From 8edb98f38b17e10d64f87b0eafd2612597896a82 Mon Sep 17 00:00:00 2001
From: Alexander Duyck <alexander.h.duyck@intel.com>
Date: Tue, 23 Mar 2010 18:35:18 +0000
Subject: [PATCH] igb: only use vlan_gro_receive if vlans are registered

commit 31b24b955c3ebbb6f3008a6374e61cf7c05a193c upstream.

This change makes it so that vlan_gro_receive is only used if vlans have been
registered to the adapter structure.  Previously we were just sending all vlan
tagged frames in via this function but this results in a null pointer
dereference when vlans are not registered.

[ This fixes bugzilla entry 15582 -Eric Dumazet]

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 drivers/net/igb/igb_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 8111776927ae..9e3d87abb9ac 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -4560,7 +4560,7 @@ static void igb_receive_skb(struct igb_ring *ring, u8 status,
 	bool vlan_extracted = (adapter->vlgrp && (status & E1000_RXD_STAT_VP));
 
 	skb_record_rx_queue(skb, ring->queue_index);
-	if (vlan_extracted)
+	if (vlan_extracted && adapter->vlgrp)
 		vlan_gro_receive(&ring->napi, adapter->vlgrp,
 		                 le16_to_cpu(rx_desc->wb.upper.vlan),
 		                 skb);
-- 
2.34.1