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Subject[PATCH] net: ag71xx: switch to napi_build_skb() to reuse skbuff_heads
Date
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>
---
drivers/net/ethernet/atheros/ag71xx.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/atheros/ag71xx.c b/drivers/net/ethernet/atheros/ag71xx.c
index cac509708e9d..5b6c4637349c 100644
--- a/drivers/net/ethernet/atheros/ag71xx.c
+++ b/drivers/net/ethernet/atheros/ag71xx.c
@@ -825,7 +825,7 @@ static int ag71xx_tx_packets(struct ag71xx *ag, bool flush)
if (!skb)
continue;

- dev_kfree_skb_any(skb);
+ napi_consume_skb(skb, !flush);
ring->buf[i].tx.skb = NULL;

bytes_compl += ring->buf[i].tx.len;
@@ -1657,7 +1657,7 @@ static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
ndev->stats.rx_packets++;
ndev->stats.rx_bytes += pktlen;

- skb = build_skb(ring->buf[i].rx.rx_buf, ag71xx_buffer_size(ag));
+ skb = napi_build_skb(ring->buf[i].rx.rx_buf, ag71xx_buffer_size(ag));
if (!skb) {
skb_free_frag(ring->buf[i].rx.rx_buf);
goto next;
--
2.17.1
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