[PATCH 4.14 111/190] net: allwinner: Fix use correct return type for ndo_start_xmit()

Greg Kroah-Hartman
2020-06-19T16:35:41Z

From: Yunjian Wang <wangyunjian@huawei.com>

[ Upstream commit 09f6c44aaae0f1bdb8b983d7762676d5018c53bc ]

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@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 3143de45baaa..c458b81ba63a 100644
--- a/drivers/net/ethernet/allwinner/sun4i-emac.c
+++ b/drivers/net/ethernet/allwinner/sun4i-emac.c
@@ -433,7 +433,7 @@ static void emac_timeout(struct net_device *dev)
/* 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;
@@ -441,7 +441,7 @@ 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);

--
2.25.1