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>
diff --git a/drivers/net/wireless/ray_cs.c b/drivers/net/wireless/ray_cs.c
index 22e7185..b10b038 100644
--- a/drivers/net/wireless/ray_cs.c
+++ b/drivers/net/wireless/ray_cs.c
@@ -923,7 +923,7 @@
 
 	if (!(pcmcia_dev_present(link))) {
 		DEBUG(2, "ray_dev_start_xmit - device not present\n");
-		return -1;
+		return NETDEV_TX_LOCKED;
 	}
 	DEBUG(3, "ray_dev_start_xmit(skb=%p, dev=%p)\n", skb, dev);
 	if (local->authentication_state == NEED_TO_AUTH) {
@@ -931,7 +931,7 @@
 		if (!build_auth_frame(local, local->auth_id, OPEN_AUTH_REQUEST)) {
 			local->authentication_state = AUTHENTICATED;
 			netif_stop_queue(dev);
-			return 1;
+			return NETDEV_TX_BUSY;
 		}
 	}
 
@@ -944,7 +944,7 @@
 	case XMIT_NO_CCS:
 	case XMIT_NEED_AUTH:
 		netif_stop_queue(dev);
-		return 1;
+		return NETDEV_TX_BUSY;
 	case XMIT_NO_INTR:
 	case XMIT_MSG_BAD:
 	case XMIT_OK: