From mboxrd@z Thu Jan  1 00:00:00 1970
From: Chris Wilson <chris@chris-wilson.co.uk>
Subject: Re: [PATCH] drm/i915: Fallback to reserve forcewake if
	primary ack missing
Date: Fri, 27 Oct 2017 15:38:36 +0100
Message-ID: <150911511653.2864.5500670008427954903@mail.alporthouse.com>
References: <20171026140144.12267-1-mika.kuoppala@linux.intel.com>
 <20171027140421.15752-1-mika.kuoppala@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 fireflyinternet.com (mail.fireflyinternet.com [109.228.58.192])
 by gabe.freedesktop.org (Postfix) with ESMTPS id 248F46E948
 for <intel-gfx@lists.freedesktop.org>; Fri, 27 Oct 2017 14:39:08 +0000 (UTC)
In-Reply-To: <20171027140421.15752-1-mika.kuoppala@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: Mika Kuoppala <mika.kuoppala@linux.intel.com>, intel-gfx@lists.freedesktop.org
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
List-Id: intel-gfx@lists.freedesktop.org
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