[NET]: Wrap netdevice hardware header creation.

Add inline for common usage of hardware header creation, and
fix bug in IPV6 mcast where the assumption about negative return is
an errno. Negative return from hard_header means not enough space
was available,(ie -N bytes).

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 8 insertions, 8 deletions

diff --git a/drivers/net/hamradio/bpqether.c b/drivers/net/hamradio/bpqether.c
index c05bc37df356..4bff23e3b970 100644
--- a/drivers/net/hamradio/bpqether.c
+++ b/drivers/net/hamradio/bpqether.c
@@ -286,7 +286,7 @@ static int bpq_xmit(struct sk_buff *skb, struct net_device *dev)
 
         skb->protocol = ax25_type_trans(skb, dev);
         skb_reset_network_header(skb);
-        dev->hard_header(skb, dev, ETH_P_BPQ, bpq->dest_addr, NULL, 0);
+        dev_hard_header(skb, dev, ETH_P_BPQ, bpq->dest_addr, NULL, 0);
         bpq->stats.tx_packets++;
         bpq->stats.tx_bytes+=skb->len;
   
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 2f6cdaa88729..a22087ca968d 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -170,8 +170,8 @@ static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
         const struct macvlan_dev *vlan = netdev_priv(dev);
         struct net_device *lowerdev = vlan->lowerdev;
 
-        return lowerdev->hard_header(skb, lowerdev, type, daddr,
-                                     saddr ? : dev->dev_addr, len);
+        return dev_hard_header(skb, lowerdev, type, daddr,
+                               saddr ? : dev->dev_addr, len);
 }
 
 static int macvlan_open(struct net_device *dev)
diff --git a/drivers/net/pppoe.c b/drivers/net/pppoe.c
index d48b7b73d896..8936ed3469cf 100644
--- a/drivers/net/pppoe.c
+++ b/drivers/net/pppoe.c
@@ -834,8 +834,8 @@ static int pppoe_sendmsg(struct kiocb *iocb, struct socket *sock,
         }
 
         error = total_len;
-        dev->hard_header(skb, dev, ETH_P_PPP_SES,
-                         po->pppoe_pa.remote, NULL, total_len);
+        dev_hard_header(skb, dev, ETH_P_PPP_SES,
+                        po->pppoe_pa.remote, NULL, total_len);
 
         memcpy(ph, &hdr, sizeof(struct pppoe_hdr));
 
@@ -886,8 +886,8 @@ static int __pppoe_xmit(struct sock *sk, struct sk_buff *skb)
         skb->protocol = __constant_htons(ETH_P_PPP_SES);
         skb->dev = dev;
 
-        dev->hard_header(skb, dev, ETH_P_PPP_SES,
-                         po->pppoe_pa.remote, NULL, data_len);
+        dev_hard_header(skb, dev, ETH_P_PPP_SES,
+                        po->pppoe_pa.remote, NULL, data_len);
 
         dev_queue_xmit(skb);
 
diff --git a/drivers/net/wan/lapbether.c b/drivers/net/wan/lapbether.c
index 36e683ccae5e..fb37b8095231 100644
--- a/drivers/net/wan/lapbether.c
+++ b/drivers/net/wan/lapbether.c
@@ -216,7 +216,7 @@ static void lapbeth_data_transmit(struct net_device *ndev, struct sk_buff *skb)
 
         skb->dev = dev = lapbeth->ethdev;
 
-        dev->hard_header(skb, dev, ETH_P_DEC, bcast_addr, NULL, 0);
+        dev_hard_header(skb, dev, ETH_P_DEC, bcast_addr, NULL, 0);
 
         dev_queue_xmit(skb);
 }