From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tvrtko Ursulin <tursulin@ursulin.net>
Subject: [PATCH 2/4] lib/scatterlist: Avoid potential
	scatterlist entry overflow
Date: Wed, 11 Jan 2017 09:00:36 +0000
Message-ID: <1484125238-2539-2-git-send-email-tvrtko.ursulin@linux.intel.com>
References: <1484125238-2539-1-git-send-email-tvrtko.ursulin@linux.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 mail-wm0-x242.google.com (mail-wm0-x242.google.com
 [IPv6:2a00:1450:400c:c09::242])
 by gabe.freedesktop.org (Postfix) with ESMTPS id 1D4636E825
 for <Intel-gfx@lists.freedesktop.org>; Wed, 11 Jan 2017 09:00:49 +0000 (UTC)
Received: by mail-wm0-x242.google.com with SMTP id c85so35194134wmi.1
 for <Intel-gfx@lists.freedesktop.org>; Wed, 11 Jan 2017 01:00:49 -0800 (PST)
In-Reply-To: <1484125238-2539-1-git-send-email-tvrtko.ursulin@linux.intel.com>
List-Unsubscribe: <https://lists.freedesktop.org/mailman/options/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <https://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: <https://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: Intel-gfx@lists.freedesktop.org
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>, linux-kernel@vger.kernel.org
List-Id: intel-gfx@lists.freedesktop.org
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