diff options
| author | Eric Dumazet <eric.dumazet@gmail.com> | 2011-10-24 07:53:03 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-10-24 22:40:14 (GMT) |
| commit | 48855432047c9de7ea9987349de4c47d48ade8d1 (patch) | |
| tree | 6c6d7d05c62f3426e288089bbeb33a1f45520b07 | |
| parent | 752961a11e847e604aeaaa798cac438c1e671ba4 (diff) | |
| download | linux-48855432047c9de7ea9987349de4c47d48ade8d1.tar.xz | |
|PATCH net-next] tg3: add tx_dropped counter
If a frame cant be transmitted, it is silently discarded.
Add a counter to report these errors to user.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/broadcom/tg3.c | 23 | ||||
| -rw-r--r-- | drivers/net/ethernet/broadcom/tg3.h | 1 |
2 files changed, 12 insertions, 12 deletions
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c index b865e9f..161cbbb 100644 --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -6671,10 +6671,8 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, struct net_device *dev) u32 tcp_opt_len, hdr_len; if (skb_header_cloned(skb) && - pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) { - dev_kfree_skb(skb); - goto out_unlock; - } + pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) + goto drop; iph = ip_hdr(skb); tcp_opt_len = tcp_optlen(skb); @@ -6746,10 +6744,9 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, struct net_device *dev) len = skb_headlen(skb); mapping = pci_map_single(tp->pdev, skb->data, len, PCI_DMA_TODEVICE); - if (pci_dma_mapping_error(tp->pdev, mapping)) { - dev_kfree_skb(skb); - goto out_unlock; - } + if (pci_dma_mapping_error(tp->pdev, mapping)) + goto drop; + tnapi->tx_buffers[entry].skb = skb; dma_unmap_addr_set(&tnapi->tx_buffers[entry], mapping, mapping); @@ -6805,7 +6802,7 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, struct net_device *dev) budget = tg3_tx_avail(tnapi); if (tigon3_dma_hwbug_workaround(tnapi, &skb, &entry, &budget, base_flags, mss, vlan)) - goto out_unlock; + goto drop_nofree; } skb_tx_timestamp(skb); @@ -6827,15 +6824,16 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, struct net_device *dev) netif_tx_wake_queue(txq); } -out_unlock: mmiowb(); - return NETDEV_TX_OK; dma_error: tg3_tx_skb_unmap(tnapi, tnapi->tx_prod, i); - dev_kfree_skb(skb); tnapi->tx_buffers[tnapi->tx_prod].skb = NULL; +drop: + dev_kfree_skb(skb); +drop_nofree: + tp->tx_dropped++; return NETDEV_TX_OK; } @@ -10009,6 +10007,7 @@ static struct rtnl_link_stats64 *tg3_get_stats64(struct net_device *dev, get_stat64(&hw_stats->rx_discards); stats->rx_dropped = tp->rx_dropped; + stats->tx_dropped = tp->tx_dropped; return stats; } diff --git a/drivers/net/ethernet/broadcom/tg3.h b/drivers/net/ethernet/broadcom/tg3.h index d2976f3..f32f288 100644 --- a/drivers/net/ethernet/broadcom/tg3.h +++ b/drivers/net/ethernet/broadcom/tg3.h @@ -2990,6 +2990,7 @@ struct tg3 { /* begin "everything else" cacheline(s) section */ unsigned long rx_dropped; + unsigned long tx_dropped; struct rtnl_link_stats64 net_stats_prev; struct tg3_ethtool_stats estats; struct tg3_ethtool_stats estats_prev; |