From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jani Nikula <jani.nikula@linux.intel.com>
Subject: Re: [PATCH] drm/i915: Limit the number of loops for
	reading	a split 64bit register
Date: Tue, 08 Sep 2015 15:36:32 +0300
Message-ID: <8737ypnl4f.fsf@intel.com>
References: <1441697059-26221-1-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 mga11.intel.com (mga11.intel.com [192.55.52.93])
 by gabe.freedesktop.org (Postfix) with ESMTP id 026836E86A
 for <intel-gfx@lists.freedesktop.org>; Tue,  8 Sep 2015 05:33:22 -0700 (PDT)
In-Reply-To: <1441697059-26221-1-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>, intel-gfx@lists.freedesktop.org
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>, stable@vger.kernel.org
List-Id: intel-gfx@lists.freedesktop.org
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=