From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762711AbcALPHw (ORCPT ); Tue, 12 Jan 2016 10:07:52 -0500 Received: from mail-pa0-f41.google.com ([209.85.220.41]:33350 "EHLO mail-pa0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762697AbcALPHu (ORCPT ); Tue, 12 Jan 2016 10:07:50 -0500 Date: Wed, 13 Jan 2016 00:06:07 +0900 From: Sergey Senozhatsky To: Imre Deak Cc: Daniel Vetter , David Airlie , Chris Wilson , Joonas Lahtinen , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: RPM wakelock ref not held during HW access Message-ID: <20160112150607.GB670@swordfish> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, -mmots 4.4.0-mm1-dbg-00602-g776bd09 [ 5331.509087] WARNING: CPU: 0 PID: 359 at drivers/gpu/drm/i915/intel_drv.h:1446 gen6_read32+0x7b/0x253 [i915]() [ 5331.509091] RPM wakelock ref not held during HW access [ 5331.509093] Modules linked in: [ 5331.509182] CPU: 0 PID: 359 Comm: Xorg Not tainted 4.4.0-mm1-dbg-00602-g776bd09-dirty #34 [ 5331.509186] 0000000000000000 ffff88041bddfac0 ffffffff811eb860 ffff88041bddfb08 [ 5331.509194] ffff88041bddfaf8 ffffffff81040fc2 ffffffffa05442a9 ffff88041aab0000 [ 5331.509200] 0000000000064000 ffff88041afcb001 0000000000000001 ffff88041bddfb60 [ 5331.509207] Call Trace: [ 5331.509218] [] dump_stack+0x4b/0x63 [ 5331.509227] [] warn_slowpath_common+0x99/0xb2 [ 5331.509277] [] ? gen6_read32+0x7b/0x253 [i915] [ 5331.509283] [] warn_slowpath_fmt+0x48/0x50 [ 5331.509331] [] gen6_read32+0x7b/0x253 [i915] [ 5331.509338] [] ? mutex_unlock+0xe/0x10 [ 5331.509391] [] intel_ddi_get_hw_state+0x5e/0x159 [i915] [ 5331.509443] [] intel_ddi_connector_get_hw_state+0x5c/0xdf [i915] [ 5331.509494] [] intel_atomic_commit+0x8e0/0x1250 [i915] [ 5331.509528] [] ? drm_atomic_check_only+0x293/0x564 [drm] [ 5331.509558] [] drm_atomic_commit+0x4d/0x52 [drm] [ 5331.509572] [] drm_atomic_helper_connector_dpms+0x116/0x17e [drm_kms_helper] [ 5331.509599] [] drm_mode_obj_set_property_ioctl+0xef/0x17a [drm] [ 5331.509626] [] drm_mode_connector_property_set_ioctl+0x30/0x32 [drm] [ 5331.509642] [] drm_ioctl+0x26d/0x3a8 [drm] [ 5331.509668] [] ? drm_mode_obj_set_property_ioctl+0x17a/0x17a [drm] [ 5331.509675] [] ? lock_acquire+0x101/0x188 [ 5331.509681] [] ? __fget+0x5/0x19d [ 5331.509685] [] ? __lock_is_held+0x3c/0x57 [ 5331.509691] [] vfs_ioctl+0x18/0x34 [ 5331.509695] [] do_vfs_ioctl+0x572/0x5f1 [ 5331.509699] [] ? __fget_light+0x62/0x71 [ 5331.509704] [] SyS_ioctl+0x43/0x61 [ 5331.509711] [] entry_SYSCALL_64_fastpath+0x12/0x6f [ 5331.509715] ---[ end trace 70d4fd86a0395d92 ]--- -ss