net: use symbolic values for ndo_start_xmit() return codes

Convert magic values 1 and -1 to NETDEV_TX_BUSY and NETDEV_TX_LOCKED respectively.

0 (NETDEV_TX_OK) is not changed to keep the noise down, except in very few cases
where its in direct proximity to one of the other values.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 4 insertions, 4 deletions

diff --git a/drivers/net/hamradio/baycom_epp.c b/drivers/net/hamradio/baycom_epp.c
index bb78c11559cd..5e4b7afd0683 100644
--- a/drivers/net/hamradio/baycom_epp.c
+++ b/drivers/net/hamradio/baycom_epp.c
@@ -777,7 +777,7 @@ static int baycom_send_packet(struct sk_buff *skb, struct net_device *dev)
                 return 0;
         }
         if (bc->skb)
-                return -1;
+                return NETDEV_TX_LOCKED;
         /* strip KISS byte */
         if (skb->len >= HDLCDRV_MAXFLEN+1 || skb->len < 3) {
                 dev_kfree_skb(skb);
diff --git a/drivers/net/hamradio/hdlcdrv.c b/drivers/net/hamradio/hdlcdrv.c
index 61de56e45eed..d034f8ca63cb 100644
--- a/drivers/net/hamradio/hdlcdrv.c
+++ b/drivers/net/hamradio/hdlcdrv.c
@@ -409,7 +409,7 @@ static int hdlcdrv_send_packet(struct sk_buff *skb, struct net_device *dev)
                 return 0;
         }
         if (sm->skb)
-                return -1;
+                return NETDEV_TX_LOCKED;
         netif_stop_queue(dev);
         sm->skb = skb;
         return 0;
diff --git a/drivers/net/hamradio/mkiss.c b/drivers/net/hamradio/mkiss.c
index 032c0db4c410..fda2fc83e9a1 100644
--- a/drivers/net/hamradio/mkiss.c
+++ b/drivers/net/hamradio/mkiss.c
@@ -531,7 +531,7 @@ static int ax_xmit(struct sk_buff *skb, struct net_device *dev)
 
         if (!netif_running(dev))  {
                 printk(KERN_ERR "mkiss: %s: xmit call when iface is down\n", dev->name);
-                return 1;
+                return NETDEV_TX_BUSY;
         }
 
         if (netif_queue_stopped(dev)) {
@@ -541,7 +541,7 @@ static int ax_xmit(struct sk_buff *skb, struct net_device *dev)
                  */
                 if (time_before(jiffies, dev->trans_start + 20 * HZ)) {
                         /* 20 sec timeout not reached */
-                        return 1;
+                        return NETDEV_TX_BUSY;
                 }
 
                 printk(KERN_ERR "mkiss: %s: transmit timed out, %s?\n", dev->name,