From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Subject: Re: [PATCH 03/15] drm/i915: Only spin whilst waiting on
 the current request
Date: Mon, 30 Nov 2015 10:06:10 +0000
Message-ID: <565C1F92.2010501@linux.intel.com>
References: <1448786893-2522-1-git-send-email-chris@chris-wilson.co.uk>
 <1448786893-2522-4-git-send-email-chris@chris-wilson.co.uk>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Content-Transfer-Encoding: base64
Return-path: <intel-gfx-bounces@lists.freedesktop.org>
Received: from mga03.intel.com (mga03.intel.com [134.134.136.65])
 by gabe.freedesktop.org (Postfix) with ESMTP id 530696E4DD
 for <intel-gfx@lists.freedesktop.org>; Mon, 30 Nov 2015 02:06:13 -0800 (PST)
In-Reply-To: <1448786893-2522-4-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>, Eero Tamminen <eero.t.tamminen@intel.com>, stable@kernel.vger.org, "Rantala,
 Valtteri" <valtteri.rantala@intel.com>
List-Id: intel-gfx@lists.freedesktop.org
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