net: ibm: fix return type of ndo_start_xmit function

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@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/ibm/ehea/ehea_main.c

@@ -2038,7 +2038,7 @@ static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
 	dev_consume_skb_any(skb);
 }
 
-static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
+static netdev_tx_t ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct ehea_port *port = netdev_priv(dev);
 	struct ehea_swqe *swqe;

drivers/net/ethernet/ibm/emac/core.c

@@ -1409,7 +1409,7 @@ static inline u16 emac_tx_csum(struct emac_instance *dev,
 	return 0;
 }
 
-static inline int emac_xmit_finish(struct emac_instance *dev, int len)
+static inline netdev_tx_t emac_xmit_finish(struct emac_instance *dev, int len)
 {
 	struct emac_regs __iomem *p = dev->emacp;
 	struct net_device *ndev = dev->ndev;
@@ -1436,7 +1436,7 @@ static inline int emac_xmit_finish(struct emac_instance *dev, int len)
 }
 
 /* Tx lock BH */
-static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
+static netdev_tx_t emac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 {
 	struct emac_instance *dev = netdev_priv(ndev);
 	unsigned int len = skb->len;
@@ -1494,7 +1494,8 @@ static inline int emac_xmit_split(struct emac_instance *dev, int slot,
 }
 
 /* Tx lock BH disabled (SG version for TAH equipped EMACs) */
-static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev)
+static netdev_tx_t
+emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev)
 {
 	struct emac_instance *dev = netdev_priv(ndev);
 	int nr_frags = skb_shinfo(skb)->nr_frags;

drivers/net/ethernet/ibm/ibmvnic.c

@@ -1428,7 +1428,7 @@ static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
 	return 0;
 }
 
-static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
+static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
 {
 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 	int queue_num = skb_get_queue_mapping(skb);
@@ -1452,7 +1452,7 @@ static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
 	u64 *handle_array;
 	int index = 0;
 	u8 proto = 0;
-	int ret = 0;
+	netdev_tx_t ret = NETDEV_TX_OK;
 
 	if (adapter->resetting) {
 		if (!netif_subqueue_stopped(netdev, skb))