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/tun.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/net/tun.c b/drivers/net/tun.c index d4d0a41a905a..da85abfcd254 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -1384,7 +1384,7 @@ static void tun_net_initialize(struct net_device *dev) /* Point-to-Point TUN Device */ dev->hard_header_len = 0; - dev->addr_len = 0; + dev->addr_len = ETH_ALEN; dev->mtu = 1500; /* Zero header length */ @@ -1399,8 +1399,6 @@ static void tun_net_initialize(struct net_device *dev) dev->priv_flags &= ~IFF_TX_SKB_SHARING; dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; - eth_hw_addr_random(dev); - /* Currently tun does not support XDP, only tap does. */ dev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT | @@ -1409,6 +1407,8 @@ static void tun_net_initialize(struct net_device *dev) break; } + eth_hw_addr_random(dev); + dev->min_mtu = MIN_MTU; dev->max_mtu = MAX_MTU - dev->hard_header_len; }
