netdev - Re: [PATCH net-next v2] ethtool: Protect {get,set}_phy

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Message-Id: <20161124.160246.1074638964663356987.davem@davemloft.net>
Date:   Thu, 24 Nov 2016 16:02:46 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     f.fainelli@...il.com
Cc:     netdev@...r.kernel.org, bcm-kernel-feedback-list@...adcom.com,
        andrew@...n.ch, allan.nielsen@...rosemi.com,
        raju.lakkaraju@...rosemi.com, vivien.didelot@...oirfairelinux.com
Subject: Re: [PATCH net-next v2] ethtool: Protect {get,set}_phy_tunable
 with PHY device mutex

From: Florian Fainelli <f.fainelli@...il.com>
Date: Tue, 22 Nov 2016 13:55:31 -0800

> PHY drivers should be able to rely on the caller of {get,set}_tunable to
> have acquired the PHY device mutex, in order to both serialize against
> concurrent calls of these functions, but also against PHY state machine
> changes. All ethtool PHY-level functions do this, except
> {get,set}_tunable, so we make them consistent here as well.
> 
> We need to update the Microsemi PHY driver in the same commit to avoid
> introducing either deadlocks, or lack of proper locking.
> 
> Fixes: 968ad9da7e0e ("ethtool: Implements ETHTOOL_PHY_GTUNABLE/ETHTOOL_PHY_STUNABLE")
> Fixes: 310d9ad57ae0 ("net: phy: Add downshift get/set support in Microsemi PHYs driver")
> Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
> ---
> Changes in v2:
> 
> - also patch drivers/net/phy/mscc.c in the same commit

Applied, thanks Florian.