netdev - Re: [PATCH v3 net-next 1/3] net: dsa: mv88e6xxx: Don't forbid MDIO I/Os for PHY addr >= num_of

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Message-ID: <87poklirbs.fsf@free-electrons.com>
Date:   Wed, 21 Dec 2016 10:06:47 +0100
From:   Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:     Romain Perier <romain.perier@...e-electrons.com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Jason Cooper <jason@...edaemon.net>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Ian Campbell <ijc+devicetree@...lion.org.uk>,
        Pawel Moll <pawel.moll@....com>,
        Mark Rutland <mark.rutland@....com>,
        Kumar Gala <galak@...eaurora.org>,
        linux-arm-kernel@...ts.infradead.org,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        Nadav Haklai <nadavh@...vell.com>
Subject: Re: [PATCH v3 net-next 1/3] net: dsa: mv88e6xxx: Don't forbid MDIO I/Os for PHY addr >= num_of_ports

Hi Romain,


it seems there is a remaining typo :)

 On mer., déc. 21 2016, Romain Perier <romain.perier@...e-electrons.com> wrote:

> Some Marvell ethernet switches have internal ethernet transceivers with
> hardcoded phy addresses. These addresses can be grearer than the number
                                                  greater
> of ports or its value might be different than the associated port number.
> This is for example the case for MV88E6341 that has 6 ports and internal
> Port 1 to Port4 PHYs mapped at SMI addresses from 0x11 to 0x14.
>
> This commits fixes the issue by removing the condition in MDIO callbacks.
>
> Signed-off-by: Romain Perier <romain.perier@...e-electrons.com>
> Reviewed-by: Andrew Lunn <andrew@...n.ch>
> ---
>
> Changes in v2:
>  - Added tag "Reviewed-by" by Andrew
>  - Fixed typo in the commit log
>
>  drivers/net/dsa/mv88e6xxx/chip.c | 6 ------
>  1 file changed, 6 deletions(-)
>
> diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
> index b5f0e1e..76d944e 100644
> --- a/drivers/net/dsa/mv88e6xxx/chip.c
> +++ b/drivers/net/dsa/mv88e6xxx/chip.c
> @@ -2881,9 +2881,6 @@ static int mv88e6xxx_mdio_read(struct mii_bus *bus, int phy, int reg)
>  	u16 val;
>  	int err;
>  
> -	if (phy >= mv88e6xxx_num_ports(chip))
> -		return 0xffff;
> -
>  	mutex_lock(&chip->reg_lock);
>  	err = mv88e6xxx_phy_read(chip, phy, reg, &val);
>  	mutex_unlock(&chip->reg_lock);
> @@ -2896,9 +2893,6 @@ static int mv88e6xxx_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val)
>  	struct mv88e6xxx_chip *chip = bus->priv;
>  	int err;
>  
> -	if (phy >= mv88e6xxx_num_ports(chip))
> -		return 0xffff;
> -
>  	mutex_lock(&chip->reg_lock);
>  	err = mv88e6xxx_phy_write(chip, phy, reg, val);
>  	mutex_unlock(&chip->reg_lock);
> -- 
> 2.9.3
>

-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com