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Date:   Wed, 12 Dec 2018 15:14:51 +0100
From:   Antoine Tenart <antoine.tenart@bootlin.com>
To:     Russell King - ARM Linux <linux@armlinux.org.uk>
Cc:     Baruch Siach <baruch@tkos.co.il>,
        Antoine Tenart <antoine.tenart@bootlin.com>,
        davem@davemloft.net, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com,
        maxime.chevallier@bootlin.com, gregory.clement@bootlin.com,
        miquel.raynal@bootlin.com, nadavh@marvell.com, stefanc@marvell.com,
        ymarkman@marvell.com, mw@semihalf.com
Subject: Re: [PATCH net] net: mvpp2: 10G modes aren't supported on all ports
Message-ID: <20181212141451.GC3219@kwain>
References: <20181211163228.26130-1-antoine.tenart@bootlin.com>
 <20181211163635.GG30658@n2100.armlinux.org.uk>
 <877egg6jbt.fsf@tkos.co.il>
 <20181211185156.GH30658@n2100.armlinux.org.uk>
 <20181212093033.GA3219@kwain>
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Hi,

On Wed, Dec 12, 2018 at 10:30:33AM +0100, Antoine Tenart wrote:
> On Tue, Dec 11, 2018 at 06:51:56PM +0000, Russell King - ARM Linux wrote:
> > On Tue, Dec 11, 2018 at 07:53:42PM +0200, Baruch Siach wrote:
> > > That is, something like this, right?
> > > 
> > > diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> > > index 125ea99418df..04cb0241ca2b 100644
> > > --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> > > +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> > > @@ -4404,13 +4404,18 @@ static void mvpp2_phylink_validate(struct net_device *dev,
> > >  	switch (state->interface) {
> > >  	case PHY_INTERFACE_MODE_10GKR:
> > >  	case PHY_INTERFACE_MODE_XAUI:
> > > +		if (port->gop_id != 0)
> > > +			goto empty_set;
> > > +		/* Fall-through */
> > >  	case PHY_INTERFACE_MODE_NA:
> > > -		phylink_set(mask, 10000baseCR_Full);
> > > -		phylink_set(mask, 10000baseSR_Full);
> > > -		phylink_set(mask, 10000baseLR_Full);
> > > -		phylink_set(mask, 10000baseLRM_Full);
> > > -		phylink_set(mask, 10000baseER_Full);
> > > -		phylink_set(mask, 10000baseKR_Full);
> > > +		if (port->gop_id == 0) {
> > > +			phylink_set(mask, 10000baseCR_Full);
> > > +			phylink_set(mask, 10000baseSR_Full);
> > > +			phylink_set(mask, 10000baseLR_Full);
> > > +			phylink_set(mask, 10000baseLRM_Full);
> > > +			phylink_set(mask, 10000baseER_Full);
> > > +			phylink_set(mask, 10000baseKR_Full);
> > > +		}
> > >  		/* Fall-through */
> > >  	case PHY_INTERFACE_MODE_RGMII:
> > >  	case PHY_INTERFACE_MODE_RGMII_ID:
> > > 
> > 
> > Yep, looks fine to me, thanks.
> 
> This looks good, thanks! I'll send a v2.

Well, I just got back to this, and looking at the beginning of the
validate function invalid modes are already checked. So we do already
have:

        case PHY_INTERFACE_MODE_10GKR:
        case PHY_INTERFACE_MODE_XAUI:
                if (port->gop_id != 0)
                        goto empty_set;
                break;

So it turns out the fix can be applied as-is.

Thanks!
Antoine

-- 
Antoine T?nart, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com