From d932e04a5e7b146c5f9bf517714b986a432a7594 Mon Sep 17 00:00:00 2001
From: Patrick McHardy <kaber@trash.net>
Date: Sat, 10 Nov 2007 21:51:40 -0800
Subject: [PATCH] [VLAN]: Don't synchronize addresses while the vlan device is
 down

While the VLAN device is down, the unicast addresses are not configured
on the underlying device, so we shouldn't attempt to sync them.

Noticed by Dmitry Butskoy <buc@odusz.so-cdu.ru>

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/8021q/vlan.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index 1037748c14db..0fadbc6fbc3f 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -636,6 +636,10 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
 			if (!vlandev)
 				continue;
 
+			flgs = vlandev->flags;
+			if (!(flgs & IFF_UP))
+				continue;
+
 			vlan_sync_address(dev, vlandev);
 		}
 		break;
-- 
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