linux-kernel - Re: [PATCH net-next 07/13] net: mvpp2: improve the link management function

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Date:   Thu, 24 Aug 2017 16:14:13 +0200
From:   Antoine Tenart <antoine.tenart@...e-electrons.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Antoine Tenart <antoine.tenart@...e-electrons.com>,
        davem@...emloft.net, kishon@...com, jason@...edaemon.net,
        sebastian.hesselbarth@...il.com,
        gregory.clement@...e-electrons.com,
        thomas.petazzoni@...e-electrons.com, nadavh@...vell.com,
        linux@...linux.org.uk, linux-kernel@...r.kernel.org,
        mw@...ihalf.com, stefanc@...vell.com,
        miquel.raynal@...e-electrons.com, netdev@...r.kernel.org
Subject: Re: [PATCH net-next 07/13] net: mvpp2: improve the link management
 function

Hi Andrew,

On Thu, Aug 24, 2017 at 04:06:25PM +0200, Andrew Lunn wrote:
> On Thu, Aug 24, 2017 at 10:38:17AM +0200, Antoine Tenart wrote:
> > @@ -5753,14 +5753,24 @@ static void mvpp2_link_event(struct net_device *dev)
> >  		port->link = phydev->link;
> >  
> >  		if (phydev->link) {
> > +			mvpp2_interrupts_enable(port);
> > +			mvpp2_port_enable(port);
> > +
> >  			mvpp2_egress_enable(port);
> >  			mvpp2_ingress_enable(port);
> > +			netif_carrier_on(dev);
> 
> Have you seen cases where it is required to change the carrier state?
> The phy state machine should be doing this. e.g. when autoneg has
> completed, force link configuration, the link goes down etc.

I don't think I saw a case where this was needed. And if phylib already
handle this I think it should be removed from here as the
mvpp2_link_event only is called by phylib.

Thanks!
Antoine

-- 
Antoine Ténart, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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