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> --- drivers/net/usb/ipheth.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/usb/ipheth.c b/drivers/net/usb/ipheth.c index 7275761..53eab6fb 100644 --- a/drivers/net/usb/ipheth.c +++ b/drivers/net/usb/ipheth.c @@ -413,7 +413,7 @@ static int ipheth_close(struct net_device *net) return 0; } -static int ipheth_tx(struct sk_buff *skb, struct net_device *net) +static netdev_tx_t ipheth_tx(struct sk_buff *skb, struct net_device *net) { struct ipheth_device *dev = netdev_priv(net); struct usb_device *udev = dev->udev; -- 1.8.3.1