netdev - Re: [PATCH net-next 3/4] net: dsa: setup master ethtool after dsa

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Message-ID: <85ebc3f7-b8b1-a2e4-f0e4-32c309857730@gmail.com>
Date:   Tue, 19 Sep 2017 10:49:52 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
        netdev@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, kernel@...oirfairelinux.com,
        "David S. Miller" <davem@...emloft.net>,
        Andrew Lunn <andrew@...n.ch>
Subject: Re: [PATCH net-next 3/4] net: dsa: setup master ethtool after dsa_ptr

On 09/19/2017 08:56 AM, Vivien Didelot wrote:
> DSA overrides the master's ethtool ops so that we can inject its CPU
> port's statistics. Because of that, we need to setup the ethtool ops
> after the master's dsa_ptr pointer has been assigned, not before.

Yes, good point, technically this is a bugfix, but since we have changed
this quite often and the race is tiny, I am not positive we could a)
trigger this in real life, and b) provide a proper Fixes tag.

> 
> This patch setups the ethtool ops after dsa_ptr is assigned, and
> restores them before it gets cleared.
> 
> Signed-off-by: Vivien Didelot <vivien.didelot@...oirfairelinux.com>

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
-- 
Florian