net: use NETDEV_TX_OK instead of 0 in ndo_start_xmit() functions

This patch is the result of an automatic spatch transformation to convert
all ndo_start_xmit() return values of 0 to NETDEV_TX_OK.

Some occurences are missed by the automatic conversion, those will be
handled in a seperate patch.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wireless/airo.c b/drivers/net/wireless/airo.c
index c70604f..49f3139 100644
--- a/drivers/net/wireless/airo.c
+++ b/drivers/net/wireless/airo.c
@@ -1927,7 +1927,7 @@
 
 	if (!skb) {
 		airo_print_err(dev->name, "%s: skb == NULL!",__func__);
-		return 0;
+		return NETDEV_TX_OK;
 	}
 	npacks = skb_queue_len (&ai->txq);
 
@@ -1938,7 +1938,7 @@
 			return NETDEV_TX_BUSY;
 		}
 		skb_queue_tail (&ai->txq, skb);
-		return 0;
+		return NETDEV_TX_OK;
 	}
 
 	spin_lock_irqsave(&ai->aux_lock, flags);
@@ -1951,7 +1951,7 @@
 		set_bit(FLAG_PENDING_XMIT, &ai->flags);
 		mpi_send_packet (dev);
 	}
-	return 0;
+	return NETDEV_TX_OK;
 }
 
 /*
@@ -2127,7 +2127,7 @@
 
 	if ( skb == NULL ) {
 		airo_print_err(dev->name, "%s: skb == NULL!", __func__);
-		return 0;
+		return NETDEV_TX_OK;
 	}
 
 	/* Find a vacant FID */
@@ -2155,7 +2155,7 @@
 		wake_up_interruptible(&priv->thr_wait);
 	} else
 		airo_end_xmit(dev);
-	return 0;
+	return NETDEV_TX_OK;
 }
 
 static void airo_end_xmit11(struct net_device *dev) {
@@ -2199,7 +2199,7 @@
 
 	if ( skb == NULL ) {
 		airo_print_err(dev->name, "%s: skb == NULL!", __func__);
-		return 0;
+		return NETDEV_TX_OK;
 	}
 
 	/* Find a vacant FID */
@@ -2227,7 +2227,7 @@
 		wake_up_interruptible(&priv->thr_wait);
 	} else
 		airo_end_xmit11(dev);
-	return 0;
+	return NETDEV_TX_OK;
 }
 
 static void airo_read_stats(struct net_device *dev)