6lowpan: get extra headroom in allocated frame

Use netdev_alloc_skb_ip_align() instead of alloc_skb() to get some
extra headroom in case we need to forward this frame in a tunnel or
something else.

Signed-off-by: Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index b872515..ae3f4eb 100644 (file)
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -661,8 +661,8 @@ lowpan_alloc_new_frame(struct sk_buff *skb, u8 iphc0, u8 len, u8 tag)
        frame->tag = tag;
 
        /* allocate buffer for frame assembling */
-       frame->skb = alloc_skb(frame->length +
-                              sizeof(struct ipv6hdr), GFP_ATOMIC);
+       frame->skb = netdev_alloc_skb_ip_align(skb->dev, frame->length +
+                                              sizeof(struct ipv6hdr));
 
        if (!frame->skb)
                goto skb_err;