From mboxrd@z Thu Jan  1 00:00:00 1970
From: Chris Wilson <chris@chris-wilson.co.uk>
Subject: Re: [PATCH 1/3] drm/i915: Short-circuit
 i915_gem_wait_for_idle() if already idle
Date: Tue, 30 May 2017 13:46:42 +0100
Message-ID: <20170530124642.GK23936@nuc-i3427.alporthouse.com>
References: <20170530121334.17364-1-chris@chris-wilson.co.uk>
 <1496148075.3977.22.camel@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 5D87489E52
 for <intel-gfx@lists.freedesktop.org>; Tue, 30 May 2017 12:46:49 +0000 (UTC)
Content-Disposition: inline
In-Reply-To: <1496148075.3977.22.camel@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: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org
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