The method ndo_start_xmit() is defined as returning an 'netdev_tx_t', which is a typedef for an enum type, so make sure the implementation in this driver has returns 'netdev_tx_t' value, and change the function return type to netdev_tx_t. Found by coccinelle. Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx> --- net/l2tp/l2tp_eth.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/l2tp/l2tp_eth.c b/net/l2tp/l2tp_eth.c index 8aadc4f..4173cb1 100644 --- a/net/l2tp/l2tp_eth.c +++ b/net/l2tp/l2tp_eth.c @@ -77,7 +77,8 @@ static void l2tp_eth_dev_uninit(struct net_device *dev) */ } -static int l2tp_eth_dev_xmit(struct sk_buff *skb, struct net_device *dev) +static netdev_tx_t +l2tp_eth_dev_xmit(struct sk_buff *skb, struct net_device *dev) { struct l2tp_eth *priv = netdev_priv(dev); struct l2tp_session *session = priv->session; -- 1.8.3.1