From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dmitry Osipenko <digetx@gmail.com>
Subject: Re: [PATCH 4/5] drm/tegra: Restrict IOVA space to DMA mask
Date: Thu, 24 Jan 2019 16:51:27 +0300
Message-ID: <b150f205-3a6c-923d-ff25-c62c64337472@gmail.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>
 <c61821fe-7504-f499-2b60-e182614cc4cb@nvidia.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <dri-devel-bounces@lists.freedesktop.org>
In-Reply-To: <c61821fe-7504-f499-2b60-e182614cc4cb@nvidia.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: Mikko Perttunen <mperttunen@nvidia.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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