aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet
diff options
context:
space:
mode:
authorHariprasad Shenai <hariprasad@chelsio.com>2016-07-28 13:28:57 +0530
committerDavid S. Miller <davem@davemloft.net>2016-07-30 20:39:59 -0700
commit8d09e6b8b9c9969ac59496dc21e10b67fe727e7e (patch)
tree44210434f0677d58165a5259929bb1d3a731db71 /drivers/net/ethernet
parentdrivers: net: phy: xgene: Remove redundant dev_err call in xgene_mdio_probe() (diff)
downloadlinux-dev-8d09e6b8b9c9969ac59496dc21e10b67fe727e7e.tar.xz
linux-dev-8d09e6b8b9c9969ac59496dc21e10b67fe727e7e.zip
cxgb4/cxgb4vf: Fixes regression in perf when tx vlan offload is disabled
The commit 637d3e997351 ("cxgb4: Discard the packet if the length is greater than mtu") introduced a regression in the VLAN interface performance when Tx VLAN offload is disabled. Check if skb is tagged, regardless of whether it is hardware accelerated or not. Presently we were checking only for hardware acclereated one, which caused performance to drop to ~0.17Mbps on a 10GbE adapter for VLAN interface, when tx vlan offload is turned off using ethtool. The ethernet head length calculation was going wrong in this case, and driver ended up dropping packets. Fixes: 637d3e997351 ("cxgb4: Discard the packet if the length is greater than mtu") Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
-rw-r--r--drivers/net/ethernet/chelsio/cxgb4/sge.c2
-rw-r--r--drivers/net/ethernet/chelsio/cxgb4vf/sge.c2
2 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb4/sge.c b/drivers/net/ethernet/chelsio/cxgb4/sge.c
index bad253beb8c8..ad3552df0545 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/sge.c
@@ -1192,7 +1192,7 @@ out_free: dev_kfree_skb_any(skb);
/* Discard the packet if the length is greater than mtu */
max_pkt_len = ETH_HLEN + dev->mtu;
- if (skb_vlan_tag_present(skb))
+ if (skb_vlan_tagged(skb))
max_pkt_len += VLAN_HLEN;
if (!skb_shinfo(skb)->gso_size && (unlikely(skb->len > max_pkt_len)))
goto out_free;
diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/sge.c b/drivers/net/ethernet/chelsio/cxgb4vf/sge.c
index 1bb57d3fbbe8..c8fd4f8fe1fa 100644
--- a/drivers/net/ethernet/chelsio/cxgb4vf/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4vf/sge.c
@@ -1188,7 +1188,7 @@ int t4vf_eth_xmit(struct sk_buff *skb, struct net_device *dev)
/* Discard the packet if the length is greater than mtu */
max_pkt_len = ETH_HLEN + dev->mtu;
- if (skb_vlan_tag_present(skb))
+ if (skb_vlan_tagged(skb))
max_pkt_len += VLAN_HLEN;
if (!skb_shinfo(skb)->gso_size && (unlikely(skb->len > max_pkt_len)))
goto out_free;