[PATCH 2/3] net: vlan: handle NETDEV_CHANGEROOM events

["Florian Fainelli" <f.fainelli@gmail.com>]

Whenever the parent device has needed_headroom/needed_tailroom
requirement changes, the VLAN devices should also be updated to the new
value. Handle the NETDEV_CHANGEROOM events and just set the new headroom
and tailroom requirements to the values of the parent device.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 net/8021q/vlan.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index 61fc573..11a1faa 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -466,6 +466,13 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
 		vlan_group_for_each_dev(grp, i, vlandev)
 			call_netdevice_notifiers(event, vlandev);
 		break;
+
+	case NETDEV_CHANGEROOM:
+		vlan_group_for_each_dev(grp, i, vlandev) {
+			dev_set_headroom(vlandev, dev->needed_headroom);
+			dev_set_tailroom(vlandev, dev->needed_tailroom);
+		}
+		break;
 	}
 
 out:
-- 
1.8.1.2