[Bug 109387] New: [CI][BAT] igt at i915_selftest@live_contexts - dmesg-warn - Unclaimed read from register 0x2074

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109387

            Bug ID: 109387
           Summary: [CI][BAT] igt at i915_selftest@live_contexts - dmesg-warn
                    - Unclaimed read from register 0x2074
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: martin.peres at free.fr
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_5449/fi-byt-squawks/igt@i915_selftest@live_contexts.html

<4> [472.283986] ------------[ cut here ]------------
<4> [472.284062] Unclaimed read from register 0x2074
<4> [472.284216] WARNING: CPU: 0 PID: 153 at
drivers/gpu/drm/i915/intel_uncore.c:1093 __unclaimed_reg_debug+0x40/0x50 [i915]
<4> [472.284221] Modules linked in: i915(+) amdgpu chash gpu_sched ttm vgem
snd_hda_codec_hdmi btusb coretemp btrtl btbcm crct10dif_pclmul btintel
crc32_pclmul ghash_clmulni_intel bluetooth cdc_ether usbnet r8152 ecdh_generic
mii snd_hda_codec snd_hwdep snd_hda_core snd_pcm prime_numbers lpc_ich [last
unloaded: i915]
<4> [472.284261] CPU: 0 PID: 153 Comm: kworker/0:2 Tainted: G     U           
5.0.0-rc2-CI-CI_DRM_5449+ #1
<4> [472.284266] Hardware name: GOOGLE Squawks/Squawks, BIOS MrChromebox
02/04/2018
<4> [472.284365] Workqueue: events_long i915_hangcheck_elapsed [i915]
<4> [472.284465] RIP: 0010:__unclaimed_reg_debug+0x40/0x50 [i915]
<4> [472.284472] Code: 74 05 5b 5d 41 5c c3 45 84 e4 48 c7 c0 b6 38 75 a0 48 c7
c6 ac 38 75 a0 48 0f 44 f0 89 ea 48 c7 c7 bf 38 75 a0 e8 a0 f9 a3 e0 <0f> 0b 83
2d 27 2c 1a 00 01 5b 5d 41 5c c3 66 90 41 56 41 55 41 89
<4> [472.284477] RSP: 0018:ffffc900009dfd00 EFLAGS: 00010086
<4> [472.284483] RAX: 0000000000000000 RBX: 0000000000000000 RCX:
0000000000000000
<4> [472.284488] RDX: 0000000000000007 RSI: ffffffff820cb6f9 RDI:
00000000ffffffff
<4> [472.284492] RBP: 0000000000002074 R08: 0000000000000000 R09:
0000000000000001
<4> [472.284497] R10: ffffc900009dfcc8 R11: 0000000000000000 R12:
0000000000000001
<4> [472.284502] R13: 0000000000000001 R14: 00000000044089a8 R15:
0000000000000202
<4> [472.284507] FS:  0000000000000000(0000) GS:ffff888077800000(0000)
knlGS:0000000000000000
<4> [472.284512] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4> [472.284517] CR2: 00007fd937ea55a0 CR3: 0000000072e54000 CR4:
00000000001006f0
<4> [472.284522] Call Trace:
<4> [472.284627]  fwtable_read32+0x1e8/0x250 [i915]
<4> [472.284730]  intel_engine_get_active_head+0xbe/0xd0 [i915]
<4> [472.284833]  i915_hangcheck_elapsed+0x17a/0x4d0 [i915]
<4> [472.284853]  ? lock_acquire+0xa6/0x1c0
<4> [472.284872]  process_one_work+0x245/0x610
<4> [472.284890]  worker_thread+0x37/0x380
<4> [472.284901]  ? process_one_work+0x610/0x610
<4> [472.284907]  kthread+0x119/0x130
<4> [472.284914]  ? kthread_park+0x80/0x80
<4> [472.284926]  ret_from_fork+0x3a/0x50
<4> [472.284949] irq event stamp: 2360500
<4> [472.284956] hardirqs last  enabled at (2360499): [<ffffffff8197cb74>]
_raw_spin_unlock_irq+0x24/0x50
<4> [472.284962] hardirqs last disabled at (2360500): [<ffffffff8197c9ad>]
_raw_spin_lock_irqsave+0xd/0x50
<4> [472.284968] softirqs last  enabled at (2360350): [<ffffffff81c0033a>]
__do_softirq+0x33a/0x4b9
<4> [472.284976] softirqs last disabled at (2360343): [<ffffffff810b5081>]
irq_exit+0xd1/0xe0
<4> [472.285074] WARNING: CPU: 0 PID: 153 at
drivers/gpu/drm/i915/intel_uncore.c:1093 __unclaimed_reg_debug+0x40/0x50 [i915]
<4> [472.285079] ---[ end trace 1cd981e094570460 ]---

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