From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Subject: Re: [PATCH] drm/i915: fix HW lockup due to missing RPS
	IRQ workaround on GEN6
Date: Fri, 19 Dec 2014 14:30:27 +0200
Message-ID: <87bnmzom8s.fsf@gaia.fi.intel.com>
References: <1418982801-27500-1-git-send-email-imre.deak@intel.com>
 <20141219102122.GI2711@phenom.ffwll.local>
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 mga03.intel.com (mga03.intel.com [134.134.136.65])
 by gabe.freedesktop.org (Postfix) with ESMTP id E9A276E5CE
 for <intel-gfx@lists.freedesktop.org>; Fri, 19 Dec 2014 04:31:12 -0800 (PST)
In-Reply-To: <20141219102122.GI2711@phenom.ffwll.local>
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: Daniel Vetter <daniel@ffwll.ch>, Imre Deak <imre.deak@intel.com>
Cc: intel-gfx@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org
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