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>

1 files changed, 1 insertions, 1 deletions

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;