netdev - Re: [PATCH] net: dsa: mv88e6xxx: avoid error message on remove from VLAN 0

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Message-ID: <20190531161532.GE20464@t480s.localdomain>
Date:   Fri, 31 May 2019 16:15:32 -0400
From:   Vivien Didelot <vivien.didelot@...il.com>
To:     Nikita Yushchenko <nikita.yoush@...entembedded.com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Marek Behún <marek.behun@....cz>,
        Russell King <rmk+kernel@...linux.org.uk>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Chris Healy <cphealy@...il.com>,
        Nikita Yushchenko <nikita.yoush@...entembedded.com>
Subject: Re: [PATCH] net: dsa: mv88e6xxx: avoid error message on remove from
 VLAN 0

On Fri, 31 May 2019 10:35:14 +0300, Nikita Yushchenko <nikita.yoush@...entembedded.com> wrote:
> When non-bridged, non-vlan'ed mv88e6xxx port is moving down, error
> message is logged:
> 
> failed to kill vid 0081/0 for device eth_cu_1000_4
> 
> This is caused by call from __vlan_vid_del() with vin set to zero, over
> call chain this results into _mv88e6xxx_port_vlan_del() called with
> vid=0, and mv88e6xxx_vtu_get() called from there returns -EINVAL.
> 
> On symmetric path moving port up, call goes through
> mv88e6xxx_port_vlan_prepare() that calls mv88e6xxx_port_check_hw_vlan()
> that returns -EOPNOTSUPP for zero vid.
> 
> This patch changes mv88e6xxx_vtu_get() to also return -EOPNOTSUPP for
> zero vid, then this error code is explicitly cleared in
> dsa_slave_vlan_rx_kill_vid() and error message is no longer logged.
> 
> Signed-off-by: Nikita Yushchenko <nikita.yoush@...entembedded.com>

Reviewed-by: Vivien Didelot <vivien.didelot@...il.com>