Subject: [PATCH] [NIU] VLAN does not work with niu driver

From: Joyce Yu <[email-masked]>
Date: Mon, 12 Oct 2009 22:41:36 -0700

From 0bb77e878758bd72051577bcc568e2b95c87c203 Mon Sep 17 00:00:00 2001
From: Joyce Yu <[email-masked]>
Date: Mon, 12 Oct 2009 11:03:54 -0700
Subject: [PATCH] VLAN does not work with niu driver
Signed-off-by: Joyce Yu <[email-masked]>

---
 drivers/net/niu.c |   11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/drivers/net/niu.c b/drivers/net/niu.c
index f9364d0..9559e42 100644
--- a/drivers/net/niu.c
+++ b/drivers/net/niu.c
@@ -3480,6 +3480,7 @@ static int niu_process_rx_pkt(struct napi_struct 
*napi, struct niu *np,
        unsigned int index = rp->rcr_index;
        struct sk_buff *skb;
        int len, num_rcr;
+       struct vlan_ethhdr *veth;

        skb = netdev_alloc_skb(np->dev, RX_SKB_ALLOC_SIZE);
        if (unlikely(!skb))
@@ -3545,7 +3546,15 @@ static int niu_process_rx_pkt(struct napi_struct 
*napi, struct niu *np,
        rp->rcr_index = index;

        skb_reserve(skb, NET_IP_ALIGN);
-       __pskb_pull_tail(skb, min(len, NIU_RXPULL_MAX));
+       __pskb_pull_tail(skb, min(len, VLAN_ETH_HLEN));
+
+       veth = (struct vlan_ethhdr *)skb->data;
+       if (veth->h_vlan_proto != __constant_htons(ETH_P_8021Q)) {
+               skb->tail -= 4;
+               skb->data_len += 4;
+               skb_shinfo(skb)->frags[0].page_offset -= 4;
+               skb_shinfo(skb)->frags[0].size += 4;
+       }

        rp->rx_packets++;
        rp->rx_bytes += skb->len;
--
1.6.4

--