Subject: Re: [PATCH v2 net-next 3/5] drivers/net/phy: add connection between ethtool and phylib for PLCA

From: Andrew Lunn <[email-masked]>
Date: Sat, 7 Jan 2023 18:37:52 +0100

> +	// if not enabling PLCA, skip a few sanity checks
> +	if (plca_cfg->enabled <= 0)
> +		goto apply_cfg;
> +
> +	if (!linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT1S_P2MP_Half_BIT,
> +			       phydev->advertising)) {
> +		ret = -EOPNOTSUPP;
> +		NL_SET_ERR_MSG(extack,
> +			       "Point to Multi-Point mode is not enabled");
> +	}
> +
> +	// allow setting node_id concurrently with enabled
> +	if (plca_cfg->node_id >= 0)
> +		curr_plca_cfg->node_id = plca_cfg->node_id;
> +
> +	if (curr_plca_cfg->node_id >= 255) {
> +		NL_SET_ERR_MSG(extack, "PLCA node ID is not set");
> +		ret = -EINVAL;
> +		goto out_drv;
> +	}
> +
> +apply_cfg:
> +	ret = phydev->drv->set_plca_cfg(phydev, plca_cfg);

Goto which don't jump to the end of the function is generally frowned
upon. I suggest you put these sanity checks into a little helper, so
you can avoid the goto.

With that change make, feel free to add my reviewed-by.

     Andrew