From: Josh Triplett pktgen currently only works on network devices with type ARPHRD_ETHER. Add support for the loopback device, type ARPHRD_LOOPBACK. I've tested this on my system, using a modified pktgen.conf-1-1 with s/eth1/lo/g, and it works fine; the network device statistics confirm packet transmission and receipt. Thanks to Sarah Bailey for discovering and tracking down the problem. Signed-off-by: Josh Triplett Signed-off-by: Andrew Morton --- net/core/pktgen.c | 2 +- 1 files changed, 1 insertion(+), 1 deletion(-) diff -puN net/core/pktgen.c~allow-pktgen-to-work-with-loopback-devices net/core/pktgen.c --- a/net/core/pktgen.c~allow-pktgen-to-work-with-loopback-devices +++ a/net/core/pktgen.c @@ -1930,7 +1930,7 @@ static struct net_device *pktgen_setup_d printk("pktgen: no such netdevice: \"%s\"\n", pkt_dev->ifname); goto out; } - if (odev->type != ARPHRD_ETHER) { + if (odev->type != ARPHRD_LOOPBACK && odev->type != ARPHRD_ETHER) { printk("pktgen: not an ethernet device: \"%s\"\n", pkt_dev->ifname); goto out_put; _