From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net-next v2 1/3] net: phy: xgmiitorgmii: Check
 phy_driver ready before accessing
Date: Thu, 28 Jun 2018 16:12:35 +0900 (KST)
Message-ID: <20180628.161235.277685925315349662.davem@davemloft.net>
References: <20180626175050.71165-1-brandon.maier@rockwellcollins.com>
Mime-Version: 1.0
Content-Type: Text/Plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Cc: netdev@vger.kernel.org, andrew@lunn.ch, f.fainelli@gmail.com,
        michal.simek@xilinx.com, clayton.shotwell@rockwellcollins.com,
        kristopher.cory@rockwellcollins.com, linux-kernel@vger.kernel.org
To: brandon.maier@rockwellcollins.com
Return-path: <linux-kernel-owner@vger.kernel.org>
In-Reply-To: <20180626175050.71165-1-brandon.maier@rockwellcollins.com>
Sender: linux-kernel-owner@vger.kernel.org
List-Id: netdev.vger.kernel.org

From: Brandon Maier <brandon.maier@rockwellcollins.com>
Date: Tue, 26 Jun 2018 12:50:48 -0500

> Since a phy_device is added to the global mdio_bus list during
> phy_device_register(), but a phy_device's phy_driver doesn't get
> attached until phy_probe(). It's possible of_phy_find_device() in
> xgmiitorgmii will return a valid phy with a NULL phy_driver. Leading to
> a NULL pointer access during the memcpy().
> 
> Fixes this Oops:
 ...
> Signed-off-by: Brandon Maier <brandon.maier@rockwellcollins.com>

Applied.