netdev - Re: [PATCH net-next] net: sparx5: mdb add/del handle non-sparx5 devices

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Message-ID: <195d9aeee538692a3a630bfe7ce5c040396c507b.camel@microchip.com>
Date:   Tue, 28 Jun 2022 14:55:22 +0200
From:   Steen Hegelund <steen.hegelund@...rochip.com>
To:     Casper Andersson <casper.casan@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
CC:     Eric Dumazet <edumazet@...gle.com>,
        Lars Povlsen <lars.povlsen@...rochip.com>,
        <UNGLinuxDriver@...rochip.com>, <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next] net: sparx5: mdb add/del handle non-sparx5
 devices

Hi Casper,

On Tue, 2022-06-28 at 09:55 +0200, Casper Andersson wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> When adding/deleting mdb entries on other net_devices, eg., tap
> interfaces, it should not crash.
> 
> Signed-off-by: Casper Andersson <casper.casan@...il.com>
> ---
>  drivers/net/ethernet/microchip/sparx5/sparx5_switchdev.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_switchdev.c
> b/drivers/net/ethernet/microchip/sparx5/sparx5_switchdev.c
> index 40ef9fad3a77..ec07f7d0528c 100644
> --- a/drivers/net/ethernet/microchip/sparx5/sparx5_switchdev.c
> +++ b/drivers/net/ethernet/microchip/sparx5/sparx5_switchdev.c
> @@ -397,6 +397,9 @@ static int sparx5_handle_port_mdb_add(struct net_device *dev,
>         bool is_host;
>         int res, err;
> 
> +       if (!sparx5_netdevice_check(dev))
> +               return -EOPNOTSUPP;
> +
>         is_host = netif_is_bridge_master(v->obj.orig_dev);
> 
>         /* When VLAN unaware the vlan value is not parsed and we receive vid 0.
> @@ -480,6 +483,9 @@ static int sparx5_handle_port_mdb_del(struct net_device *dev,
>         u32 mact_entry, res, pgid_entry[3], misc_cfg;
>         bool host_ena;
> 
> +       if (!sparx5_netdevice_check(dev))
> +               return -EOPNOTSUPP;
> +
>         if (!br_vlan_enabled(spx5->hw_bridge_dev))
>                 vid = 1;
>         else
> --
> 2.30.2
> 

Indeed!

Reviewed-by: Steen Hegelund <Steen.Hegelund@...rochip.com>

-- 
Best Regards
Steen

-=-=-=-=-=-=-=-=-=-=-=-=-=-=
steen.hegelund@...rochip.com