When deriving the name from the real device, inherit the assign type, otherwise
set PREDICTABLE as the name will be uniquely determined by the VLANID.

Signed-off-by: Tom Gundersen <t...@jklm.no>
Cc: Patrick McHardy <ka...@trash.net>
---
 net/8021q/vlan.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index cba9c21..cf88f7b 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -212,6 +212,7 @@ static int register_vlan_device(struct net_device 
*real_dev, u16 vlan_id)
 {
        struct net_device *new_dev;
        struct vlan_dev_priv *vlan;
+       unsigned char name_assign_type;
        struct net *net = dev_net(real_dev);
        struct vlan_net *vn = net_generic(net, vlan_net_id);
        char name[IFNAMSIZ];
@@ -229,18 +230,21 @@ static int register_vlan_device(struct net_device 
*real_dev, u16 vlan_id)
        case VLAN_NAME_TYPE_RAW_PLUS_VID:
                /* name will look like:  eth1.0005 */
                snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id);
+               name_assign_type = real_dev->name_assign_type;
                break;
        case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
                /* Put our vlan.VID in the name.
                 * Name will look like:  vlan5
                 */
                snprintf(name, IFNAMSIZ, "vlan%i", vlan_id);
+               name_assign_type = NET_NAME_PREDICTABLE;
                break;
        case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
                /* Put our vlan.VID in the name.
                 * Name will look like:  eth0.5
                 */
                snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
+               name_assign_type = real_dev->name_assign_type;
                break;
        case VLAN_NAME_TYPE_PLUS_VID:
                /* Put our vlan.VID in the name.
@@ -248,10 +252,11 @@ static int register_vlan_device(struct net_device 
*real_dev, u16 vlan_id)
                 */
        default:
                snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
+               name_assign_type = NET_NAME_PREDICTABLE;
        }
 
        new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name,
-                              NET_NAME_UNKNOWN, vlan_setup);
+                              name_assign_type, vlan_setup);
 
        if (new_dev == NULL)
                return -ENOBUFS;
-- 
1.9.3

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