linux-kernel - [lkp] [drm/i915] 099b7960d3: WARNING: CPU: 4 PID: 664 at drivers/gpu/drm/i915/intel_uncore.c:548 assert_forcewakes

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Date:	Thu, 31 Mar 2016 10:42:33 +0800
From:	kernel test robot <xiaolong.ye@...el.com>
To:	Chris Wilson <chris@...is-wilson.co.uk>
Cc:	0day robot <fengguang.wu@...el.com>,
	Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
	Mika Kuoppala <mika.kuoppala@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [lkp] [drm/i915] 099b7960d3: WARNING: CPU: 4 PID: 664 at
 drivers/gpu/drm/i915/intel_uncore.c:548 assert_forcewakes_inactive+0x84/0x90
 [i915]()

FYI, we noticed the below changes on

https://github.com/0day-ci/linux Chris-Wilson/drm-i915-Only-arm-the-forcewake-release-timer-on-the-final-put/20160324-215801
commit 099b7960d3785a64ff959e79fe75a510a09a6302 ("drm/i915: Only arm the forcewake release timer on the final put")

As below, the log "WARNING: CPU: 4 PID: 664 at drivers/gpu/drm/i915/intel_uncore.c:548 assert_forcewakes_inactive+0x84/0x90 [i915]()" showed with your commit.

<5>[   30.841183] sd 0:0:0:0: [sda] Stopping disk
<6>[   30.844768] e1000e: EEE TX LPI TIMER: 00000011
<4>[   30.846301] ------------[ cut here ]------------
<4>[   30.846329] WARNING: CPU: 4 PID: 664 at drivers/gpu/drm/i915/intel_uncore.c:548 assert_forcewakes_inactive+0x84/0x90 [i915]()
<4>[   30.846330] WARN_ON(domain->wake_count)
<4>[   30.846346] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver sg sd_mod snd_hda_codec_hdmi x86_pkg_temp_thermal coretemp snd_hda_codec_realtek snd_hda_codec_generic kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel firewire_ohci aesni_intel lrw gf128mul glue_helper snd_hda_intel ablk_helper cryptd serio_raw pcspkr ppdev ahci i915 firewire_core snd_hda_codec libahci crc_itu_t snd_hda_core snd_hwdep snd_pcm libata snd_timer snd video shpchp soundcore drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm parport_pc parport nuvoton_cir rc_core
<4>[   30.846348] CPU: 4 PID: 664 Comm: kworker/u16:20 Not tainted 4.5.0-rc7-01401-g099b796 #1
<4>[   30.846348] Hardware name:                  /DH67GD, BIOS BLH6710H.86A.0132.2011.1007.1505 10/07/2011
<4>[   30.846352] Workqueue: events_unbound async_run_entry_fn
<4>[   30.846353]  0000000000000000 ffff8800bce77ba0 ffffffff8142612a ffff8800bce77be8
<4>[   30.846354]  ffffffffa0369570 ffff8800bce77bd8 ffffffff81079fe6 ffff88021d2900e0
<4>[   30.846355]  0000000000000000 ffff88021d290000 000077fde2d70078 ffff88021d290000
<4>[   30.846356] Call Trace:
<4>[   30.846360]  [<ffffffff8142612a>] dump_stack+0x63/0x89
<4>[   30.846363]  [<ffffffff81079fe6>] warn_slowpath_common+0x86/0xc0
<4>[   30.846364]  [<ffffffff8107a06c>] warn_slowpath_fmt+0x4c/0x50
<4>[   30.846377]  [<ffffffffa02e01c4>] assert_forcewakes_inactive+0x84/0x90 [i915]
<4>[   30.846389]  [<ffffffffa02e0404>] intel_uncore_forcewake_reset+0x234/0x330 [i915]
<4>[   30.846399]  [<ffffffffa0281d9c>] i915_drm_suspend+0x12c/0x1b0 [i915]
<4>[   30.846408]  [<ffffffffa0281e4f>] i915_pm_suspend+0x2f/0x50 [i915]
<4>[   30.846410]  [<ffffffff8146f0c6>] pci_pm_suspend+0x76/0x140
<4>[   30.846411]  [<ffffffff8146f050>] ? pci_pm_freeze+0xe0/0xe0
<4>[   30.846413]  [<ffffffff8158202c>] dpm_run_callback+0x4c/0x150
<4>[   30.846414]  [<ffffffff81582b64>] __device_suspend+0xf4/0x300
<4>[   30.846414]  [<ffffffff81582d8f>] async_suspend+0x1f/0xa0
<4>[   30.846416]  [<ffffffff8109b19a>] async_run_entry_fn+0x4a/0x140
<4>[   30.846417]  [<ffffffff81092365>] process_one_work+0x155/0x440
<4>[   30.846419]  [<ffffffff81092fae>] worker_thread+0x4e/0x4c0
<4>[   30.846420]  [<ffffffff81092f60>] ? rescuer_thread+0x350/0x350
<4>[   30.846421]  [<ffffffff81098554>] kthread+0xd4/0xf0
<4>[   30.846422]  [<ffffffff81098480>] ? kthread_park+0x60/0x60
<4>[   30.846424]  [<ffffffff818e5e3f>] ret_from_fork+0x3f/0x70
<4>[   30.846425]  [<ffffffff81098480>] ? kthread_park+0x60/0x60
<4>[   30.846426] ---[ end trace a8ed49e006bcbdac ]---
<6>[   31.054012] PM: suspend of devices complete after 212.947 msecs


To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Xiaolong Ye

View attachment "config-4.5.0-rc7-01401-g099b796" of type "text/plain" (145535 bytes)

Download attachment "kmsg.xz" of type "application/octet-stream" (22712 bytes)

View attachment "job.yaml" of type "text/plain" (2857 bytes)

View attachment "reproduce" of type "text/plain" (196 bytes)