From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934126AbcIFJOP (ORCPT ); Tue, 6 Sep 2016 05:14:15 -0400 Received: from mga14.intel.com ([192.55.52.115]:1096 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933774AbcIFJNP (ORCPT ); Tue, 6 Sep 2016 05:13:15 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.30,291,1470726000"; d="scan'208";a="1051944059" From: Jani Nikula To: linux@eikelenboom.it, Daniel Vetter , Lyude Cc: intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: Re: [Intel-gfx] Linux 4.8-rc?: WARNING: at drivers/gpu/drm/i915/intel_pm.c:7866 sandybridge_pcode_write Missing switch case (16) in gen6_check_mailbox_status In-Reply-To: Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: User-Agent: Notmuch/0.22.1+63~g648dcc7 (https://notmuchmail.org) Emacs/24.4.1 (x86_64-pc-linux-gnu) Date: Tue, 06 Sep 2016 12:12:33 +0300 Message-ID: <87vay9xugu.fsf@intel.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Lyude, this is due to commit 87660502f1a4d51fb043e89a45d30c9917787c22 Author: Lyude Date: Wed Aug 17 15:55:53 2016 -0400 drm/i915/gen6+: Interpret mailbox error flags and on its way to stable. BR, Jani. On Tue, 06 Sep 2016, linux@eikelenboom.it wrote: > L.S., > > Since one of the last 4.8 RC's i'm getting the warning below when > booting on my sandybridge based thinkpad. > From what it seems the machine still works fine though. > > -- > Sander > > [ 2.846265] ------------[ cut here ]------------ > [ 2.846280] WARNING: CPU: 0 PID: 4 at > drivers/gpu/drm/i915/intel_pm.c:7866 sandybridge_pcode_write+0x104/0x1e0 > [ 2.846282] Missing switch case (16) in gen6_check_mailbox_status > [ 2.846284] Modules linked in: > [ 2.846289] CPU: 0 PID: 4 Comm: kworker/0:0 Not tainted > 4.8.0-rc5-x220-20160905+ #1 > [ 2.846290] Hardware name: LENOVO 42912ZU/42912ZU, BIOS 8DET69WW > (1.39 ) 07/18/2013 > [ 2.846297] Workqueue: events intel_gen6_powersave_work > [ 2.846302] 0000000000000000 ffffffff8138bd84 ffff88030fd7bd78 > 0000000000000000 > [ 2.846305] ffffffff81062d84 ffff88030d490000 ffff88030fd7bdc8 > 0000000000000000 > [ 2.846308] ffff88030d49a438 ffff88030d498830 0000000000000000 > ffffffff81062dea > [ 2.846309] Call Trace: > [ 2.846319] [] ? dump_stack+0x5c/0x78 > [ 2.846324] [] ? __warn+0xb4/0xd0 > [ 2.846328] [] ? warn_slowpath_fmt+0x4a/0x50 > [ 2.846333] [] ? > sandybridge_pcode_write+0x104/0x1e0 > [ 2.846338] [] ? > intel_gen6_powersave_work+0x2a3/0x1400 > [ 2.846344] [] ? process_one_work+0x1ba/0x3d0 > [ 2.846348] [] ? worker_thread+0x45/0x4e0 > [ 2.846351] [] ? process_one_work+0x3d0/0x3d0 > [ 2.846355] [] ? kthread+0xb8/0xd0 > [ 2.846362] [] ? ret_from_fork+0x1f/0x40 > [ 2.846365] [] ? kthread_worker_fn+0x180/0x180 > [ 2.846368] ---[ end trace da7b2ca8a6654bfa ]--- > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Jani Nikula, Intel Open Source Technology Center