VLAN: kill_vid is only useful for VLAN filtering devices

The interface for network device VLAN extension was confusing.
The kill_vid function is only really useful for devices that do
hardware filtering. Devices that only do VLAN receiption without
filtering were being forced to provide the hook, and there were
bugs in those devices.

Many drivers had kill_vid routine that called vlan_group_set_device, with
NULL, but that is done already.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index bd93c45778d4eaf2d9e3534620da43a088217b10..ceef57c9ab3260737e4909ce83c1eddfb529b7e4 100644 (file)
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -240,10 +240,8 @@ static int unregister_vlan_dev(struct net_device *real_dev,
                         * interlock with HW accelerating devices or SW vlan
                         * input packet processing.
                         */
-                       if (real_dev->features &
-                           (NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER)) {
+                       if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
                                real_dev->vlan_rx_kill_vid(real_dev, vlan_id);
-                       }
 
                        vlan_group_set_device(grp, vlan_id, NULL);
                        synchronize_net();
@@ -409,16 +407,14 @@ static struct net_device *register_vlan_device(const char *eth_IF_name,
        }
 
        if ((real_dev->features & NETIF_F_HW_VLAN_RX) &&
-           (real_dev->vlan_rx_register == NULL ||
-            real_dev->vlan_rx_kill_vid == NULL)) {
+           !real_dev->vlan_rx_register) {
                printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n",
                        __FUNCTION__, real_dev->name);
                goto out_put_dev;
        }
 
        if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) &&
-           (real_dev->vlan_rx_add_vid == NULL ||
-            real_dev->vlan_rx_kill_vid == NULL)) {
+           (!real_dev->vlan_rx_add_vid || !real_dev->vlan_rx_kill_vid)) {
                printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n",
                        __FUNCTION__, real_dev->name);
                goto out_put_dev;