diff options
| author | Divy Le Ray <divy@chelsio.com> | 2007-11-27 21:30:09 (GMT) |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-12-01 21:32:31 (GMT) |
| commit | 7832ee034b6ef78aab020c9ec1348544cd65ccbd (patch) | |
| tree | 9a4fedc9bf3b6b9c31f35a50f3d7aa0deab358d4 /drivers/net/chelsio/sge.c | |
| parent | bd0ceaab86d3f0e3916b3b7868cfe20de490eebc (diff) | |
| download | linux-7832ee034b6ef78aab020c9ec1348544cd65ccbd.tar.xz | |
cxgb - fix T2 GSO
The patch ensures that a GSO skb has enough headroom
to push an encapsulating cpl_tx_pkt_lso header.
Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/chelsio/sge.c')
| -rwxr-xr-x[-rw-r--r--] | drivers/net/chelsio/sge.c | 34 |
1 files changed, 15 insertions, 19 deletions
diff --git a/drivers/net/chelsio/sge.c b/drivers/net/chelsio/sge.c index 4436662..e8b1036 100644..100755 --- a/drivers/net/chelsio/sge.c +++ b/drivers/net/chelsio/sge.c @@ -991,6 +991,7 @@ void t1_sge_get_port_stats(const struct sge *sge, int port, ss->tx_packets += st->tx_packets; ss->tx_cso += st->tx_cso; ss->tx_tso += st->tx_tso; + ss->tx_need_hdrroom += st->tx_need_hdrroom; ss->vlan_xtract += st->vlan_xtract; ss->vlan_insert += st->vlan_insert; } @@ -1848,7 +1849,8 @@ int t1_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct adapter *adapter = dev->priv; struct sge *sge = adapter->sge; - struct sge_port_stats *st = per_cpu_ptr(sge->port_stats[dev->if_port], smp_processor_id()); + 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; @@ -1856,6 +1858,18 @@ int t1_start_xmit(struct sk_buff *skb, struct net_device *dev) if (skb->protocol == htons(ETH_P_CPL5)) goto send; + /* + * We are using a non-standard hard_header_len. + * Allocate more header room in the rare cases it is not big enough. + */ + if (unlikely(skb_headroom(skb) < dev->hard_header_len - ETH_HLEN)) { + skb = skb_realloc_headroom(skb, sizeof(struct cpl_tx_pkt_lso)); + ++st->tx_need_hdrroom; + dev_kfree_skb_any(orig_skb); + if (!skb) + return NETDEV_TX_OK; + } + if (skb_shinfo(skb)->gso_size) { int eth_type; struct cpl_tx_pkt_lso *hdr; @@ -1889,24 +1903,6 @@ int t1_start_xmit(struct sk_buff *skb, struct net_device *dev) return NETDEV_TX_OK; } - /* - * We are using a non-standard hard_header_len and some kernel - * components, such as pktgen, do not handle it right. - * Complain when this happens but try to fix things up. - */ - if (unlikely(skb_headroom(skb) < dev->hard_header_len - ETH_HLEN)) { - pr_debug("%s: headroom %d header_len %d\n", dev->name, - skb_headroom(skb), dev->hard_header_len); - - if (net_ratelimit()) - printk(KERN_ERR "%s: inadequate headroom in " - "Tx packet\n", dev->name); - skb = skb_realloc_headroom(skb, sizeof(*cpl)); - dev_kfree_skb_any(orig_skb); - if (!skb) - return NETDEV_TX_OK; - } - if (!(adapter->flags & UDP_CSUM_CAPABLE) && skb->ip_summed == CHECKSUM_PARTIAL && ip_hdr(skb)->protocol == IPPROTO_UDP) { |