diff options
| -rw-r--r-- | drivers/net/chelsio/sge.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/drivers/net/chelsio/sge.c b/drivers/net/chelsio/sge.c index 9911048d821..0ca8d876e16 100644 --- a/drivers/net/chelsio/sge.c +++ b/drivers/net/chelsio/sge.c @@ -1778,7 +1778,9 @@ static int t1_sge_tx(struct sk_buff *skb, struct adapter *adapter, struct cmdQ *q = &sge->cmdQ[qid]; unsigned int credits, pidx, genbit, count, use_sched_skb = 0; - spin_lock(&q->lock); + if (!spin_trylock(&q->lock)) + return NETDEV_TX_LOCKED; + reclaim_completed_tx(sge, q); pidx = q->pidx; @@ -1887,6 +1889,8 @@ int t1_start_xmit(struct sk_buff *skb, struct net_device *dev) struct sge *sge = adapter->sge; struct sge_port_stats *st = per_cpu_ptr(sge->port_stats[dev->if_port], smp_processor_id()); struct cpl_tx_pkt *cpl; + struct sk_buff *orig_skb = skb; + int ret; if (skb->protocol == htons(ETH_P_CPL5)) goto send; @@ -1930,8 +1934,6 @@ int t1_start_xmit(struct sk_buff *skb, struct net_device *dev) * Complain when this happens but try to fix things up. */ if (unlikely(skb_headroom(skb) < dev->hard_header_len - ETH_HLEN)) { - struct sk_buff *orig_skb = skb; - pr_debug("%s: headroom %d header_len %d\n", dev->name, skb_headroom(skb), dev->hard_header_len); @@ -1991,7 +1993,16 @@ int t1_start_xmit(struct sk_buff *skb, struct net_device *dev) send: st->tx_packets++; dev->trans_start = jiffies; - return t1_sge_tx(skb, adapter, 0, dev); + ret = t1_sge_tx(skb, adapter, 0, dev); + + /* If transmit busy, and we reallocated skb's due to headroom limit, + * then silently discard to avoid leak. + */ + if (unlikely(ret != NETDEV_TX_OK && skb != orig_skb)) { + dev_kfree_skb_any(skb); + ret = NETDEV_TX_OK; + } + return ret; } /* |