net: remove check for headroom in vlan_dev_create

It is possible for the headroom to be smaller then the
hard_header_len for a short period of time after toggling
the vlan offload setting.

This is not a hard error and skb_cow_head is called in
__vlan_put_tag() to resolve this.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Acked-by: Jesse Gross <jesse@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 3 deletions

diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 14e3d1fa07a0..afb03c5a7adc 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -274,9 +274,6 @@ static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
         u16 vlan_tci = 0;
         int rc;
 
-        if (WARN_ON(skb_headroom(skb) < dev->hard_header_len))
-                return -ENOSPC;
-
         if (!(vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR)) {
                 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN);