From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mikko Perttunen <mperttunen@nvidia.com>
Subject: Re: [PATCH 4/5] drm/tegra: Restrict IOVA space to DMA mask
Date: Thu, 24 Jan 2019 15:27:12 +0200
Message-ID: <c61821fe-7504-f499-2b60-e182614cc4cb@nvidia.com>
References: <20190123093951.24908-1-thierry.reding@gmail.com>
 <20190123093951.24908-5-thierry.reding@gmail.com>
 <314d2386-3d1b-dda0-3d5e-b277d8c09045@gmail.com>
 <20190123140406.GA16034@ulmo>
 <f395269e-22be-ef2c-1189-b7b28f42f7d8@gmail.com>
 <c6eed145-35c3-76fe-fe7d-8069686207d7@gmail.com>
 <0dcdb45e-5832-80fb-c842-4a32bc3469e3@kapsi.fi>
 <9e8f02fe-409a-c485-ac5b-a62574ab216e@gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Content-Transfer-Encoding: base64
Return-path: <dri-devel-bounces@lists.freedesktop.org>
In-Reply-To: <9e8f02fe-409a-c485-ac5b-a62574ab216e@gmail.com>
Content-Language: en-US
List-Unsubscribe: <https://lists.freedesktop.org/mailman/options/dri-devel>,
 <mailto:dri-devel-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <https://lists.freedesktop.org/archives/dri-devel>
List-Post: <mailto:dri-devel@lists.freedesktop.org>
List-Help: <mailto:dri-devel-request@lists.freedesktop.org?subject=help>
List-Subscribe: <https://lists.freedesktop.org/mailman/listinfo/dri-devel>,
 <mailto:dri-devel-request@lists.freedesktop.org?subject=subscribe>
Errors-To: dri-devel-bounces@lists.freedesktop.org
Sender: "dri-devel" <dri-devel-bounces@lists.freedesktop.org>
To: Dmitry Osipenko <digetx@gmail.com>, Mikko Perttunen <cyndis@kapsi.fi>, Thierry Reding <thierry.reding@gmail.com>
Cc: linux-tegra@vger.kernel.org, dri-devel@lists.freedesktop.org
List-Id: linux-tegra@vger.kernel.org
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