From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965366AbdDSPUT (ORCPT ); Wed, 19 Apr 2017 11:20:19 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:46228 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935291AbdDSOjs (ORCPT ); Wed, 19 Apr 2017 10:39:48 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Min He , Zhenyu Wang Subject: [PATCH 4.10 51/69] drm/i915/gvt: set the correct default value of CTX STATUS PTR Date: Wed, 19 Apr 2017 16:37:20 +0200 Message-Id: <20170419141557.246296684@linuxfoundation.org> X-Mailer: git-send-email 2.12.2 In-Reply-To: <20170419141555.114738231@linuxfoundation.org> References: <20170419141555.114738231@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Min He commit a34f83639490a5cc11a9d5c1b3773d4b6eb69a9e upstream. Fix wrong initial csb read pointer value. This fixes the random engine timeout issue in guest when guest boots up. Fixes: 8453d674ae7e ("drm/i915/gvt: vGPU execlist virtualization") Signed-off-by: Min He Signed-off-by: Zhenyu Wang Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/gvt/execlist.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/i915/gvt/execlist.c +++ b/drivers/gpu/drm/i915/gvt/execlist.c @@ -778,7 +778,8 @@ static void init_vgpu_execlist(struct in _EL_OFFSET_STATUS_PTR); ctx_status_ptr.dw = vgpu_vreg(vgpu, ctx_status_ptr_reg); - ctx_status_ptr.read_ptr = ctx_status_ptr.write_ptr = 0x7; + ctx_status_ptr.read_ptr = 0; + ctx_status_ptr.write_ptr = 0x7; vgpu_vreg(vgpu, ctx_status_ptr_reg) = ctx_status_ptr.dw; }