netdev - Re: [PATCH net 01/20] net/hinic: Initialize hw interface

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Date:   Wed, 12 Jul 2017 17:29:33 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Aviad Krawczyk <aviad.krawczyk@...wei.com>
Cc:     davem@...emloft.net, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, bc.y@...wei.com, victor.gissin@...wei.com,
        zhaochen6@...wei.com, tony.qu@...wei.com
Subject: Re: [PATCH net 01/20] net/hinic: Initialize hw interface

> +
> +#define HINIC_DRV_NAME		"HiNIC"
> +#define HINIC_DRV_VERSION	"1.0"

Hi Aviad

Please don't add a driver version. There was a discussion about this
recently, how pointless it is.

> +/**
> + * hinic_init_hwdev - Initialize the NIC HW
> + * @hwdev: the NIC HW device that is returned from the initialization
> + * @pdev: the NIC pci device
> + *
> + * Return 0 - Success, negative - Failure
> + *
> + * Initialize the NIC HW device and return a pointer to it in the first arg
> + **/
> +int hinic_init_hwdev(struct hinic_hwdev **hwdev, struct pci_dev *pdev)
> +{
> +	struct hinic_pfhwdev *pfhwdev;
> +	struct hinic_hwif *hwif;
> +	int err;
> +
> +	hwif = kzalloc(sizeof(*hwif), GFP_KERNEL);

Using the devm_ functions makes your cleanup code simpler when
handling memory.

> +/**
> + * nic_dev_init - Initialize the NIC device
> + * @pdev: the NIC pci device
> + *
> + * Return 0 - Success, negative - Failure
> + **/
> +static int nic_dev_init(struct pci_dev *pdev)
> +{
> +	struct hinic_dev *nic_dev;
> +	struct net_device *netdev;
> +	struct hinic_hwdev *hwdev;
> +	int err, num_qps;
> +
> +	err = hinic_init_hwdev(&hwdev, pdev);
> +	if (err) {
> +		dev_err(&pdev->dev, "Failed to initialize HW device\n");
> +		return err;
> +	}
> +
> +	num_qps = hinic_hwdev_num_qps(hwdev);
> +	if (num_qps <= 0) {
> +		dev_err(&pdev->dev, "Invalid number of QPS\n");
> +		err = -EINVAL;
> +		goto num_qps_err;
> +	}
> +
> +	netdev = alloc_etherdev_mq(sizeof(*nic_dev), num_qps);
> +	if (!netdev) {
> +		pr_err("Failed to allocate Ethernet device\n");

Above you used dev_err, here you used pr_err(). Please be consistent.

> +		err = -ENOMEM;
> +		goto alloc_etherdev_err;
> +	}
> +
> +	netdev->netdev_ops = &hinic_netdev_ops;
> +
> +	nic_dev = (struct hinic_dev *)netdev_priv(netdev);
> +	nic_dev->hwdev = hwdev;
> +	nic_dev->netdev = netdev;
> +	nic_dev->msg_enable = MSG_ENABLE_DEFAULT;
> +
> +	pci_set_drvdata(pdev, netdev);
> +
> +	netif_carrier_off(netdev);
> +
> +	err = register_netdev(netdev);
> +	if (err) {
> +		netif_err(nic_dev, probe, netdev, "Failed to register netdev\n");

probably not a good idea to use netif_err, if register_netdev just
failed. dev_err() would be better.