[Bug 81202] [BSW]CallTrace "WARNING: CPU: 0 PID: 1237 at drivers/gpu/drm/i915/intel_pm.c:5955 check_power_well_state+0x69/0x6f [i915]()" after boot

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81202

--- Comment #1 from Guo Jinxian <jinxianx.guo at intel.com> ---
CallTrace after run test igt/drv_hangman/error-state-basic

Dmesg:
[ 2608.812343] WARNING: CPU: 2 PID: 4421 at
drivers/gpu/drm/i915/intel_pm.c:6175 vlv_power_well_enabled+0x68/0x91 [i915]()
[ 2608.817605] Modules linked in: ip6table_filter ip6_tables iptable_filter
ip_tables ebtable_nat ebtables x_tables ipv6 dm_mod snd_hda_codec_hdmi
snd_hda_codec_realtek snd_hda_codec_generic pcspkr serio_raw snd_hda_intel
snd_hda_controller snd_hda_codec snd_hwdep r8169 snd_pcm snd_timer snd
soundcore battery ac option usb_wwan usbserial i915 button video drm_kms_helper
drm
[ 2608.829112] CPU: 2 PID: 4421 Comm: drv_hangman Tainted: G        W    
3.16.0-rc5_drm-intel-nightly_2a38e1_20140715+ #518
[ 2608.834979]  0000000000000000 0000000000000009 ffffffff8178053d
0000000000000000
[ 2608.840881]  ffffffff8103986c 0000000000000002 ffffffffa00729bb
0000000000000004
[ 2608.846828]  00000000000000c0 0000000000000000 ffff880002ef0000
ffff880002ef8350
[ 2608.852780] Call Trace:
[ 2608.858688]  [<ffffffff8178053d>] ? dump_stack+0x41/0x51
[ 2608.864630]  [<ffffffff8103986c>] ? warn_slowpath_common+0x78/0x90
[ 2608.870609]  [<ffffffffa00729bb>] ? vlv_power_well_enabled+0x68/0x91 [i915]
[ 2608.876618]  [<ffffffffa00729bb>] ? vlv_power_well_enabled+0x68/0x91 [i915]
[ 2608.882580]  [<ffffffffa0073a1d>] ? check_power_well_state+0xf/0x6f [i915]
[ 2608.888506]  [<ffffffff81784c46>] ? mutex_lock+0x9/0x25
[ 2608.894429]  [<ffffffffa0077fed>] ? intel_display_power_get+0x85/0xbd [i915]
[ 2608.900384]  [<ffffffffa00b3fbb>] ?
modeset_update_crtc_power_domains+0x89/0x110 [i915]
[ 2608.906402]  [<ffffffffa00b5892>] ? __intel_set_mode+0xfcd/0x127b [i915]
[ 2608.912394]  [<ffffffff8177d51c>] ? printk+0x4f/0x54
[ 2608.918397]  [<ffffffffa00bba84>] ? intel_set_mode+0xd/0x27 [i915]
[ 2608.924421]  [<ffffffffa00bc661>] ? intel_crtc_set_config+0x705/0xa5b [i915]
[ 2608.930482]  [<ffffffffa008ec31>] ? i915_gem_free_object+0x304/0x32f [i915]
[ 2608.936555]  [<ffffffffa000bf1d>] ? drm_mode_set_config_internal+0x4b/0xb3
[drm]
[ 2608.942650]  [<ffffffffa0050a6a>] ? restore_fbdev_mode+0x8f/0xa8
[drm_kms_helper]
[ 2608.948776]  [<ffffffffa0050aa0>] ?
drm_fb_helper_restore_fbdev_mode_unlocked+0x1d/0x34 [drm_kms_helper]
[ 2608.955006]  [<ffffffffa00c6047>] ? intel_fbdev_restore_mode+0x17/0x40
[i915]
[ 2608.961238]  [<ffffffffa0003816>] ? drm_lastclose+0x3a/0x14f [drm]
[ 2608.967458]  [<ffffffffa0003df3>] ? drm_release+0x4c8/0x501 [drm]
[ 2608.973653]  [<ffffffff8110cbe2>] ? __fput+0xdb/0x1a8
[ 2608.979788]  [<ffffffff810504ac>] ? task_work_run+0x73/0x87
[ 2608.985934]  [<ffffffff810025d4>] ? do_notify_resume+0x5b/0x6c
[ 2608.991980]  [<ffffffff8178635a>] ? int_signal+0x12/0x17

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