On Tue, 1 Oct 2019 11:24:43 +0200
Lorenzo Bianconi <lore...@kernel.org> wrote:
> +static int mvneta_xdp_setup(struct net_device *dev, struct bpf_prog
> *prog,
> + struct netlink_ext_ack *extack)
> +{
> + struct mvneta_port *pp = netdev_priv(dev);
> + struct bpf_prog *old_prog;
> +
> + if (prog && dev->mtu > MVNETA_MAX_RX_BUF_SIZE) {
> + NL_SET_ERR_MSG_MOD(extack, "Jumbo frames not
> supported on XDP");
> + return -EOPNOTSUPP;
-ENOTSUPP maybe?
> + }
> +
> + mvneta_stop(dev);
only stop and restart if already running
> +
> + old_prog = xchg(&pp->xdp_prog, prog);
> + if (old_prog)
> + bpf_prog_put(old_prog);
> +
> + mvneta_open(dev);
^^
--
Matteo Croce
per aspera ad upstream
