[Bug 105185] [CI] igt at kms_* - dmesg-warn - WARNING: CPU: 4 PID: 1734 at drivers/gpu/drm/drm_vblank.c:614 drm_calc_vbltimestamp_from_scanoutpos+0x13e/0x2f0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105185

--- Comment #30 from Marta Löfstedt <marta.lofstedt at intel.com> ---
Since HSW hits this incomplete on related test I file these on this bug as
well:

https://intel-gfx-ci.01.org/tree/drm-tip/IGT_4315/shard-snb2/igt@kms_chv_cursor_fail@pipe-b-256x256-left-edge.html

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3883/shard-hsw2/igt@kms_chv_cursor_fail@pipe-c-64x64-right-edge.html

<7>[  855.521563] [drm:intel_disable_pipe [i915]] disabling pipe C
<4>[  855.521566] divide error: 0000 [#1] PREEMPT SMP PTI
<0>[  855.521570] Dumping ftrace buffer:
<0>[  855.521575]    (ftrace buffer empty)
<4>[  855.521577] Modules linked in: snd_hda_intel i915 vgem snd_hda_codec_hdmi
x86_pkg_temp_thermal intel_powerclamp coretemp crct10dif_pclmul
snd_hda_codec_realtek crc32_pclmul snd_hda_codec_generic ghash_clmulni_intel
snd_hda_codec r8169 snd_hwdep mei_me mii snd_hda_core mei snd_pcm lpc_ich
prime_numbers [last unloaded: i915]
<4>[  855.521602] CPU: 4 PID: 0 Comm: swapper/4 Tainted: G     U  W       
4.16.0-rc4-CI-CI_DRM_3883+ #1
<4>[  855.521603] Hardware name: MSI MS-7924/Z97M-G43(MS-7924), BIOS V1.12
02/15/2016
<4>[  855.521609] RIP: 0010:drm_calc_vbltimestamp_from_scanoutpos+0x1c9/0x2f0
<4>[  855.521611] RSP: 0018:ffff88041fb03d38 EFLAGS: 00010086
<4>[  855.521614] RAX: ffffffec890d3c00 RBX: 000000c7218c002b RCX:
0000000000000000
<4>[  855.521615] RDX: ffffffffffffffff RSI: ffffffff8210ff39 RDI:
000000c7218c002b
<4>[  855.521616] RBP: ffff88041fb03d98 R08: 0000000000000000 R09:
0000000000000001
<4>[  855.521618] R10: 0000000000000000 R11: 00000000000002cd R12:
0000000000000002
<4>[  855.521619] R13: 0000000000000001 R14: ffff8803fa1daa78 R15:
0000000000000000
<4>[  855.521621] FS:  0000000000000000(0000) GS:ffff88041fb00000(0000)
knlGS:0000000000000000
<4>[  855.521623] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>[  855.521624] CR2: 000055ab64d5be98 CR3: 0000000005210002 CR4:
00000000001606e0
<4>[  855.521625] Call Trace:
<4>[  855.521628]  <IRQ>
<4>[  855.521634]  drm_get_last_vbltimestamp+0x36/0x50
<4>[  855.521637]  drm_update_vblank_count+0x64/0x240
<4>[  855.521642]  drm_crtc_accurate_vblank_count+0x41/0x90
<4>[  855.521708]  display_pipe_crc_irq_handler+0x176/0x220 [i915]
<4>[  855.521762]  hsw_pipe_crc_irq_handler+0x46/0x50 [i915]
<4>[  855.521812]  ironlake_irq_handler+0x8ac/0xa30 [i915]
<4>[  855.521820]  __handle_irq_event_percpu+0x3c/0x340
<4>[  855.521825]  handle_irq_event_percpu+0x1b/0x50
<4>[  855.521828]  handle_irq_event+0x2f/0x50
<4>[  855.521832]  handle_edge_irq+0xe4/0x1b0
<4>[  855.521838]  handle_irq+0x11/0x20
<4>[  855.521842]  do_IRQ+0x5e/0x120
<4>[  855.521849]  common_interrupt+0xf/0xf
<4>[  855.521850]  </IRQ>
<4>[  855.521855] RIP: 0010:cpuidle_enter_state+0xaa/0x350
<4>[  855.521856] RSP: 0018:ffffc900000afeb8 EFLAGS: 00000206 ORIG_RAX:
ffffffffffffffdd
<4>[  855.521859] RAX: ffff88040d5a0040 RBX: 0000000000020487 RCX:
0000000000000001
<4>[  855.521861] RDX: 0000000000000000 RSI: ffffffff8210ff39 RDI:
ffffffff820c05bf
<4>[  855.521862] RBP: 0000000000000005 R08: 0000000000004034 R09:
0000000000000008
<4>[  855.521863] R10: 0000000000000000 R11: 0000000000000000 R12:
0000000000000005
<4>[  855.521865] R13: ffffe8ffffd09090 R14: 000000c7310a8fa7 R15:
ffffffff822944a0
<4>[  855.521873]  ? cpuidle_enter_state+0xa6/0x350
<4>[  855.521878]  do_idle+0x188/0x1d0
<4>[  855.521882]  cpu_startup_entry+0x14/0x20
<4>[  855.521887]  start_secondary+0x129/0x160
<4>[  855.521892]  secondary_startup_64+0xa5/0xb0
<4>[  855.521898] Code: ac 48 8b 45 b0 48 89 fb 44 89 18 41 8b 86 a8 00 00 00
0f af 45 b8 49 63 8e 90 00 00 00 03 45 bc 48 98 48 69 c0 40 42 0f 00 48 99 <48>
f7 f9 48 98 48 29 c3 48 89 d8 48 8b 5d a0 48 89 03 f6 05 ce 
<1>[  855.521951] RIP: drm_calc_vbltimestamp_from_scanoutpos+0x1c9/0x2f0 RSP:
ffff88041fb03d38
<4>[  855.521954] ---[ end trace 361123ac88e02638 ]---

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