Comment # 20 on bug 1009674 from Matwey Kornilov

(In reply to Takashi Iwai from comment #18)
> OK, now I tried to backport the upstream commit 8581f1b5ee08.
> 
> The test kernel is being built in OBS home:tiwai:bnc1009674 repo.  It takes
> some time (1 or 2 hours, usually) until the package is built and published. 
> Please give it a try later.  Once when it's confirmed to work, I'll merge
> the patch to SLE12-SP2 / openSUSE-42.2 branch.

Hi, 

I am trying 4.4.39-1.g4efe6d3 from the repo you said and the issue is still
there:

[   21.014511] ------------[ cut here ]------------
[   21.014662] WARNING: CPU: 0 PID: 123 at
../drivers/gpu/drm/i915/intel_runtime_pm.c:1464
intel_display_power_put+0x13a/0x170 [i915]()
[   21.014685] WARN_ON(!power_domains->domain_use_count[domain])
[   21.014844] Modules linked in: iscsi_ibft iscsi_boot_sysfs sd_mod
hid_generic joydev hid_penmount usbhid snd_hda_codec_hdmi intel_rapl
intel_soc_dts_iosf intel_powerclamp coretemp kvm_intel kvm irqbypass
crct10dif_pclmul snd_hda_codec_realtek iTCO_wdt snd_hda_codec_generic
crc32_pclmul iTCO_vendor_support crc32c_intel jitterentropy_rng drbg xhci_pci
snd_hda_intel ahci ansi_cprng libahci igb ptp snd_hda_codec xhci_hcd pps_core
lpc_ich i2c_i801 mfd_core snd_hda_core snd_hwdep dca usbcore usb_common shpchp
aesni_intel libata aes_x86_64 lrw gf128mul i915 glue_helper ablk_helper cryptd
drm_kms_helper drm mei_txe fb_sys_fops syscopyarea sysfillrect mei sysimgblt
i2c_algo_bit serio_raw pcspkr snd_intel_sst_acpi thermal fan snd_intel_sst_core
rfkill_gpio video snd_soc_rt5640 snd_soc_sst_mfld_platform fjes snd_soc_rl6231
snd_soc_sst_match snd_soc_core i2c_hid snd_compress snd_pcm regmap_i2c rfkill
intel_smartconnect 8250_dw sdhci_acpi sdhci snd_timer snd
i2c_designware_platform soundcore i2c_designware_core pwm_lpss_platform
mmc_core pwm_lpss button processor sg scsi_mod autofs4
[   21.014911] CPU: 0 PID: 123 Comm: kworker/0:2 Tainted: G        W       
4.4.39-1.g4efe6d3-default #1
[   21.014915] Hardware name: Lex BayTrail       3I380CW A2         /Type2 -
Board Product Name, BIOS 3I380CW A3 09/29/2014
[   21.015071] Workqueue: events edp_panel_vdd_work [i915]
[   21.015085]  0000000000000000 ffffffff81327cb7 ffff88007fb7bda8
ffffffffa04d45a0
[   21.015096]  ffffffff8107e8f1 ffff88007e67006c ffff88007fb7bdf8
ffff88007e670000
[   21.015106]  ffff88007e679598 0000000000000000 ffffffff8107e96c
ffffffffa04e5fbf
[   21.015108] Call Trace:
[   21.015158]  [<ffffffff81019ea9>] dump_trace+0x59/0x320
[   21.015179]  [<ffffffff8101a26a>] show_stack_log_lvl+0xfa/0x180
[   21.015197]  [<ffffffff8101b011>] show_stack+0x21/0x40
[   21.015216]  [<ffffffff81327cb7>] dump_stack+0x5c/0x85
[   21.015235]  [<ffffffff8107e8f1>] warn_slowpath_common+0x81/0xb0
[   21.015253]  [<ffffffff8107e96c>] warn_slowpath_fmt+0x4c/0x50
[   21.015391]  [<ffffffffa041e02a>] intel_display_power_put+0x13a/0x170 [i915]
[   21.015428]  [<ffffffff81097295>] process_one_work+0x155/0x440
[   21.015448]  [<ffffffff81097dd6>] worker_thread+0x116/0x4b0
[   21.015468]  [<ffffffff8109d3b8>] kthread+0xc8/0xe0
[   21.015489]  [<ffffffff8160adcf>] ret_from_fork+0x3f/0x70
[   21.029522] DWARF2 unwinder stuck at ret_from_fork+0x3f/0x70
[   21.029524] 
[   21.029527] Leftover inexact backtrace:
[   21.029527] 
[   21.029545]  [<ffffffff8109d2f0>] ? kthread_park+0x50/0x50
[   21.029617] ---[ end trace e9debfaf805ad33d ]---