[Bug 80203] [HSW] trying to runtime suspend with power well enabled on 3.15

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80203

--- Comment #15 from Patrik Lundquist <patrik.lundquist at gmail.com> ---
Created attachment 108204
  --> https://bugs.freedesktop.org/attachment.cgi?id=108204&action=edit
Linux 3.18-rc1 dmesg with drm.debug=0xe i915.mmio_debug=1

I never experienced the problems after backporting Ville's mutex patch to Linux
3.17 and 3.18-rc1 seems to also include the locking patch but I eventually got
this dump, among others, anyway:

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WARNING: CPU: 0 PID: 4819 at
/home/apw/COD/linux/drivers/gpu/drm/i915/intel_pm.c:6590
intel_display_power_put+0x132/0x160 [i915]()
Modules linked in: ctr ccm arc4 iwlmvm mac80211 iwlwifi intel_rapl
x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm joydev cfg80211
rtc_efi serio_raw snd_hda_codec_realtek snd_hda_codec_hdmi
snd_hda_codec_generic thinkpad_acpi nvram snd_hda_intel lpc_ich
snd_hda_controller snd_hda_codec snd_hwdep snd_pcm mac_hid rtsx_pci_ms
intel_smartconnect snd_seq_midi memstick snd_seq_midi_event btusb rfcomm shpchp
bnep bluetooth snd_rawmidi snd_seq snd_seq_device snd_timer snd soundcore
binfmt_misc parport_pc ppdev nls_iso8859_1 lp parport sch_fq dm_crypt
rtsx_pci_sdmmc crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel
aes_x86_64 lrw gf128mul glue_helper ablk_helper i915 cryptd psmouse e1000e ahci
i2c_algo_bit libahci ptp drm_kms_helper rtsx_pci pps_core drm wmi video [last
unloaded: ipmi_msghandler]
CPU: 0 PID: 4819 Comm: kworker/0:3 Tainted: G        W     
3.18.0-031800rc1-generic #201410192135
Hardware name: LENOVO 20AM009DMS/20AM009DMS, BIOS GIET76WW (2.26 ) 08/27/2014
Workqueue: events edp_panel_vdd_work [i915]
 00000000000019be ffff880231aa7d08 ffffffff827a1613 ffffffff82c54168
 0000000000000000 ffff880231aa7d48 ffffffff82074cfc ffff88022dd70000
 000000000000000b 0000000000000017 ffff88022dd70000 0000000000000000
Call Trace:
 [<ffffffff827a1613>] dump_stack+0x46/0x58
 [<ffffffff82074cfc>] warn_slowpath_common+0x8c/0xc0
 [<ffffffff82074d4a>] warn_slowpath_null+0x1a/0x20
 [<ffffffffc016ad52>] intel_display_power_put+0x132/0x160 [i915]
 [<ffffffffc01dac86>] pps_unlock+0x46/0x50 [i915]
 [<ffffffffc01dd012>] edp_panel_vdd_work+0x42/0x50 [i915]
 [<ffffffff8208d6be>] process_one_work+0x14e/0x460
 [<ffffffff8208e03b>] worker_thread+0x11b/0x3f0
 [<ffffffff8208df20>] ? create_worker+0x1e0/0x1e0
 [<ffffffff82093bb9>] kthread+0xc9/0xe0
 [<ffffffff82093af0>] ? flush_kthread_worker+0x90/0x90
 [<ffffffff827aeebc>] ret_from_fork+0x7c/0xb0
 [<ffffffff82093af0>] ? flush_kthread_worker+0x90/0x90
---[ end trace c7d449c4daccb3b6 ]---
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