netdev - Re: [PATCH net 06/10] net: hns: fix return value of the function about rss

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Message-ID: <56F09CED.3060607@huawei.com>
Date:	Tue, 22 Mar 2016 09:16:29 +0800
From:	Yisen Zhuang <Yisen.zhuang@...wei.com>
To:	David Miller <davem@...emloft.net>
CC:	<yankejian@...wei.com>, <huangdaode@...ilicon.com>,
	<salil.mehta@...wei.com>, <lisheng011@...wei.com>,
	<lipeng321@...wei.com>, <liguozhu@...wei.com>, <arnd@...db.de>,
	<xieqianqian@...wei.com>, <andrew@...n.ch>, <ivecera@...hat.com>,
	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linuxarm@...wei.com>
Subject: Re: [PATCH net 06/10] net: hns: fix return value of the function
 about rss



在 2016/3/21 23:42, David Miller 写道:
> From: Yisen Zhuang <Yisen.Zhuang@...wei.com>
> Date: Mon, 21 Mar 2016 19:06:37 +0800
> 
>> diff --git a/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c b/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
>> index 3c4a3bc..f3a5e05 100644
>> --- a/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
>> +++ b/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
>  ...
>> @@ -1235,12 +1226,11 @@ hns_set_rss(struct net_device *netdev, const u32 *indir, const u8 *key,
>>  {
>>  	struct hns_nic_priv *priv = netdev_priv(netdev);
>>  	struct hnae_ae_ops *ops;
>> -	int ret;
>>  
>>  	if (AE_IS_VER1(priv->enet_ver)) {
>>  		netdev_err(netdev,
>>  			   "RSS feature is not supported on this hardware\n");
>> -		return -EOPNOTSUPP;
>> +		return (u32)-EOPNOTSUPP;
>>  	}
>>  
> 
> This is incredibly broken, you cannot cast this negative error return value to
> an unsigned integer.
> 
Hi David,

This is my misunderstanding of the return value. Will fix it in next version.

Many thanks,

Yisen

> .
>