path: root/net/dsa
diff options
authorGuenter Roeck <linux@roeck-us.net>2014-10-29 10:44:53 -0700
committerDavid S. Miller <davem@davemloft.net>2014-10-30 14:54:10 -0400
commit734cbb5b6bf9ee42ab4d71690fabf486b1f44502 (patch)
treed1bde24176732ff95d9ef9ecf6407a2edcb17beb /net/dsa
parent75fbfd33234a71556bec34b099d98f970190905d (diff)
net: dsa: Don't set skb->protocol on outgoing tagged packets
Setting skb->protocol to a private protocol type may result in warning messages such as e1000e 0000:00:19.0 em1: checksum_partial proto=dada! This happens if the L3 protocol is IP or IPv6 and skb->ip_summed is set to CHECKSUM_PARTIAL. Looking through the code, it appears that changing skb->protocol for transmitted packets is not necessary and may actually be harmful. For example, it prevents purposely unmodified (from a DSA perspective) network drivers from properly setting up their transmit checksum offload pointers since they inspect skb->protocol to set up the IPv4 header or IPv6 header pointers. So don't unnecessarily change the protocol field. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dsa')
3 files changed, 0 insertions, 6 deletions
diff --git a/net/dsa/tag_dsa.c b/net/dsa/tag_dsa.c
index ce90c8bdc658..2dab27063273 100644
--- a/net/dsa/tag_dsa.c
+++ b/net/dsa/tag_dsa.c
@@ -63,8 +63,6 @@ static netdev_tx_t dsa_xmit(struct sk_buff *skb, struct net_device *dev)
dsa_header[3] = 0x00;
- skb->protocol = htons(ETH_P_DSA);
skb->dev = p->parent->dst->master_netdev;
diff --git a/net/dsa/tag_edsa.c b/net/dsa/tag_edsa.c
index 94fcce778679..9aeda596f7ec 100644
--- a/net/dsa/tag_edsa.c
+++ b/net/dsa/tag_edsa.c
@@ -76,8 +76,6 @@ static netdev_tx_t edsa_xmit(struct sk_buff *skb, struct net_device *dev)
edsa_header[7] = 0x00;
- skb->protocol = htons(ETH_P_EDSA);
skb->dev = p->parent->dst->master_netdev;
diff --git a/net/dsa/tag_trailer.c b/net/dsa/tag_trailer.c
index 115fdca34077..e268f9db8893 100644
--- a/net/dsa/tag_trailer.c
+++ b/net/dsa/tag_trailer.c
@@ -57,8 +57,6 @@ static netdev_tx_t trailer_xmit(struct sk_buff *skb, struct net_device *dev)
trailer[2] = 0x10;
trailer[3] = 0x00;
- nskb->protocol = htons(ETH_P_TRAILER);
nskb->dev = p->parent->dst->master_netdev;

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