From: Tommy Christensen <tommy.christensen@tpack.net>
Date: Tue, 12 Jul 2005 19:13:49 +0000 (-0700)
Subject: [VLAN]: Fix early vlan adding leads to not functional device
X-Git-Tag: v2.6.13-rc3~61^2
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=f4637b55ba960d9987a836617271659e9b7b0de8;p=linux-2.6-omap-h63xx.git

[VLAN]: Fix early vlan adding leads to not functional device

OK, I can see what's happening here. eth0 doesn't detect link-up until
after a few seconds, so when the vlan interface is opened immediately
after eth0 has been opened, it inherits the link-down state. Subsequently
the vlan interface is never properly activated and are thus unable to
transmit any packets.

dev->state bits are not supposed to be manipulated directly. Something
similar is probably needed for the netif_device_present() bit, although
I don't know how this is meant to work for a virtual device.

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index 1f6d31670bc..91e412b0ab0 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -578,6 +578,14 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
 			if (!vlandev)
 				continue;
 
+			if (netif_carrier_ok(dev)) {
+				if (!netif_carrier_ok(vlandev))
+					netif_carrier_on(vlandev);
+			} else {
+				if (netif_carrier_ok(vlandev))
+					netif_carrier_off(vlandev);
+			}
+
 			if ((vlandev->state & VLAN_LINK_STATE_MASK) != flgs) {
 				vlandev->state = (vlandev->state &~ VLAN_LINK_STATE_MASK) 
 					| flgs;