From mboxrd@z Thu Jan  1 00:00:00 1970
From: Imre Deak <imre.deak@intel.com>
Subject: Re: [PATCH] drm/i915: avoid leaking DMA mappings
Date: Mon, 06 Jul 2015 19:23:42 +0300
Message-ID: <1436199822.10850.37.camel@intel.com>
References: <1436194237-850-1-git-send-email-imre.deak@intel.com>
 <20150706145744.GJ5312@nuc-i3427.alporthouse.com>
 <20150706152939.GV2156@phenom.ffwll.local>
 <20150706153315.GM5312@nuc-i3427.alporthouse.com>
 <1436198160.10850.29.camel@intel.com>
 <20150706160420.GQ5312@nuc-i3427.alporthouse.com>
Reply-To: imre.deak@intel.com
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 mga02.intel.com (mga02.intel.com [134.134.136.20])
 by gabe.freedesktop.org (Postfix) with ESMTP id 000636E144
 for <intel-gfx@lists.freedesktop.org>; Mon,  6 Jul 2015 09:23:44 -0700 (PDT)
In-Reply-To: <20150706160420.GQ5312@nuc-i3427.alporthouse.com>
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
List-Id: intel-gfx@lists.freedesktop.org
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