netdev - Re: [PATCH net-next 1/3] net: dsa: mt7530: Convert to PHYLINK API

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Date:   Thu, 01 Aug 2019 13:22:44 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     opensource@...rst.com
Cc:     netdev@...r.kernel.org, frank-w@...lic-files.de,
        sean.wang@...iatek.com, f.fainelli@...il.com,
        matthias.bgg@...il.com, andrew@...n.ch, vivien.didelot@...il.com,
        john@...ozen.org, linux-mediatek@...ts.infradead.org,
        linux-mips@...r.kernel.org, robh+dt@...nel.org,
        devicetree@...r.kernel.org, linux@...linux.org.uk
Subject: Re: [PATCH net-next 1/3] net: dsa: mt7530: Convert to PHYLINK API

From: René van Dorst <opensource@...rst.com>
Date: Thu, 01 Aug 2019 17:21:04 +0000

> Quoting Russell King - ARM Linux admin <linux@...linux.org.uk>:
> 
>> Hi,
>>
>> Just a couple of minor points.
>>
>> On Wed, Jul 24, 2019 at 09:25:47PM +0200, René van Dorst wrote:
> 
> <snip>
> 
>>> +
>>> +static void mt7530_phylink_validate(struct dsa_switch *ds, int port,
>>> +				    unsigned long *supported,
>>> +				    struct phylink_link_state *state)
>>> +{
>>> +	__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
>>> +
>>> +	switch (port) {
>>> +	case 0: /* Internal phy */
>>> +	case 1:
>>> +	case 2:
>>> +	case 3:
>>> +	case 4:
>>> +		if (state->interface != PHY_INTERFACE_MODE_NA &&
>>> +		    state->interface != PHY_INTERFACE_MODE_GMII)
>>> +			goto unsupported;
>>> +		break;
>>> +	/* case 5: Port 5 not supported! */
>>> +	case 6: /* 1st cpu port */
>>> +		if (state->interface != PHY_INTERFACE_MODE_NA &&
>>> +		    state->interface != PHY_INTERFACE_MODE_RGMII &&
>>> +		    state->interface != PHY_INTERFACE_MODE_TRGMII)
>>> +			goto unsupported;
>>> +		break;
>>> +	default:
>>> +		linkmode_zero(supported);
>>> + dev_err(ds->dev, "%s: unsupported port: %i\n", __func__, port);
>>
>> You could reorder this as:
>>
>> 	default:
>> 		dev_err(ds->dev, "%s: unsupported port: %i\n", __func__, port);
>> 	unsupported:
>> 		linkmode_zero(supported);
>>
> 
> Hi David,
> 
>> and save having the "unsupported" at the end of the function.  Not
>> sure
>> what DaveM would think of it though.
> 
> Can you give your option about this?
> So I know what to do with it and make a new series.

Russell's suggestion is fine.