diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c index e23eaf3f6d037d42549316877e9ba2487a92163a..6c6230b44bcd2bd8a7d3ba0dcbffcd3d9a5d41fd 100644 --- a/drivers/net/team/team.c +++ b/drivers/net/team/team.c @@ -1160,6 +1160,13 @@ static int team_port_add(struct team *team, struct net_device *port_dev, return -EINVAL; } + if (netdev_has_upper_dev(dev, port_dev)) { + NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface"); + netdev_err(dev, "Device %s is already an upper device of the team interface\n", + portname); + return -EBUSY; + } + if (port_dev->features & NETIF_F_VLAN_CHALLENGED && vlan_uses_dev(dev)) { NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");