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 v4 5/5] drm/i915: Solve the GPU reset vs. modeset
 deadlocks with an rw_semaphore
Date: Thu, 29 Jun 2017 22:26:08 +0300
Message-ID: <20170629192608.GF12629@intel.com>
References: <20170629134948.5614-6-ville.syrjala@linux.intel.com>
 <20170629143642.28221-1-ville.syrjala@linux.intel.com>
 <149875905040.25198.11560401593791605431@mail.alporthouse.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <dri-devel-bounces@lists.freedesktop.org>
Content-Disposition: inline
In-Reply-To: <149875905040.25198.11560401593791605431@mail.alporthouse.com>
List-Unsubscribe: <https://lists.freedesktop.org/mailman/options/dri-devel>,
 <mailto:dri-devel-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <https://lists.freedesktop.org/archives/dri-devel>
List-Post: <mailto:dri-devel@lists.freedesktop.org>
List-Help: <mailto:dri-devel-request@lists.freedesktop.org?subject=help>
List-Subscribe: <https://lists.freedesktop.org/mailman/listinfo/dri-devel>,
 <mailto:dri-devel-request@lists.freedesktop.org?subject=subscribe>
Errors-To: dri-devel-bounces@lists.freedesktop.org
Sender: "dri-devel" <dri-devel-bounces@lists.freedesktop.org>
To: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>, intel-gfx@lists.freedesktop.org, stable@vger.kernel.org, dri-devel@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org
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