linux-kernel - Re: [PATCH V3 net-next 1/8] net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC

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Message-ID: <20170617175418.GB1974@lunn.ch>
Date:   Sat, 17 Jun 2017 19:54:18 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Salil Mehta <salil.mehta@...wei.com>
Cc:     davem@...emloft.net, yisen.zhuang@...wei.com,
        huangdaode@...ilicon.com, lipeng321@...wei.com,
        mehta.salil.lnk@...il.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linuxarm@...wei.com
Subject: Re: [PATCH V3 net-next 1/8] net: hns3: Add support of HNS3 Ethernet
 Driver for hip08 SoC

> +static int hns3_nic_net_up(struct net_device *ndev)
> +{
> +	struct hns3_nic_priv *priv = netdev_priv(ndev);
> +	struct hnae3_handle *h = priv->ae_handle;
> +	int i, j;
> +	int ret;
> +
> +	ret = hns3_nic_init_irq(priv);
> +	if (ret != 0) {

  	if (ret)

No need to compare with zero.

> +		netdev_err(ndev, "hns init irq failed! ret=%d\n", ret);
> +		return ret;

> +static int hns3_nic_net_open(struct net_device *ndev)
> +{
> +	struct hns3_nic_priv *priv = netdev_priv(ndev);
> +	struct hnae3_handle *h = priv->ae_handle;
> +	int ret;
> +
> +	netif_carrier_off(ndev);
> +
> +	ret = netif_set_real_num_tx_queues(ndev, h->kinfo.num_tqps);
> +	if (ret < 0) {
> +		netdev_err(ndev, "netif_set_real_num_tx_queues fail, ret=%d!\n",
> +			   ret);
> +		return ret;
> +	}

In general, functions return 0 for success, and something else for an
error. So there is no need to do a comparison. Please remove all
comparisons, unless it is really needed. It also makes the code look
consistent. At the moment you sometime have < 0, sometime !=0, and
sometimes no comparison at all.

	  Andrew