diff options
| -rw-r--r-- | drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c index 1305522f72d6..40efe60eff8d 100644 --- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c +++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c @@ -282,7 +282,6 @@ static int rmnet_changelink(struct net_device *dev, struct nlattr *tb[], { struct rmnet_priv *priv = netdev_priv(dev); struct net_device *real_dev; - struct rmnet_endpoint *ep; struct rmnet_port *port; u16 mux_id; @@ -297,19 +296,27 @@ static int rmnet_changelink(struct net_device *dev, struct nlattr *tb[], if (data[IFLA_RMNET_MUX_ID]) { mux_id = nla_get_u16(data[IFLA_RMNET_MUX_ID]); - if (rmnet_get_endpoint(port, mux_id)) { - NL_SET_ERR_MSG_MOD(extack, "MUX ID already exists"); - return -EINVAL; - } - ep = rmnet_get_endpoint(port, priv->mux_id); - if (!ep) - return -ENODEV; - hlist_del_init_rcu(&ep->hlnode); - hlist_add_head_rcu(&ep->hlnode, &port->muxed_ep[mux_id]); + if (mux_id != priv->mux_id) { + struct rmnet_endpoint *ep; + + ep = rmnet_get_endpoint(port, priv->mux_id); + if (!ep) + return -ENODEV; - ep->mux_id = mux_id; - priv->mux_id = mux_id; + if (rmnet_get_endpoint(port, mux_id)) { + NL_SET_ERR_MSG_MOD(extack, + "MUX ID already exists"); + return -EINVAL; + } + + hlist_del_init_rcu(&ep->hlnode); + hlist_add_head_rcu(&ep->hlnode, + &port->muxed_ep[mux_id]); + + ep->mux_id = mux_id; + priv->mux_id = mux_id; + } } if (data[IFLA_RMNET_FLAGS]) { |