[Bug 76544] New: [HSW Regression]igt/kms_cursor_crc causes calltrace

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76544

          Priority: high
            Bug ID: 76544
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [HSW Regression]igt/kms_cursor_crc causes calltrace
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 96274
  --> https://bugs.freedesktop.org/attachment.cgi?id=96274&action=edit
dmesg

System Environment:
--------------------------
Platform: Haswell
Kernel:   drm-intel-next-queued/56da08b36ee58a58723fe1bfb5fbe624a7442689/

Bug detailed description:
-----------------------------
Run ./kms_cursor_crc on Haswell with -queued kernel, call trace reports in
dmesg.

The latest known good commit: 484b41dd70a9fbea894632d8926bbb93f05021c7
The latest known bad commit: 56da08b36ee58a58723fe1bfb5fbe624a7442689

[   89.802315] WARNING: CPU: 4 PID: 781 at
drivers/gpu/drm/i915/intel_display.c:6882 hsw_enable_pc8+0xcf/0x626 [i915]()
[   89.802344] CRTC for pipe A enabled
[   89.802354] Modules linked in: dm_mod snd_hda_codec_realtek
snd_hda_codec_generic snd_hda_codec_hdmi pcspkr serio_raw i2c_i801 iTCO_wdt
iTCO_vendor_support lpc_ich mfd_core snd_hda_intel snd_hda_codec snd_hwdep
snd_pcm snd_timer snd soundcore battery tpm_infineon tpm_tis tpm wmi
acpi_cpufreq i915 video button drm_kms_helper drm
[   89.802470] CPU: 4 PID: 781 Comm: kworker/4:1 Not tainted
3.14.0-rc7_drm-intel-nightly_ef4aa4_20140323+ #942
[   89.802496] Hardware name: ASUS All Series/Z87-EXPERT, BIOS 1008 05/17/2013
[   89.802517] Workqueue: pm pm_runtime_work
[   89.802529]  0000000000000000 0000000000000009 ffffffff81716de3
ffff880255e7bc88
[   89.802553]  ffffffff81035052 ffffc900090c4024 ffffffffa009e9d6
0000000000000000
[   89.802578]  ffff88025114c000 ffff88025586d000 ffff8802514a2b00
ffff880256317098
[   89.802601] Call Trace:
[   89.802612]  [<ffffffff81716de3>] ? dump_stack+0x41/0x51
[   89.802629]  [<ffffffff81035052>] ? warn_slowpath_common+0x73/0x8b
[   89.802650]  [<ffffffffa009e9d6>] ? hsw_enable_pc8+0xcf/0x626 [i915]
[   89.802669]  [<ffffffff81035102>] ? warn_slowpath_fmt+0x45/0x4a
[   89.802689]  [<ffffffffa009e9d6>] ? hsw_enable_pc8+0xcf/0x626 [i915]
[   89.802710]  [<ffffffffa00600f3>] ? i915_runtime_suspend+0x62/0xb1 [i915]
[   89.802732]  [<ffffffff812f8728>] ? pci_pm_runtime_suspend+0x60/0x119
[   89.802750]  [<ffffffff81383e2e>] ? __rpm_callback+0x28/0x4c
[   89.802766]  [<ffffffff81383e9d>] ? rpm_callback+0x4b/0x69
[   89.802781]  [<ffffffff81384449>] ? rpm_suspend+0x2a9/0x3f9
[   89.802798]  [<ffffffff8103c75e>] ? internal_add_timer+0xd/0x28
[   89.802814]  [<ffffffff8103cf3f>] ? mod_timer+0x125/0x13d
[   89.802829]  [<ffffffff813850e9>] ? pm_runtime_work+0x65/0x7b
[   89.802847]  [<ffffffff81046660>] ? process_one_work+0x1bc/0x2ed
[   89.802863]  [<ffffffff810445c0>] ? pwq_activate_delayed_work+0x1e/0x28
[   89.802883]  [<ffffffff81046bce>] ? worker_thread+0x1c7/0x2bc
[   89.802899]  [<ffffffff81046a07>] ? rescuer_thread+0x251/0x251
[   89.802916]  [<ffffffff8104b53e>] ? kthread+0xc5/0xcd
[   89.802932]  [<ffffffff8104b479>] ? kthread_freezable_should_stop+0x40/0x40
[   89.802951]  [<ffffffff817213fc>] ? ret_from_fork+0x7c/0xb0
[   89.802968]  [<ffffffff8104b479>] ? kthread_freezable_should_stop+0x40/0x40
[   89.802987] ---[ end trace 7da3cc66c49a1c38 ]---


Reproduce steps:
---------------------------- 
1. ./kms_cursor_crc

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