After the packet is successfully sent, we should not touch the skb 
as it may have been freed. This patch is based on the work done by 
Long Li <lon...@microsoft.com>.

In this version of the patch I have fixed issues pointed out by David.
David, please queue this up for stable.

Signed-off-by: K. Y. Srinivasan <k...@microsoft.com>
Tested-by: Long Li <lon...@microsoft.com>
---
 drivers/net/hyperv/netvsc_drv.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index a9c5eaa..0fcb5e7 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -387,6 +387,7 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct 
net_device *net)
        int  hdr_offset;
        u32 net_trans_info;
        u32 hash;
+       u32 skb_length = skb->len;
 
 
        /* We will atmost need two pages to describe the rndis
@@ -562,7 +563,7 @@ do_send:
 
 drop:
        if (ret == 0) {
-               net->stats.tx_bytes += skb->len;
+               net->stats.tx_bytes += skb_length;
                net->stats.tx_packets++;
        } else {
                kfree(packet);
-- 
1.7.4.1

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