netdev - Re: [PATCH net-next v3.16]r8169: Implement definitions from linux/mii.h header

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Date:	Fri, 25 Mar 2016 16:00:21 +0200
From:	Corcodel Marian <asd@...ian1000.go.ro>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Cc:	netdev@...r.kernel.org, Francois Romieu <romieu@...zoreil.com>
Subject: Re: [PATCH net-next v3.16]r8169: Implement definitions from
 linux/mii.h header

On Fri, 25 Mar 2016 14:46:03 +0300
Sergei Shtylyov <sergei.shtylyov@...entembedded.com> wrote:

> Hello.
> 
> On 3/25/2016 1:25 PM, Corcodel Marian wrote:
> 
> >   Add definitions from mii and inhibit 0 to advertise.
> >
> > Signed-off-by: Corcodel Marian <asd@...ian1000.go.ro>
> > ---
> >   drivers/net/ethernet/realtek/r8169.c | 22 ++++++----------------
> >   1 file changed, 6 insertions(+), 16 deletions(-)
> >
> > diff --git a/drivers/net/ethernet/realtek/r8169.c
> > b/drivers/net/ethernet/realtek/r8169.c index a57b650..a450656 100644
> > --- a/drivers/net/ethernet/realtek/r8169.c
> > +++ b/drivers/net/ethernet/realtek/r8169.c
> > @@ -1679,29 +1679,19 @@ static int rtl8169_set_speed_xmii(struct
> > net_device *dev, int auto_nego;
> >
> >   		auto_nego = rtl_readphy(tp, MII_ADVERTISE);
> > -		auto_nego &= ~(ADVERTISE_10HALF | ADVERTISE_10FULL
> > |
> > -				ADVERTISE_100HALF |
> > ADVERTISE_100FULL); -
> > -		if (adv & ADVERTISED_10baseT_Half)
> > -			auto_nego |= ADVERTISE_10HALF;
> > -		if (adv & ADVERTISED_10baseT_Full)
> > -			auto_nego |= ADVERTISE_10FULL;
> > -		if (adv & ADVERTISED_100baseT_Half)
> > -			auto_nego |= ADVERTISE_100HALF;
> > -		if (adv & ADVERTISED_100baseT_Full)
> > -			auto_nego |= ADVERTISE_100FULL;
> > +		auto_nego &= ~(0 | ADVERTISE_10HALF |
> > ADVERTISE_10FULL |
> 
>     ORing with 0 doesn't change the result.
> 
> > +				ADVERTISE_100HALF |
> > ADVERTISE_100FULL |
> > +				ADVERTISE_PAUSE_CAP |
> > ADVERTISE_PAUSE_ASYM);
> >
> > +		auto_nego |= ethtool_adv_to_mii_adv_t(adv);
> >   		auto_nego |= ADVERTISE_PAUSE_CAP |
> > ADVERTISE_PAUSE_ASYM;
> >
> >   		giga_ctrl = rtl_readphy(tp, MII_CTRL1000);
> > -		giga_ctrl &= ~(ADVERTISE_1000FULL |
> > ADVERTISE_1000HALF);
> > +		giga_ctrl &= ~(0 | ADVERTISE_1000FULL |
> > ADVERTISE_1000HALF);
> 
>     Likewise.
> 
> [...]
> 
> MBR, Sergei
> 

>Zero not change result but is defined mii_adv_to_ethtool_adv_t,
>ethtool_adv_to_mii_ctrl1000_t and not want to set because on
>first bit from register is set on default and only 
>CSMA/CD protocol is supported.For more info see mii.h file from
>kernel