netdev - Re: [PATCH net-next v6 1/4] net: dsa: mv88e6xxx: Don't forbid MDIO I/Os for PHY addr >= num_of

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Message-ID: <87inp42o8w.fsf@free-electrons.com>
Date:   Tue, 24 Jan 2017 21:31:59 +0100
From:   Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Jason Cooper <jason@...edaemon.net>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        linux-arm-kernel@...ts.infradead.org,
        Nadav Haklai <nadavh@...vell.com>,
        Wilson Ding <dingwei@...vell.com>,
        Kostya Porotchkin <kostap@...vell.com>,
        Joe Zhou <shjzhou@...vell.com>,
        Jon Pannell <jpannell@...vell.com>
Subject: Re: [PATCH net-next v6 1/4] net: dsa: mv88e6xxx: Don't forbid MDIO I/Os for PHY addr >= num_of_ports

Hi,
 
 On mar., janv. 24 2017, Gregory CLEMENT <gregory.clement@...e-electrons.com> wrote:

> From: Romain Perier <romain.perier@...e-electrons.com>
>
> Some Marvell ethernet switches have internal ethernet transceivers with
> hardcoded phy addresses. These addresses can be greater than the number
> 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>
This flag is missing:
Reviewed-by: Vivien Didelot <vivien.didelot@...oirfairelinux.com>

Actually I added during an interactive rebase, but I had to abort it
and it was lost.

Gregory


> Signed-off-by: Gregory CLEMENT <gregory.clement@...e-electrons.com>
> ---
>  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 c7e08e13bb54..7d942f8a42a7 100644
> --- a/drivers/net/dsa/mv88e6xxx/chip.c
> +++ b/drivers/net/dsa/mv88e6xxx/chip.c
> @@ -2882,9 +2882,6 @@ 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);
> @@ -2897,9 +2894,6 @@ 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);
> -- 
> git-series 0.9.1

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