linux-kernel - Re: [patch net 2/2] net: hns: fixes a bug of RSS

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Date:	Thu, 10 Mar 2016 10:24:13 +0200
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	Kejian Yan <yankejian@...wei.com>, davem@...emloft.net
Cc:	yisen.zhuang@...wei.com, salil.mehta@...wei.com,
	liguozhu@...wei.com, huangdaode@...ilicon.com, arnd@...db.de,
	andrew@...n.ch, chenny.xu@...wei.com, ivecera@...hat.com,
	lisheng011@...wei.com, fengguang.wu@...el.com,
	haifeng.wei@...wei.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linuxarm@...wei.com
Subject: Re: [patch net 2/2] net: hns: fixes a bug of RSS

On Thu, 2016-03-10 at 10:16 +0800, Kejian Yan wrote:
> If trying to get receive flow hash indirection table by ethtool, it
> needs
> to call .get_rxnfc to get ring number first. So this patch implements
> the
> .get_rxnfc of ethtool. And the data type of rss_indir_table is u32,
> it has
> to be multiply by the width of data type when using memcpy.

+static int hns_get_rxnfc(struct net_device *netdev,
> +			 struct ethtool_rxnfc *cmd,
> +			 u32 *rule_locs)
> +{
> +	struct hns_nic_priv *priv = netdev_priv(netdev);
> +	int ret = 0;
> +
> +	switch (cmd->cmd) {
> +	case ETHTOOL_GRXRINGS:
> +		cmd->data = priv->ae_handle->q_num;
> +		break;
> +	default:
> +		ret = -EOPNOTSUPP;
> +		break;
> +	}
> +
> +	return ret;

Redundant ret variable.

switch (value) {
case X:
 break;
default:
 return -ERRNO;
}

return 0;

> +}

-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy