netdev - [PATCH net-next] net: allwinner: Fix use correct return type for ndo_start

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Date:   Tue, 5 May 2020 10:49:20 +0800
From:   wangyunjian <wangyunjian@...wei.com>
To:     <netdev@...r.kernel.org>
CC:     <davem@...emloft.net>, <jerry.lilijun@...wei.com>,
        <xudingke@...wei.com>, Yunjian Wang <wangyunjian@...wei.com>
Subject: [PATCH net-next] net: allwinner: Fix use correct return type for ndo_start_xmit()

From: Yunjian Wang <wangyunjian@...wei.com>

The method ndo_start_xmit() returns a value of type netdev_tx_t. Fix
the ndo function to use the correct type. And emac_start_xmit() can
leak one skb if 'channel' == 3.

Signed-off-by: Yunjian Wang <wangyunjian@...wei.com>
---
 drivers/net/ethernet/allwinner/sun4i-emac.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/allwinner/sun4i-emac.c b/drivers/net/ethernet/allwinner/sun4i-emac.c
index 18d3b43..b3b8a80 100644
--- a/drivers/net/ethernet/allwinner/sun4i-emac.c
+++ b/drivers/net/ethernet/allwinner/sun4i-emac.c
@@ -417,7 +417,7 @@ static void emac_timeout(struct net_device *dev, unsigned int txqueue)
 /* Hardware start transmission.
  * Send a packet to media from the upper layer.
  */
-static int emac_start_xmit(struct sk_buff *skb, struct net_device *dev)
+static netdev_tx_t emac_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct emac_board_info *db = netdev_priv(dev);
 	unsigned long channel;
@@ -425,7 +425,7 @@ static int emac_start_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	channel = db->tx_fifo_stat & 3;
 	if (channel == 3)
-		return 1;
+		return NETDEV_TX_BUSY;
 
 	channel = (channel == 1 ? 1 : 0);
 
-- 
1.8.3.1