On Fri, 05 May 2023 11:42:44 -0400 Chuck Lever <cel@xxxxxxxxxx> wrote: > From: Chuck Lever <chuck.lever@xxxxxxxxxx> > > A non-zero MAC address enables a network device to be assigned as > the underlying device for a virtual RDMA device. Without a non- > zero MAC address, cma_acquire_dev_by_src_ip() is unable to find the > underlying egress device that corresponds to a source IP address, > and rdma_resolve_address() fails. > > Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx> > --- > drivers/net/loopback.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c > index f6d53e63ef4e..1ce4f19d8065 100644 > --- a/drivers/net/loopback.c > +++ b/drivers/net/loopback.c > @@ -192,6 +192,8 @@ static void gen_lo_setup(struct net_device *dev, > dev->needs_free_netdev = true; > dev->priv_destructor = dev_destructor; > > + eth_hw_addr_random(dev); > + > netif_set_tso_max_size(dev, GSO_MAX_SIZE); > } > > > > This enough of a change, it will probably break somebody. If you need dummy endpoint (ie multiple loopback), a common way is to use dummy devices for that.
