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[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>
This commit is contained in:
Tommy Christensen 2005-07-12 12:13:49 -07:00 committed by David S. Miller
parent ab611487d8
commit f4637b55ba
1 changed files with 8 additions and 0 deletions
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8
net/8021q/vlan.c
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@ -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;