[  328.266473] Console: switching to colour dummy device 80x25
[  328.266870] [IGT] kms_flip: executing
[  328.329665] [IGT] kms_flip: starting subtest bo-too-big-interruptible
[  330.845251] ------------[ cut here ]------------
[  330.845318] WARNING: CPU: 1 PID: 1498 at drivers/gpu/drm/i915/intel_panel.c:771 vlv_disable_backlight+0x8f/0xa0 [i915]
[  330.845323] WARN_ON(pipe != PIPE_A && pipe != PIPE_B)
[  330.845327] Modules linked in: intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul ghash_clmulni_intel lpc_ich snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core i2c_designware_platform i2c_designware_core snd_pcm r8169 mii i915 prime_numbers sdhci_acpi i2c_hid sdhci mmc_core
[  330.845419] CPU: 1 PID: 1498 Comm: kms_flip Tainted: G        W       4.11.0-rc8-drm-tip-ww18-commit-aea271f+ #1
[  330.845422] Hardware name: TOSHIBA Satellite C55t-A/Portable PC, BIOS 1.30 03/24/2014
[  330.845426] Call Trace:
[  330.845436]  dump_stack+0x67/0x92
[  330.845444]  __warn+0xc6/0xe0
[  330.845451]  warn_slowpath_fmt+0x46/0x50
[  330.845459]  ? schedule_timeout_uninterruptible+0x25/0x30
[  330.845512]  vlv_disable_backlight+0x8f/0xa0 [i915]
[  330.845559]  intel_panel_disable_backlight+0x53/0x80 [i915]
[  330.845605]  intel_edp_backlight_off.part.23+0x34/0x40 [i915]
[  330.845652]  intel_disable_dp+0xd2/0x110 [i915]
[  330.845699]  intel_encoders_disable.isra.67+0x7f/0x90 [i915]
[  330.845748]  i9xx_crtc_disable+0x52/0x3c0 [i915]
[  330.845795]  ? intel_crtc_disable_planes+0xc3/0xe0 [i915]
[  330.845843]  intel_atomic_commit_tail+0x12c/0x1020 [i915]
[  330.845850]  ? __lock_is_held+0x76/0xc0
[  330.845904]  intel_atomic_commit+0x411/0x520 [i915]
[  330.845912]  ? drm_atomic_check_only+0x430/0x5b0
[  330.845918]  ? drm_atomic_set_crtc_for_connector+0xed/0x100
[  330.845924]  drm_atomic_commit+0x46/0x50
[  330.845931]  drm_atomic_helper_set_config+0x79/0x90
[  330.845938]  __drm_mode_set_config_internal+0x60/0x110
[  330.845944]  drm_mode_setcrtc+0x3e9/0x5f0
[  330.845962]  drm_ioctl+0x1f4/0x480
[  330.845967]  ? drm_mode_getcrtc+0x180/0x180
[  330.845979]  ? __vfs_write+0x23/0x120
[  330.845987]  do_vfs_ioctl+0x90/0x6e0
[  330.845994]  ? vfs_write+0x1ab/0x1f0
[  330.845999]  ? trace_hardirqs_on_caller+0x122/0x1b0
[  330.846006]  SyS_ioctl+0x3c/0x70
[  330.846013]  entry_SYSCALL_64_fastpath+0x1c/0xb1
[  330.846018] RIP: 0033:0x7f3289b918b7
[  330.846022] RSP: 002b:00007ffdbb651ff8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  330.846029] RAX: ffffffffffffffda RBX: 0000000000408000 RCX: 00007f3289b918b7
[  330.846032] RDX: 00007ffdbb652030 RSI: 00000000c06864a2 RDI: 0000000000000003
[  330.846036] RBP: 00007f3285f4c000 R08: 0000000000000000 R09: 0000000000000000
[  330.846039] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000019b26c8
[  330.846043] R13: 00000000019b2b80 R14: 00007ffdbb652568 R15: 00007ffdbb65236c
[  330.848944] ---[ end trace 86e33bfce7cc2728 ]---
[  331.853856] [IGT] kms_flip: exiting, ret=99
[  331.901216] Console: switching to colour frame buffer device 170x48