net/mlx5e: Sync netdev vxlan ports at open

[ Upstream commit a117f73d ]

When mlx5_core is loaded it is expected to sync ports
with all vxlan devices so it can support vxlan encap/decap.
This is done via udp_tunnel_get_rx_info(). Currently this
call is set in mlx5e_nic_enable() and if the netdev is not in
NETREG_REGISTERED state it will not be called.

Normally on load the netdev state is not NETREG_REGISTERED
so udp_tunnel_get_rx_info() will not be called.

Moving udp_tunnel_get_rx_info() to mlx5e_open() so
it will be called on netdev UP event and allow encap/decap.

Fixes: 610e89e0 ("net/mlx5e: Don't sync netdev state when not registered")
Signed-off-by: Shahar Klein <shahark@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/net/ethernet/mellanox/mlx5/core/en_main.c

@@ -2741,6 +2741,9 @@ static int set_feature_lro(struct net_device *netdev, bool enable)
 
 	mutex_unlock(&priv->state_lock);
 
+	if (mlx5e_vxlan_allowed(priv->mdev))
+		udp_tunnel_get_rx_info(netdev);
+
 	return err;
 }
 
@@ -3785,13 +3788,6 @@ static void mlx5e_nic_enable(struct mlx5e_priv *priv)
 	if (netdev->reg_state != NETREG_REGISTERED)
 		return;
 
-	/* Device already registered: sync netdev system state */
-	if (mlx5e_vxlan_allowed(mdev)) {
-		rtnl_lock();
-		udp_tunnel_get_rx_info(netdev);
-		rtnl_unlock();
-	}
-
 	queue_work(priv->wq, &priv->set_rx_mode_work);
 }