pkt_gen->last_ok was not set properly, so after the first burst
pktgen instead of allocating new packet, will reuse old one, advance
eth_type_trans further, which would mean the stack will be seeing very
short bogus packets.
Fixes: 62f64aed622b ("pktgen: introduce xmit_mode '<start_xmit|netif_receive>'") Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>