[Bug 102692] New: [CI][HSW] igt at kms_busy@extended-modeset-hang-oldfb-with-reset-render-B dmesg-warn: Unclaimed read from register 0x70008

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102692

            Bug ID: 102692
           Summary: [CI][HSW]
                    igt at kms_busy@extended-modeset-hang-oldfb-with-reset-re
                    nder-B dmesg-warn: Unclaimed read from register
                    0x70008
           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: marta.lofstedt at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Starting at CI_DRM_3078 and so far on the 3 consecutive runs on the HSW-shards
igt at kms_busy@extended-modeset-hang-oldfb-with-reset-render-B

[  140.395197] Setting dangerous option reset - tainting kernel
[  140.395459] Setting dangerous option reset - tainting kernel
[  140.395661] Setting dangerous option force_reset_modeset_test - tainting
kernel
[  155.791677] i915 0000:00:02.0: Resetting chip after gpu hang
[  155.793296] Unclaimed read from register 0x70008
[  155.793346] ------------[ cut here ]------------
[  155.793372] WARNING: CPU: 1 PID: 1575 at
drivers/gpu/drm/i915/intel_uncore.c:843 __unclaimed_reg_debug+0x47/0x60 [i915]
[  155.793375] Modules linked in: vgem snd_hda_codec_hdmi i915
x86_pkg_temp_thermal snd_hda_codec_realtek intel_powerclamp
snd_hda_codec_generic coretemp snd_hda_intel crct10dif_pclmul snd_hda_codec
crc32_pclmul snd_hwdep ghash_clmulni_intel snd_hda_core r8169 mii snd_pcm
mei_me lpc_ich mei prime_numbers
[  155.793424] CPU: 1 PID: 1575 Comm: kworker/1:4 Tainted: G     U         
4.13.0-CI-CI_DRM_3078+ #1
[  155.793427] Hardware name: MSI MS-7924/Z97M-G43(MS-7924), BIOS V1.12
02/15/2016
[  155.793451] Workqueue: events_long i915_hangcheck_elapsed [i915]
[  155.793456] task: ffff88040293a800 task.stack: ffffc90001318000
[  155.793481] RIP: 0010:__unclaimed_reg_debug+0x47/0x60 [i915]
[  155.793483] RSP: 0018:ffffc9000131b9d8 EFLAGS: 00010096
[  155.793488] RAX: 0000000000000024 RBX: 0000000000000000 RCX:
0000000000000002
[  155.793490] RDX: 0000000080000002 RSI: ffffffff81ca0ea3 RDI:
00000000ffffffff
[  155.793492] RBP: ffffc9000131b9f0 R08: 0000000000000000 R09:
0000000000000001
[  155.793495] R10: ffffc9000131b968 R11: 000000008369f3ac R12:
0000000000070008
[  155.793497] R13: 0000000000000001 R14: 0000000000000000 R15:
ffff8803f96d0ba8
[  155.793499] FS:  0000000000000000(0000) GS:ffff88041fa40000(0000)
knlGS:0000000000000000
[  155.793501] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  155.793504] CR2: 00007faae2356000 CR3: 0000000003e0f000 CR4:
00000000001406e0
[  155.793506] Call Trace:
[  155.793532]  gen6_read32+0x22d/0x2b0 [i915]
[  155.793557]  ? fwtable_read8+0x2c0/0x2c0 [i915]
[  155.793586]  intel_modeset_setup_hw_state+0x6c4/0xdc0 [i915]
[  155.793615]  __intel_display_resume+0x1f/0xc0 [i915]
[  155.793642]  intel_finish_reset+0xff/0x170 [i915]
[  155.793661]  i915_reset_device+0x205/0x260 [i915]
[  155.793681]  ? gen8_gt_irq_ack+0x170/0x170 [i915]
[  155.793687]  ? work_on_cpu_safe+0x60/0x60
[  155.793709]  i915_handle_error+0x2d8/0x430 [i915]
[  155.793716]  ? vsnprintf+0xd1/0x4b0
[  155.793721]  ? scnprintf+0x3a/0x70
[  155.793748]  hangcheck_declare_hang+0xd3/0xf0 [i915]
[  155.793769]  ? intel_runtime_pm_put+0x56/0xa0 [i915]
[  155.793796]  i915_hangcheck_elapsed+0x262/0x2d0 [i915]
[  155.793803]  process_one_work+0x224/0x650
[  155.793809]  worker_thread+0x4e/0x3b0
[  155.793815]  kthread+0x114/0x150
[  155.793818]  ? process_one_work+0x650/0x650
[  155.793820]  ? kthread_create_on_node+0x40/0x40
[  155.793825]  ret_from_fork+0x27/0x40
[  155.793833] Code: 01 75 31 84 db 75 2d 45 84 ed 48 c7 c0 e1 2d 2e a0 48 c7
c6 d7 2d 2e a0 48 0f 44 f0 44 89 e2 48 c7 c7 ea 2d 2e a0 e8 ca 99 ec e0 <0f> ff
83 2d 04 fb 0f 00 01 5b 41 5c 41 5d 5d c3 66 0f 1f 84 00 
[  155.793957] ---[ end trace 0063b64b25b2c295 ]---

Full data:
https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3078/shard-hsw3/igt@kms_busy@extended-modeset-hang-oldfb-with-reset-render-B.html

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