[Bug 98804] New: WARN_ON(reg->pin_count) during IGT

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98804

            Bug ID: 98804
           Summary: WARN_ON(reg->pin_count) during IGT
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: tvrtko.ursulin at linux.intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 128097
  --> https://bugs.freedesktop.org/attachment.cgi?id=128097&action=edit
dmesg 1

With the current nightly I can get the below trace in so far two different
scenarios. First is while running the BAT suite in which case it happens during
the kms_busy/basic-flip-default-C subtest, and I also got it while running test
manually while running kms_setmode/basic. 

[ 1915.935231] [drm:intel_runtime_suspend [i915]] Suspending device
[ 1915.935248] ------------[ cut here ]------------
[ 1915.935332] WARNING: CPU: 1 PID: 10861 at
drivers/gpu/drm/i915/i915_gem.c:2022 i915_gem_runtime_suspend+0x116/0x130
[i915]
[ 1915.935383] WARN_ON(reg->pin_count)[ 1915.935399] Modules linked in:
 snd_hda_intel i915 drm_kms_helper vgem netconsole scsi_transport_iscsi fuse
vfat fat x86_pkg_temp_thermal coretemp intel_cstate intel_uncore
snd_hda_codec_hdmi snd_hda_codec_generic snd_hda_codec snd_hwdep snd_hda_core
snd_pcm snd_timer snd mei_me mei serio_raw intel_rapl_perf intel_pch_thermal
soundcore wmi acpi_pad i2c_algo_bit syscopyarea sysfillrect sysimgblt
fb_sys_fops drm r8169 mii video [last unloaded: drm_kms_helper]
[ 1915.935785] CPU: 1 PID: 10861 Comm: kworker/1:0 Tainted: G     U  W      
4.9.0-rc5+ #170
[ 1915.935799] Hardware name: LENOVO 80MX/Lenovo E31-80, BIOS DCCN34WW(V2.03)
12/01/2015
[ 1915.935822] Workqueue: pm pm_runtime_work
[ 1915.935845]  ffffc900044fbbf0 ffffffffac3220bc ffffc900044fbc40
0000000000000000
[ 1915.935890]  ffffc900044fbc30 ffffffffac059bcb 000007e6044fbc60
ffff8801626e3198
[ 1915.935937]  ffff8801626e0000 0000000000000002 ffffffffc05e5d4e
0000000000000000
[ 1915.935985] Call Trace:
[ 1915.936013]  [<ffffffffac3220bc>] dump_stack+0x4f/0x73
[ 1915.936038]  [<ffffffffac059bcb>] __warn+0xcb/0xf0
[ 1915.936060]  [<ffffffffac059c4f>] warn_slowpath_fmt+0x5f/0x80
[ 1915.936158]  [<ffffffffc052d916>] i915_gem_runtime_suspend+0x116/0x130
[i915]
[ 1915.936251]  [<ffffffffc04f1c74>] intel_runtime_suspend+0x64/0x280 [i915]
[ 1915.936277]  [<ffffffffac0926f1>] ? dequeue_entity+0x241/0xbc0
[ 1915.936298]  [<ffffffffac36bb85>] pci_pm_runtime_suspend+0x55/0x180
[ 1915.936317]  [<ffffffffac36bb30>] ? pci_pm_runtime_resume+0xa0/0xa0
[ 1915.936339]  [<ffffffffac4514e2>] __rpm_callback+0x32/0x70
[ 1915.936356]  [<ffffffffac451544>] rpm_callback+0x24/0x80
[ 1915.936375]  [<ffffffffac36bb30>] ? pci_pm_runtime_resume+0xa0/0xa0
[ 1915.936392]  [<ffffffffac45222d>] rpm_suspend+0x12d/0x680
[ 1915.936415]  [<ffffffffac69f6d7>] ? _raw_spin_unlock_irq+0x17/0x30
[ 1915.936435]  [<ffffffffac0810b8>] ? finish_task_switch+0x88/0x220
[ 1915.936455]  [<ffffffffac4534bf>] pm_runtime_work+0x6f/0xb0
[ 1915.936477]  [<ffffffffac074353>] process_one_work+0x1f3/0x4d0
[ 1915.936501]  [<ffffffffac074678>] worker_thread+0x48/0x4e0
[ 1915.936523]  [<ffffffffac074630>] ? process_one_work+0x4d0/0x4d0
[ 1915.936542]  [<ffffffffac074630>] ? process_one_work+0x4d0/0x4d0
[ 1915.936559]  [<ffffffffac07a2c9>] kthread+0xd9/0xf0
[ 1915.936580]  [<ffffffffac07a1f0>] ? kthread_park+0x60/0x60
[ 1915.936600]  [<ffffffffac69fe62>] ret_from_fork+0x22/0x30
[ 1915.936646] ---[ end trace f9357374d2333f67 ]---
[ 1915.940175] [drm:intel_runtime_suspend [i915]] Device suspended

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