From d2cb6ce7306997c753976b65bf81495e1efe7074 Mon Sep 17 00:00:00 2001 From: Ajit Khaparde Date: Wed, 24 Apr 2013 11:53:08 +0000 Subject: [PATCH] be2net: Fix PVID tag offload for packets with inline VLAN tag. BE3 HW in UMC mode could wrongly double tag a packet with PVID when the packet already has a inlined VLAN tag. In UMC mode, When HW finds that a packet is already VLAN tagged PVID should not be inserted into the packet. To fix this use the FW hack to instruct the HW to skip PVID tagging. Signed-off-by: Ajit Khaparde Signed-off-by: David S. Miller --- drivers/net/ethernet/emulex/benet/be_main.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c index 21109b59fcfc..1232e9164bf1 100644 --- a/drivers/net/ethernet/emulex/benet/be_main.c +++ b/drivers/net/ethernet/emulex/benet/be_main.c @@ -834,6 +834,7 @@ static netdev_tx_t be_xmit(struct sk_buff *skb, u32 start = txq->head, eth_hdr_len; bool dummy_wrb, stopped = false; bool skip_hw_vlan = false; + struct vlan_ethhdr *veh = (struct vlan_ethhdr *)skb->data; eth_hdr_len = ntohs(skb->protocol) == ETH_P_8021Q ? VLAN_ETH_HLEN : ETH_HLEN; @@ -846,6 +847,13 @@ static netdev_tx_t be_xmit(struct sk_buff *skb, pskb_trim(skb, eth_hdr_len + ntohs(ip->tot_len)); } + /* If vlan tag is already inlined in the packet, skip HW VLAN + * tagging in UMC mode + */ + if ((adapter->function_mode & UMC_ENABLED) && + veh->h_vlan_proto == htons(ETH_P_8021Q)) + skip_hw_vlan = true; + /* HW has a bug wherein it will calculate CSUM for VLAN * pkts even though it is disabled. * Manually insert VLAN in pkt. -- GitLab