netdev - [PATCH v2 2/2] vlan: updates vlan real_num_tx

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Date:	Tue, 23 Mar 2010 17:42:05 -0700
From:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, gospo@...hat.com,
	Vasu Dev <vasu.dev@...el.com>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [PATCH v2 2/2] vlan: updates vlan real_num_tx_queues

From: Vasu Dev <vasu.dev@...el.com>

Updates real_num_tx_queues in case underlying real device
has changed real_num_tx_queues.

-v2
 As per Eric Dumazet<eric.dumazet@...il.com> comment:-
   -- adds BUG_ON to catch case of real_num_tx_queues exceeding num_tx_queues.
   -- created this self contained patch to just update real_num_tx_queues.

Signed-off-by: Vasu Dev <vasu.dev@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---

 net/8021q/vlan.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index 4535122..db783d7 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -378,6 +378,8 @@ static void vlan_transfer_features(struct net_device *dev,
 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
 	vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
 #endif
+	vlandev->real_num_tx_queues = dev->real_num_tx_queues;
+	BUG_ON(vlandev->real_num_tx_queues > vlandev->num_tx_queues);
 
 	if (old_features != vlandev->features)
 		netdev_features_change(vlandev);

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