netdev - Re: [PATCH net-next 2/3] net: dsa: bcm_sf2: Propagate ethtool::rxnfc to CPU port

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Date:   Mon, 6 Aug 2018 15:37:24 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     netdev@...r.kernel.org, vivien.didelot@...oirfairelinux.com,
        linville@...driver.com, davem@...emloft.net
Subject: Re: [PATCH net-next 2/3] net: dsa: bcm_sf2: Propagate ethtool::rxnfc
 to CPU port



On 08/06/2018 03:32 PM, Andrew Lunn wrote:
>>  int bcm_sf2_get_rxnfc(struct dsa_switch *ds, int port,
>>  		      struct ethtool_rxnfc *nfc, u32 *rule_locs)
>>  {
>> +	struct net_device *p = ds->ports[port].cpu_dp->master;
>>  	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
>>  	int ret = 0;
>>  
>> @@ -1214,12 +1223,20 @@ int bcm_sf2_get_rxnfc(struct dsa_switch *ds, int port,
>>  
>>  	mutex_unlock(&priv->cfp.lock);
> 
> Hi Florian
> 
> I think you should be testing ret here. If you have had a real error,
> you probably should be returning it, rather than overwriting it with
> what ethtool returns below.

Hu, right, thanks for spotting it, this is done in the set_rxnfc() part,
will submit a v2 shortly.

> 
>> +	/* Pass up the commands to the attached master network device */
>> +	if (p->ethtool_ops->get_rxnfc) {
>> +		ret = p->ethtool_ops->get_rxnfc(p, nfc, rule_locs);
>> +		if (ret == -EOPNOTSUPP)
>> +			ret = 0;
>> +	}
>> +
>>  	return ret;
>>  }
> 
>    Andrew
> 

-- 
Florian