linux-kernel - Re: [PATCH 1/2] net: ethernet: mvneta: Do not error out in non serdes modes

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Message-ID: <20200624095329.GY1551@shell.armlinux.org.uk>
Date:   Wed, 24 Jun 2020 10:53:29 +0100
From:   Russell King - ARM Linux admin <linux@...linux.org.uk>
To:     Sascha Hauer <s.hauer@...gutronix.de>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        kernel@...gutronix.de
Subject: Re: [PATCH 1/2] net: ethernet: mvneta: Do not error out in non
 serdes modes

On Wed, Jun 24, 2020 at 09:00:44AM +0200, Sascha Hauer wrote:
> In mvneta_config_interface() the RGMII modes are catched by the default
> case which is an error return. The RGMII modes are valid modes for the
> driver, so instead of returning an error add a break statement to return
> successfully.
> 
> This avoids this warning for non comphy SoCs which use RGMII, like
> SolidRun Clearfog:
> 
> WARNING: CPU: 0 PID: 268 at drivers/net/ethernet/marvell/mvneta.c:3512 mvneta_start_dev+0x220/0x23c
> 
> Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>

Fixes: b4748553f53f ("net: ethernet: mvneta: Fix Serdes configuration for SoCs without comphy")
Reviewed-by: Russell King <rmk+kernel@...linux.org.uk>

Thanks.

> ---
>  drivers/net/ethernet/marvell/mvneta.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
> index af60001728481..c4552f868157c 100644
> --- a/drivers/net/ethernet/marvell/mvneta.c
> +++ b/drivers/net/ethernet/marvell/mvneta.c
> @@ -3571,7 +3571,7 @@ static int mvneta_config_interface(struct mvneta_port *pp,
>  				    MVNETA_HSGMII_SERDES_PROTO);
>  			break;
>  		default:
> -			return -EINVAL;
> +			break;
>  		}
>  	}
>  
> -- 
> 2.27.0
> 
> 

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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