[Bug 89119] New: [SKL]igt/drv_hangman causes gen6_rps_irq_handler+0x38/0xfb [i915]()

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89119

            Bug ID: 89119
           Summary: [SKL]igt/drv_hangman causes
                    gen6_rps_irq_handler+0x38/0xfb [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 113439
  --> https://bugs.freedesktop.org/attachment.cgi?id=113439&action=edit
dmesg

System Environment:
--------------------------
Regression: not sure

no-working platforms: SKL

==kernel==
--------------------------
drm-intel-nightly/2a579576e4c01799ec67264c9169e5adeadcc3ff
commit 2a579576e4c01799ec67264c9169e5adeadcc3ff
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Wed Feb 11 17:16:34 2015 +0100

    drm-intel-nightly: 2015y-02m-11d-16h-11m-28s UTC integration manifest

==Bug detailed description==
-----------------------------
drv_hangman causes  WARNING: CPU: 2 PID: 0 at
drivers/gpu/drm/i915/i915_irq.c:1750 gen6_rps_irq_handler+0x38/0xfb [i915]()

output:
./drv_hangman --run-subtest error-state-capture-render
IGT-Version: 1.9-g9846e7f (x86_64) (Linux:
3.19.0_drm-intel-nightly_2a5795_20150212+ x86_64)
Subtest error-state-capture-render: SUCCESS (7.243s)

real    0m7.503s
user    0m0.004s
sys     0m1.118s


[  171.734134] WARNING: CPU: 2 PID: 0 at drivers/gpu/drm/i915/i915_irq.c:1750
gen6_rps_irq_handler+0x38/0xfb [i915]()
[  171.734137] GEN9+: unexpected RPS IRQ
[  171.734140] Modules linked in: dm_mod snd_hda_codec_realtek
snd_hda_codec_generic ppdev snd_hda_intel snd_hda_controller snd_hda_codec
snd_hwdep snd_pcm i2c_i801 pcspkr snd_timer snd soundcore wmi battery
parport_pc parport ac acpi_cpufreq i915 button video drm_kms_helper drm
cfbfillrect cfbimgblt cfbcopyarea
[  171.734170] CPU: 2 PID: 0 Comm: swapper/2 Not tainted
3.19.0_drm-intel-nightly_2a5795_20150212+ #358
[  171.734174] Hardware name: Intel Corporation Skylake Client platform/Skylake
Y LPDDR3 RVP3, BIOS SKLSE2R1.86C.B069.R00.1501192136 01/19/2015
[  171.734177]  0000000000000000 0000000000000009 ffffffff8179a941
ffff88014e483de8
[  171.734182]  ffffffff8103be7c 00000002492c7e32 ffffffffa00b4b68
0000000000200000
[  171.734187]  ffff880004dd0000 0000000000000001 0000000000000040
0000000000000010
[  171.734192] Call Trace:
[  171.734195]  <IRQ>  [<ffffffff8179a941>] ? dump_stack+0x40/0x50
[  171.734210]  [<ffffffff8103be7c>] ? warn_slowpath_common+0x98/0xb0
[  171.734233]  [<ffffffffa00b4b68>] ? gen6_rps_irq_handler+0x38/0xfb [i915]
[  171.734240]  [<ffffffff8103bf2c>] ? warn_slowpath_fmt+0x45/0x4a
[  171.734265]  [<ffffffffa00c6979>] ? gen9_write32+0x79/0x29a [i915]
[  171.734286]  [<ffffffffa00b4b68>] ? gen6_rps_irq_handler+0x38/0xfb [i915]
[  171.734306]  [<ffffffffa00b5a6b>] ? gen8_gt_irq_handler.isra.15+0x192/0x21d
[i915]
[  171.734325]  [<ffffffffa00b5b77>] ? gen8_irq_handler+0x81/0x334 [i915]
[  171.734333]  [<ffffffff810721fb>] ? handle_irq_event_percpu+0x4f/0x179
[  171.734339]  [<ffffffff81072353>] ? handle_irq_event+0x2e/0x4f
[  171.734344]  [<ffffffff81074789>] ? handle_edge_irq+0xbc/0xd1
[  171.734349]  [<ffffffff81004295>] ? handle_irq+0x15/0x20
[  171.734353]  [<ffffffff81003d5a>] ? do_IRQ+0x41/0xc0
[  171.734358]  [<ffffffff817a0e6a>] ? common_interrupt+0x6a/0x6a
[  171.734361]  <EOI>  [<ffffffff816b2d45>] ? cpuidle_enter_state+0xa5/0x129
[  171.734369]  [<ffffffff816b2d11>] ? cpuidle_enter_state+0x71/0x129
[  171.734376]  [<ffffffff8106569b>] ? cpu_startup_entry+0x1db/0x2e0
[  171.734381] ---[ end trace 6678a153af05bd0c ]---

==Reproduce steps==
---------------------------- 
1. ./drv_hangman --run-subtest error-state-capture-render

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