From mboxrd@z Thu Jan  1 00:00:00 1970
From: Daniel Vetter <daniel@ffwll.ch>
Subject: Re: [PATCH 1/4] drm/i915/fbdev: Use an ordinary worker
 to avoid async deadlock
Date: Fri, 19 Oct 2018 10:23:54 +0200
Message-ID: <20181019082354.GU31561@phenom.ffwll.local>
References: <20181015111742.17681-1-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 mail-ed1-x541.google.com (mail-ed1-x541.google.com
 [IPv6:2a00:1450:4864:20::541])
 by gabe.freedesktop.org (Postfix) with ESMTPS id 2D4CD6E15C
 for <intel-gfx@lists.freedesktop.org>; Fri, 19 Oct 2018 08:23:58 +0000 (UTC)
Received: by mail-ed1-x541.google.com with SMTP id c22-v6so30665212edc.4
 for <intel-gfx@lists.freedesktop.org>; Fri, 19 Oct 2018 01:23:58 -0700 (PDT)
Content-Disposition: inline
In-Reply-To: <20181015111742.17681-1-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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