commit ea3349a03519dcd4f32d949cd80ab995623dc5ac
author Martin KaFai Lau <kafai@fb.com> Wed Dec 07 15:53:13 2016 -0800
committer David S. Miller <davem@davemloft.net> Thu Dec 08 14:25:13 2016 -0500
tree 01d77dc1b6492c486e3df0503fc4b1ef17fb7884
parent b45f0674b997ee769907d6092dfa9ee8f59bb51d

mlx4: xdp: Reserve headroom for receiving packet when XDP prog is active

Reserve XDP_PACKET_HEADROOM for packet and enable bpf_xdp_adjust_head()
support.  This patch only affects the code path when XDP is active.

After testing, the tx_dropped counter is incremented if the xdp_prog sends
more than wire MTU.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>