From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= <ville.syrjala@linux.intel.com>
Subject: Re: [PATCH 1/9] drm/i915: Drop posting reads to flush
 master interrupts
Date: Thu, 28 Jun 2018 16:06:40 +0300
Message-ID: <20180628130640.GJ20518@intel.com>
References: <20180628123351.31240-1-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 mga07.intel.com (mga07.intel.com [134.134.136.100])
 by gabe.freedesktop.org (Postfix) with ESMTPS id 3B2D56ED45
 for <intel-gfx@lists.freedesktop.org>; Thu, 28 Jun 2018 13:06:44 +0000 (UTC)
Content-Disposition: inline
In-Reply-To: <20180628123351.31240-1-chris@chris-wilson.co.uk>
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: Chris Wilson <chris@chris-wilson.co.uk>
Cc: intel-gfx@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org
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