[PATCH] chelsio: transmit routine return values

The Chelsio driver does not return the correct values from
the transmit routine. It works because the values don't conflict,
but it is using the wrong defines. And -ENOMEM is not a legal return
value.

Since t1_sge_tx is only called in one place, making it static
allows compiler to be potentially inline it.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

drivers/net/chelsio/sge.c

@@ -1332,8 +1332,8 @@ intr_handler_t t1_select_intr_handler(adapter_t *adapter)
  *
  * This runs with softirqs disabled.
  */
-unsigned int t1_sge_tx(struct sk_buff *skb, struct adapter *adapter,
-		       unsigned int qid, struct net_device *dev)
+static int t1_sge_tx(struct sk_buff *skb, struct adapter *adapter,
+		     unsigned int qid, struct net_device *dev)
 {
 	struct sge *sge = adapter->sge;
 	struct cmdQ *q = &sge->cmdQ[qid];
@@ -1352,9 +1352,10 @@ unsigned int t1_sge_tx(struct sk_buff *skb, struct adapter *adapter,
 			set_bit(dev->if_port, &sge->stopped_tx_queues);
 			sge->stats.cmdQ_full[3]++;
 			spin_unlock(&q->lock);
-			CH_ERR("%s: Tx ring full while queue awake!\n",
-			       adapter->name);
-			return 1;
+			if (!netif_queue_stopped(dev))
+				CH_ERR("%s: Tx ring full while queue awake!\n",
+				       adapter->name);
+			return NETDEV_TX_BUSY;
 		}
 		if (unlikely(credits - count < q->stop_thres)) {
 			sge->stats.cmdQ_full[3]++;
@@ -1389,7 +1390,7 @@ unsigned int t1_sge_tx(struct sk_buff *skb, struct adapter *adapter,
 			writel(F_CMDQ0_ENABLE, adapter->regs + A_SG_DOORBELL);
 		}
 	}
-	return 0;
+	return NETDEV_TX_OK;
 }
 
 #define MK_ETH_TYPE_MSS(type, mss) (((mss) & 0x3FFF) | ((type) << 14))
@@ -1449,7 +1450,7 @@ int t1_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		if (unlikely(skb->len < ETH_HLEN ||
 			     skb->len > dev->mtu + eth_hdr_len(skb->data))) {
 			dev_kfree_skb_any(skb);
-			return NET_XMIT_SUCCESS;
+			return NETDEV_TX_OK;
 		}
 
 		/*
@@ -1467,7 +1468,7 @@ int t1_start_xmit(struct sk_buff *skb, struct net_device *dev)
 			skb = skb_realloc_headroom(skb, sizeof(*cpl));
 			dev_kfree_skb_any(orig_skb);
 			if (!skb)
-				return -ENOMEM;
+				return NETDEV_TX_OK;
 		}
 
 		if (!(adapter->flags & UDP_CSUM_CAPABLE) &&
@@ -1475,7 +1476,7 @@ int t1_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		    skb->nh.iph->protocol == IPPROTO_UDP)
 			if (unlikely(skb_checksum_help(skb, 0))) {
 				dev_kfree_skb_any(skb);
-				return -ENOMEM;
+				return NETDEV_TX_OK;
 			}
 
 		/* Hmmm, assuming to catch the gratious arp... and we'll use

drivers/net/chelsio/sge.h

@@ -89,8 +89,6 @@ int t1_sge_configure(struct sge *, struct sge_params *);
 int t1_sge_set_coalesce_params(struct sge *, struct sge_params *);
 void t1_sge_destroy(struct sge *);
 intr_handler_t t1_select_intr_handler(adapter_t *adapter);
-unsigned int t1_sge_tx(struct sk_buff *skb, struct adapter *adapter,
-		       unsigned int qid, struct net_device *netdev);
 int t1_start_xmit(struct sk_buff *skb, struct net_device *dev);
 void t1_set_vlan_accel(struct adapter *adapter, int on_off);
 void t1_sge_start(struct sge *);