mv643xx_eth: calculate descriptor pointer only once in rxq_refill()
Lennert Buytenhek [Thu, 20 Nov 2008 11:59:04 +0000 (03:59 -0800)]
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/mv643xx_eth.c

index d56724a..b56fdf0 100644 (file)
@@ -593,6 +593,7 @@ static int rxq_refill(struct rx_queue *rxq, int budget)
                struct sk_buff *skb;
                int unaligned;
                int rx;
+               struct rx_desc *rx_desc;
 
                skb = __skb_dequeue(&mp->rx_recycle);
                if (skb == NULL)
@@ -615,13 +616,14 @@ static int rxq_refill(struct rx_queue *rxq, int budget)
                if (rxq->rx_used_desc == rxq->rx_ring_size)
                        rxq->rx_used_desc = 0;
 
-               rxq->rx_desc_area[rx].buf_ptr = dma_map_single(NULL, skb->data,
-                                               mp->skb_size, DMA_FROM_DEVICE);
-               rxq->rx_desc_area[rx].buf_size = mp->skb_size;
+               rx_desc = rxq->rx_desc_area + rx;
+
+               rx_desc->buf_ptr = dma_map_single(NULL, skb->data,
+                                       mp->skb_size, DMA_FROM_DEVICE);
+               rx_desc->buf_size = mp->skb_size;
                rxq->rx_skb[rx] = skb;
                wmb();
-               rxq->rx_desc_area[rx].cmd_sts = BUFFER_OWNED_BY_DMA |
-                                               RX_ENABLE_INTERRUPT;
+               rx_desc->cmd_sts = BUFFER_OWNED_BY_DMA | RX_ENABLE_INTERRUPT;
                wmb();
 
                /*