /*
+        * When ring-queue is full, flush the entries from the IOTLB so
+        * that we can free all entries with queue_ring_free_flushed()
+        * below.
+        */
+       if (queue_ring_full(queue))
                dma_ops_domain_flush_tlb(dom);
-               queue_release(dom, queue);
-       }
+
+       queue_ring_free_flushed(dom, queue);
 
        idx = queue_ring_add(queue);