[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>

diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index 1037748c14db0dbaee28ed4709eed462061a68d8..0fadbc6fbc3f504c0c2cb4064fe3d2730ced8e6b 100644 (file)
--- 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;