netdev - Re: [PATCH net-next v2] hinic: add set_channels ethtool

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Date:   Fri, 29 May 2020 10:44:24 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Luo bin <luobin9@...wei.com>
Cc:     <davem@...emloft.net>, <linux-kernel@...r.kernel.org>,
        <netdev@...r.kernel.org>, <luoxianjun@...wei.com>,
        <yin.yinshi@...wei.com>, <cloud.wangxiaoyun@...wei.com>
Subject: Re: [PATCH net-next v2] hinic: add set_channels ethtool_ops support

On Thu, 28 May 2020 18:36:33 +0000 Luo bin wrote:
> add support to change TX/RX queue number with ethtool -L
> 
> Signed-off-by: Luo bin <luobin9@...wei.com>

Luo bin, your patches continue to come with Date: header being in the
past. Also suspiciously no time zone offset. Can you address this?

> +static int hinic_set_channels(struct net_device *netdev,
> +			      struct ethtool_channels *channels)
> +{
> +	struct hinic_dev *nic_dev = netdev_priv(netdev);
> +	unsigned int count = channels->combined_count;
> +	int err;
> +
> +	if (!count) {
> +		netif_err(nic_dev, drv, netdev,
> +			  "Unsupported combined_count: 0\n");
> +		return -EINVAL;
> +	}

This check has been added to the core since the last version of you
patch:

	/* ensure there is at least one RX and one TX channel */
	if (!channels.combined_count &&
	    (!channels.rx_count || !channels.tx_count))
		return -EINVAL;

> +	netif_info(nic_dev, drv, netdev, "Set max combined queue number from %d to %d\n",
> +		   hinic_hwdev_num_qps(nic_dev->hwdev), count);
> +
> +	if (netif_running(netdev)) {
> +		netif_info(nic_dev, drv, netdev, "Restarting netdev\n");
> +		hinic_close(netdev);
> +
> +		nic_dev->hwdev->nic_cap.num_qps = count;
> +
> +		err = hinic_open(netdev);
> +		if (err) {
> +			netif_err(nic_dev, drv, netdev,
> +				  "Failed to open netdev\n");
> +			return -EFAULT;
> +		}
> +	} else {
> +		nic_dev->hwdev->nic_cap.num_qps = count;
> +	}
> +
> +	return 0;
>  }