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authorEric Dumazet <eric.dumazet@gmail.com>2011-10-24 07:53:03 +0000
committerDavid S. Miller <davem@davemloft.net>2011-10-24 18:40:14 -0400
commit48855432047c9de7ea9987349de4c47d48ade8d1 (patch)
tree6c6d7d05c62f3426e288089bbeb33a1f45520b07 /drivers/net/ethernet
parent752961a11e847e604aeaaa798cac438c1e671ba4 (diff)
downloadvexpress-lsk-48855432047c9de7ea9987349de4c47d48ade8d1.tar.gz
|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>
Diffstat (limited to 'drivers/net/ethernet')
-rw-r--r--drivers/net/ethernet/broadcom/tg3.c23
-rw-r--r--drivers/net/ethernet/broadcom/tg3.h1
2 files changed, 12 insertions, 12 deletions
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index b865e9fdd08..161cbbb4814 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 d2976f39b2f..f32f288134c 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;