[Bug 89626] New: [all]igt/drv_suspend/forcewake causes WARNING: CPU: 5 PID: 4366 at drivers/gpu/drm/i915/intel_uncore.c:463 assert_forcewakes_inactive+0x57/0x6d [i915]()

Tue Mar 17 22:31:32 PDT 2015

https://bugs.freedesktop.org/show_bug.cgi?id=89626

            Bug ID: 89626
           Summary: [all]igt/drv_suspend/forcewake causes WARNING: CPU: 5
                    PID: 4366 at drivers/gpu/drm/i915/intel_uncore.c:463
                    assert_forcewakes_inactive+0x57/0x6d [i915]()
           Product: DRI
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: huax.lu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 114415
  --> https://bugs.freedesktop.org/attachment.cgi?id=114415&action=edit
dmesg

==System Environment==
--------------------------
Regression:  not sure, new case in recently.

no-working platforms: all

==kernel==
--------------------------
drm-intel-nightly/3753ea527e539d3358a6368e77cb29ecb2e71c42
commit 3753ea527e539d3358a6368e77cb29ecb2e71c42
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Tue Mar 17 22:36:04 2015 +0100

    drm-intel-nightly: 2015y-03m-17d-21h-35m-20s UTC integration manifest

==Bug detailed description==
-----------------------------
It causes WARNING: CPU: 5 PID: 4366 at drivers/gpu/drm/i915/intel_uncore.c:463
assert_forcewakes_inactive+0x57/0x6d [i915]().
drv_suspend/forcewake-hibernate also has this warning.

output:
IGT-Version: 1.10-g505645c (x86_64) (Linux:
4.0.0-rc4_drm-intel-nightly_3753ea_20150318+ x86_64)
rtcwake: assuming RTC uses UTC ...
rtcwake: wakeup from "mem" using /dev/rtc0 at Wed Mar 18 13:07:45 2015
Subtest forcewake: SUCCESS (1.207s)

real    0m35.535s
user    0m0.005s
sys     0m0.176s

[ 6932.984168] ------------[ cut here ]------------
[ 6932.984185] WARNING: CPU: 5 PID: 4366 at
drivers/gpu/drm/i915/intel_uncore.c:463 assert_forcewakes_inactive+0x57/0x6d
[i915]()
[ 6932.984185] WARN_ON(domain->wake_count)
[ 6932.984193] Modules linked in: dm_mod snd_hda_codec_hdmi
snd_hda_codec_realtek iTCO_wdt iTCO_vendor_support snd_hda_codec_generic ppdev
dcdbas serio_raw pcspkr i2c_i801 snd_hda_intel snd_hda_controller snd_hda_codec
snd_hwdep snd_pcm lpc_ich snd_timer mfd_core snd soundcore parport_pc tpm_tis
parport tpm acpi_cpufreq i915 button video drm_kms_helper drm
[ 6932.984195] CPU: 5 PID: 4366 Comm: kworker/u32:13 Not tainted
4.0.0-rc4_drm-intel-nightly_3753ea_20150318+ #60
[ 6932.984195] Hardware name: Dell Inc. OptiPlex 990/0DXWW6, BIOS A02
02/26/2011
[ 6932.984199] Workqueue: events_unbound async_run_entry_fn
[ 6932.984200]  0000000000000000 0000000000000009 ffffffff817942e1
ffff8800020b7c18
[ 6932.984201]  ffffffff8103bd5a 0000000000000002 ffffffffa00bc858
0000000000000082
[ 6932.984202]  ffff880002cf0000 0000000000000000 ffff880002cf0130
0000000000000001
[ 6932.984202] Call Trace:
[ 6932.984206]  [<ffffffff817942e1>] ? dump_stack+0x40/0x50
[ 6932.984208]  [<ffffffff8103bd5a>] ? warn_slowpath_common+0x98/0xb0
[ 6932.984215]  [<ffffffffa00bc858>] ? assert_forcewakes_inactive+0x57/0x6d
[i915]
[ 6932.984217]  [<ffffffff8103bdb7>] ? warn_slowpath_fmt+0x45/0x4a
[ 6932.984224]  [<ffffffffa00bc858>] ? assert_forcewakes_inactive+0x57/0x6d
[i915]
[ 6932.984230]  [<ffffffffa00bcac6>] ? intel_uncore_forcewake_reset+0x258/0x25a
[i915]
[ 6932.984236]  [<ffffffffa007a897>] ? i915_drm_suspend+0x16c/0x1a1 [i915]
[ 6932.984239]  [<ffffffff8135f79e>] ? pci_pm_suspend+0x79/0xf6
[ 6932.984240]  [<ffffffff8135f725>] ? pci_pm_freeze+0xa4/0xa4
[ 6932.984242]  [<ffffffff813f1fcd>] ? dpm_run_callback+0x3a/0xc5
[ 6932.984243]  [<ffffffff813f293b>] ? __device_suspend+0x1d1/0x25d
[ 6932.984244]  [<ffffffff813f29dd>] ? async_suspend+0x16/0x7d
[ 6932.984245]  [<ffffffff81052783>] ? async_run_entry_fn+0x2d/0xbf
[ 6932.984248]  [<ffffffff8104ca7f>] ? process_one_work+0x1b2/0x31d
[ 6932.984250]  [<ffffffff8104d278>] ? worker_thread+0x24d/0x339
[ 6932.984251]  [<ffffffff8104d02b>] ? cancel_delayed_work_sync+0xa/0xa
[ 6932.984252]  [<ffffffff81050b25>] ? kthread+0xce/0xd6
[ 6932.984254]  [<ffffffff81050a57>] ? kthread_create_on_node+0x162/0x162
[ 6932.984255]  [<ffffffff81799ac8>] ? ret_from_fork+0x58/0x90
[ 6932.984256]  [<ffffffff81050a57>] ? kthread_create_on_node+0x162/0x162
[ 6932.984257] ---[ end trace f35c08b9934ac932 ]---


==Reproduce steps==
---------------------------- 
1. ./drv_suspend --run-subtest forcewake

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