[Bug 77511] [ILK/SNB/IVB/BYT/HSW/BDW regression]igt/drv_module_reload cause WARNING at drivers/gpu/drm/drm_crtc.c:4684 drm_mode_config_cleanup

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=77511

--- Comment #9 from Guo Jinxian <jinxianx.guo at intel.com> ---
The failure is able to reproduce on latest
-fixes(8c875fca1a8d76665c60fa141c220cee65f44f5e)

[root at x-ivb6 tests]# ./drv_module_reload
unbinding /sys/class/vtconsole/vtcon0/: (M) frame buffer device
module successfully unloaded
[root at x-ivb6 tests]# echo $?
0
[root at x-ivb6 tests]# dmesg -r|egrep "<[1-4]>"|grep drm
<4>[ 3353.640262] 3.17.0-rc5_drm-intel-fixes_8c875f_20140922_debug+ #2706 Not
tainted
<4>[ 3353.640314]        [<ffffffffa0013a8f>] drm_dev_register+0x84/0xfd [drm]
<4>[ 3353.640320]        [<ffffffffa00162b1>] drm_get_pci_dev+0xfc/0x1b3 [drm]
<4>[ 3353.640343]        [<ffffffffa00163cd>] drm_pci_init+0x65/0xe8 [drm]
<4>[ 3353.640381] CPU: 0 PID: 4395 Comm: drv_module_relo Not tainted
3.17.0-rc5_drm-intel-fixes_8c875f_20140922_debug+ #2706
<4>[ 3353.689963] WARNING: CPU: 3 PID: 4433 at drivers/gpu/drm/drm_crtc.c:5113
drm_mode_config_cleanup+0x152/0x22b [drm]()
<4>[ 3353.689967] Modules linked in: dm_mod iTCO_wdt iTCO_vendor_support ppdev
snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic pcspkr
snd_hda_controller snd_hda_codec snd_hwdep snd_pcm i2c_i801 lpc_ich mfd_core
snd_timer snd soundcore battery parport_pc parport wmi acpi_cpufreq i915(-)
button video drm_kms_helper drm cfbfillrect cfbimgblt cfbcopyarea [last
unloaded: snd_hda_intel]
<4>[ 3353.689993] CPU: 3 PID: 4433 Comm: rmmod Not tainted
3.17.0-rc5_drm-intel-fixes_8c875f_20140922_debug+ #2706
<4>[ 3353.690030]  [<ffffffffa001b677>] ? drm_mode_config_cleanup+0x152/0x22b
[drm]
<4>[ 3353.690042]  [<ffffffffa001b677>] drm_mode_config_cleanup+0x152/0x22b
[drm]
<4>[ 3353.690086]  [<ffffffffa00138a8>] drm_dev_unregister+0x29/0x9a [drm]
<4>[ 3353.690094]  [<ffffffffa001427c>] drm_put_dev+0x51/0x5d [drm]
<4>[ 3353.690168]  [<ffffffffa0015b16>] drm_pci_exit+0x46/0x8e [drm]
<4>[ 3353.691860] WARNING: CPU: 3 PID: 4433 at
drivers/gpu/drm/i915/i915_dma.c:1905 i915_driver_unload+0x1b0/0x289 [i915]()
<4>[ 3353.691864] Modules linked in: dm_mod iTCO_wdt iTCO_vendor_support ppdev
snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic pcspkr
snd_hda_controller snd_hda_codec snd_hwdep snd_pcm i2c_i801 lpc_ich mfd_core
snd_timer snd soundcore battery parport_pc parport wmi acpi_cpufreq i915(-)
button video drm_kms_helper drm cfbfillrect cfbimgblt cfbcopyarea [last
unloaded: snd_hda_intel]
<4>[ 3353.691889] CPU: 3 PID: 4433 Comm: rmmod Tainted: G        W     
3.17.0-rc5_drm-intel-fixes_8c875f_20140922_debug+ #2706
<4>[ 3353.691958]  [<ffffffffa00138a8>] drm_dev_unregister+0x29/0x9a [drm]
<4>[ 3353.691966]  [<ffffffffa001427c>] drm_put_dev+0x51/0x5d [drm]
<4>[ 3353.692037]  [<ffffffffa0015b16>] drm_pci_exit+0x46/0x8e [drm]
<4>[ 3353.692087] WARNING: CPU: 3 PID: 4433 at
drivers/gpu/drm/i915/i915_dma.c:1913 i915_driver_unload+0x1f4/0x289 [i915]()
<4>[ 3353.692090] Modules linked in: dm_mod iTCO_wdt iTCO_vendor_support ppdev
snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic pcspkr
snd_hda_controller snd_hda_codec snd_hwdep snd_pcm i2c_i801 lpc_ich mfd_core
snd_timer snd soundcore battery parport_pc parport wmi acpi_cpufreq i915(-)
button video drm_kms_helper drm cfbfillrect cfbimgblt cfbcopyarea [last
unloaded: snd_hda_intel]
<4>[ 3353.692114] CPU: 3 PID: 4433 Comm: rmmod Tainted: G        W     
3.17.0-rc5_drm-intel-fixes_8c875f_20140922_debug+ #2706
<4>[ 3353.692179]  [<ffffffffa00138a8>] drm_dev_unregister+0x29/0x9a [drm]
<4>[ 3353.692187]  [<ffffffffa001427c>] drm_put_dev+0x51/0x5d [drm]
<4>[ 3353.692256]  [<ffffffffa0015b16>] drm_pci_exit+0x46/0x8e [drm]

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