From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jani Nikula <jani.nikula@intel.com>
Subject: Re: [PATCH] drm/i915: Distinguish between timeout and
	error in sideband transactions
Date: Mon, 27 Feb 2017 18:34:26 +0200
Message-ID: <87wpcbvbhp.fsf@intel.com>
References: <20170223141020.13250-1-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 mga02.intel.com (mga02.intel.com [134.134.136.20])
 by gabe.freedesktop.org (Postfix) with ESMTPS id CD85C6E30F
 for <intel-gfx@lists.freedesktop.org>; Mon, 27 Feb 2017 16:34:30 +0000 (UTC)
In-Reply-To: <20170223141020.13250-1-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>, intel-gfx@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org
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