From mboxrd@z Thu Jan  1 00:00:00 1970
From: Daniel Vetter <daniel@ffwll.ch>
Subject: Re: [PATCH v2 2/2] drm/i915: fix HW lockup due to
 missing RPS IRQ workaround on GEN6
Date: Fri, 19 Dec 2014 14:41:11 +0100
Message-ID: <20141219134111.GM2711@phenom.ffwll.local>
References: <1418993517-9324-1-git-send-email-imre.deak@intel.com>
 <1418993517-9324-2-git-send-email-imre.deak@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-wi0-f179.google.com (mail-wi0-f179.google.com
 [209.85.212.179])
 by gabe.freedesktop.org (Postfix) with ESMTP id 46DF26E508
 for <intel-gfx@lists.freedesktop.org>; Fri, 19 Dec 2014 05:41:15 -0800 (PST)
Received: by mail-wi0-f179.google.com with SMTP id ex7so1826739wid.0
 for <intel-gfx@lists.freedesktop.org>; Fri, 19 Dec 2014 05:41:14 -0800 (PST)
Content-Disposition: inline
In-Reply-To: <1418993517-9324-2-git-send-email-imre.deak@intel.com>
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: Imre Deak <imre.deak@intel.com>
Cc: intel-gfx@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org
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