From mboxrd@z Thu Jan  1 00:00:00 1970
From: Lukas Wunner <lukas@wunner.de>
Subject: Re: [PATCH] drm/i915: Protect fbdev across slow or
 failed initialisation
Date: Wed, 3 Feb 2016 14:25:15 +0100
Message-ID: <20160203132515.GA13474@wunner.de>
References: <9BD218709B5F2A4F96F08B4A3B98A897372F0C4C@SHSMSX104.ccr.corp.intel.com>
 <1454491057-16258-1-git-send-email-chris@chris-wilson.co.uk>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <intel-gfx-bounces@lists.freedesktop.org>
Received: from mailout3.hostsharing.net (mailout3.hostsharing.net
 [176.9.242.54])
 by gabe.freedesktop.org (Postfix) with ESMTPS id 64BD16E6F4
 for <intel-gfx@lists.freedesktop.org>; Wed,  3 Feb 2016 05:25:09 -0800 (PST)
Content-Disposition: inline
In-Reply-To: <1454491057-16258-1-git-send-email-chris@chris-wilson.co.uk>
List-Unsubscribe: <http://lists.freedesktop.org/mailman/options/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <http://lists.freedesktop.org/archives/intel-gfx>
List-Post: <mailto:intel-gfx@lists.freedesktop.org>
List-Help: <mailto:intel-gfx-request@lists.freedesktop.org?subject=help>
List-Subscribe: <http://lists.freedesktop.org/mailman/listinfo/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=subscribe>
Errors-To: intel-gfx-bounces@lists.freedesktop.org
Sender: "Intel-gfx" <intel-gfx-bounces@lists.freedesktop.org>
To: Chris Wilson <chris@chris-wilson.co.uk>
Cc: intel-gfx@lists.freedesktop.org, gustav.fagerlind@gmail.com, "Li,
 Weinan Z" <weinan.z.li@intel.com>
List-Id: intel-gfx@lists.freedesktop.org
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=