netdev - Re: [PATCH] net: dsa: bcm_sf2: Propagate error value from mdio

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Date:   Wed, 26 Dec 2018 20:13:15 +0100
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Kangjie Lu <kjlu@....edu>
Cc:     pakki001@....edu, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: dsa: bcm_sf2: Propagate error value from mdio_write

On 26.12.2018 19:21, Kangjie Lu wrote:
> Both bcm_sf2_sw_indir_rw and mdiobus_write_nested could fail, so let's
> return their error codes upstream.
> 
> Signed-off-by: Kangjie Lu <kjlu@....edu>
> ---
>  drivers/net/dsa/bcm_sf2.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
> index 2eb68769562c..236815700fba 100644
> --- a/drivers/net/dsa/bcm_sf2.c
> +++ b/drivers/net/dsa/bcm_sf2.c
> @@ -303,11 +303,10 @@ static int bcm_sf2_sw_mdio_write(struct mii_bus *bus, int addr, int regnum,
>  	 * send them to our master MDIO bus controller
>  	 */
>  	if (addr == BRCM_PSEUDO_PHY_ADDR && priv->indir_phy_mask & BIT(addr))
> -		bcm_sf2_sw_indir_rw(priv, 0, addr, regnum, val);
> +		return bcm_sf2_sw_indir_rw(priv, 0, addr, regnum, val);
This is wrong. Please get familiar with what the function does.
And test changes before submitting them!

>  	else
> -		mdiobus_write_nested(priv->master_mii_bus, addr, regnum, val);
> -
> -	return 0;
> +		return mdiobus_write_nested(priv->master_mii_bus,
> +				addr, regnum, val);
>  }
>  
>  static irqreturn_t bcm_sf2_switch_0_isr(int irq, void *dev_id)
>