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

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Message-ID: <e316f3e4-fdc7-ebba-e6d8-ae74ba257b08@huawei.com>
Date:   Sat, 30 May 2020 09:30:35 +0800
From:   "luobin (L)" <luobin9@...wei.com>
To:     Jakub Kicinski <kuba@...nel.org>
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 2020/5/30 1:44, Jakub Kicinski wrote:

> 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;
>>   }
> Will fix. Thanks.
> .