netdev - [Patch net-next 09/11] net:fec: remove unnessary memory copy for address alignment in .xmit()

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Date:	Thu, 4 Sep 2014 04:34:44 +0800
From:	<y@...inux1.ap.freescale.net>
To:	<b38611@...escale.com>, <davem@...emloft.net>,
	<netdev@...r.kernel.org>, <lznuaa@...il.com>
CC:	<shawn.guo@...aro.org>, <linux-arm-kernel@...ts.infradead.org>,
	<devicetree@...r.kernel.org>, Fugang Duan <B38611@...escale.com>,
	Frank Li <Frank.Li@...escale.com>
Subject: [Patch net-next 09/11] net:fec: remove unnessary memory copy for address alignment in .xmit()

From: Fugang Duan <B38611@...escale.com>

i.MX6SX enet-avb IP support buffer address byte alignment for tx DMA
transfer, so remove the unnessary memory copy for the enet avb IP.

Signed-off-by: Fugang Duan <B38611@...escale.com>
Signed-off-by: Frank Li <Frank.Li@...escale.com>
---
 drivers/net/ethernet/freescale/fec_main.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index b388e29f..d09fe16 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -518,8 +518,9 @@ static int fec_enet_txq_submit_skb(struct fec_enet_priv_tx_q *txq,
 
 	queue = skb_get_queue_mapping(skb);
 	index = fec_enet_get_bd_index(txq->tx_bd_base, bdp, fep);
-	if (((unsigned long) bufaddr) & FEC_ALIGNMENT ||
-		id_entry->driver_data & FEC_QUIRK_SWAP_FRAME) {
+	if (!(id_entry->driver_data & FEC_QUIRK_HAS_AVB) &&
+	    ((((unsigned long)bufaddr) & FEC_ALIGNMENT ||
+		id_entry->driver_data & FEC_QUIRK_SWAP_FRAME))) {
 		memcpy(txq->tx_bounce[index], skb->data, buflen);
 		bufaddr = txq->tx_bounce[index];
 
-- 
1.9.1

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