bcm63xx_enet: switch to napi_build_skb() to reuse skbuff_heads

napi_build_skb() reuses NAPI skbuff_head cache in order to save some
cycles on freeing/allocating skbuff_heads on every new Rx or completed
Tx.
Use napi_consume_skb() to feed the cache with skbuff_heads of completed
Tx so it's never empty.

Signed-off-by: Sieng Piaw Liew <liew.s.piaw@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
index 698438a..514d61d 100644 (file)
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -388,7 +388,7 @@ static int bcm_enet_receive_queue(struct net_device *dev, int budget)
                                         priv->rx_buf_size, DMA_FROM_DEVICE);
                        priv->rx_buf[desc_idx] = NULL;
 
-                       skb = build_skb(buf, priv->rx_frag_size);
+                       skb = napi_build_skb(buf, priv->rx_frag_size);
                        if (unlikely(!skb)) {
                                skb_free_frag(buf);
                                dev->stats.rx_dropped++;
@@ -468,7 +468,7 @@ static int bcm_enet_tx_reclaim(struct net_device *dev, int force)
                        dev->stats.tx_errors++;
 
                bytes += skb->len;
-               dev_kfree_skb(skb);
+               napi_consume_skb(skb, !force);
                released++;
        }