netdev - Re: [patch net-next RFC 04/12] dsa: set devlink port attrs for dsa ports

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Message-ID: <20180323133002.GF5145@lunn.ch>
Date:   Fri, 23 Mar 2018 14:30:02 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, idosch@...lanox.com,
        jakub.kicinski@...ronome.com, mlxsw@...lanox.com,
        vivien.didelot@...oirfairelinux.com, f.fainelli@...il.com,
        michael.chan@...adcom.com, ganeshgr@...lsio.com,
        saeedm@...lanox.com, simon.horman@...ronome.com,
        pieter.jansenvanvuuren@...ronome.com, john.hurley@...ronome.com,
        dirk.vandermerwe@...ronome.com, alexander.h.duyck@...el.com,
        ogerlitz@...lanox.com, dsahern@...il.com, vijaya.guvva@...ium.com,
        satananda.burla@...ium.com, raghu.vatsavayi@...ium.com,
        felix.manlunas@...ium.com, gospo@...adcom.com,
        sathya.perla@...adcom.com, vasundhara-v.volam@...adcom.com,
        tariqt@...lanox.com, eranbe@...lanox.com,
        jeffrey.t.kirsher@...el.com
Subject: Re: [patch net-next RFC 04/12] dsa: set devlink port attrs for dsa
 ports

On Thu, Mar 22, 2018 at 11:55:14AM +0100, Jiri Pirko wrote:
> From: Jiri Pirko <jiri@...lanox.com>
> 
> Set the attrs and allow to expose port flavour to user via devlink.
> 
> Signed-off-by: Jiri Pirko <jiri@...lanox.com>
> ---
>  net/dsa/dsa2.c | 23 +++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
> 
> diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
> index adf50fbc4c13..49453690696d 100644
> --- a/net/dsa/dsa2.c
> +++ b/net/dsa/dsa2.c
> @@ -270,7 +270,27 @@ static int dsa_port_setup(struct dsa_port *dp)
>  	case DSA_PORT_TYPE_UNUSED:
>  		break;
>  	case DSA_PORT_TYPE_CPU:
> +		/* dp->index is used now as port_number. However
> +		 * CPU ports should have separate numbering
> +		 * independent from front panel port numbers.
> +		 */
> +		devlink_port_attrs_set(&dp->devlink_port,
> +				       DEVLINK_PORT_FLAVOUR_CPU,
> +				       dp->index, false, 0);
> +		err = dsa_port_link_register_of(dp);
> +		if (err) {
> +			dev_err(ds->dev, "failed to setup link for port %d.%d\n",
> +				ds->index, dp->index);
> +			return err;
> +		}

Ah, i get it. These used to be two case statements with one code
block. But you split them apart, so needed to duplicate the
dsa_port_link_register.

Unfortunately, you forgot to add a 'break;', so it still falls
through, and overwrites the port flavour to DSA.

>  	case DSA_PORT_TYPE_DSA:
> +		/* dp->index is used now as port_number. However
> +		 * DSA ports should have separate numbering
> +		 * independent from front panel port numbers.
> +		 */
> +		devlink_port_attrs_set(&dp->devlink_port,
> +				       DEVLINK_PORT_FLAVOUR_DSA,
> +				       dp->index, false, 0);

  Andrew