[Bug 86685] [SNB regression]igt/drv_module_reload causes "WARNING: CPU: 0 PID: 4163 at drivers/gpu/drm/i915/i915_irq.c:154 ironlake_disable_vblank+0x40/0x52 [i915]()"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86685

--- Comment #4 from Guo Jinxian <jinxianx.guo at intel.com> ---
Another dmesg warning occurs on IVB, I am not sure if is the failure relate to
this bug.


[root at x-ivb6 tests]# ./drv_module_reload
unbinding /sys/class/vtconsole/vtcon0/: (M) frame buffer device
module successfully unloaded
module successfully loaded again
[root at x-ivb6 tests]# dmesg -r|egrep "<[1-4]>"|grep drm
<4>[  155.833797] 3.18.0-rc6_drm-intel-fixes_afa4e5_20141128_debug+ #2040 Not
tainted
<4>[  155.833848]        [<ffffffffa0013aa7>] drm_dev_register+0x84/0xfd [drm]
<4>[  155.833855]        [<ffffffffa0016404>] drm_get_pci_dev+0xff/0x1b6 [drm]
<4>[  155.833879]        [<ffffffffa0016513>] drm_pci_init+0x58/0xd9 [drm]
<4>[  155.833917] CPU: 2 PID: 4078 Comm: drv_module_relo Not tainted
3.18.0-rc6_drm-intel-fixes_afa4e5_20141128_debug+ #2040
<4>[  155.901341] WARNING: CPU: 1 PID: 4115 at
drivers/gpu/drm/i915/i915_irq.c:154 ironlake_disable_display_irq+0x36/0x77
[i915]()
<4>[  155.901345] Modules linked in: ip6table_filter ip6_tables ipv6
iptable_filter ip_tables ebtable_nat ebtables x_tables iTCO_wdt
iTCO_vendor_support ppdev snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_codec_generic dm_mod pcspkr i2c_i801 snd_hda_controller snd_hda_codec
snd_hwdep snd_pcm snd_timer snd lpc_ich mfd_core soundcore battery parport_pc
parport wmi acpi_cpufreq i915(-) button video drm_kms_helper drm cfbfillrect
cfbimgblt cfbcopyarea [last unloaded: snd_hda_intel]
<4>[  155.901378] CPU: 1 PID: 4115 Comm: rmmod Not tainted
3.18.0-rc6_drm-intel-fixes_afa4e5_20141128_debug+ #2040
<4>[  155.901415]  [<ffffffffa001114a>] ? get_drm_timestamp+0x1b/0x2e [drm]
<4>[  155.901462]  [<ffffffffa0011535>] vblank_disable_and_save+0x7b/0x188
[drm]
<4>[  155.901469]  [<ffffffffa00128a3>] drm_vblank_cleanup+0x4f/0x85 [drm]
<4>[  155.901495]  [<ffffffffa00138c0>] drm_dev_unregister+0x29/0x9a [drm]
<4>[  155.901503]  [<ffffffffa0014255>] drm_put_dev+0x51/0x5d [drm]
<4>[  155.901579]  [<ffffffffa0015cb2>] drm_pci_exit+0x46/0x8e [drm]
<4>[  155.901628] WARNING: CPU: 1 PID: 4115 at
drivers/gpu/drm/i915/i915_irq.c:154 ironlake_disable_display_irq+0x36/0x77
[i915]()
<4>[  155.901631] Modules linked in: ip6table_filter ip6_tables ipv6
iptable_filter ip_tables ebtable_nat ebtables x_tables iTCO_wdt
iTCO_vendor_support ppdev snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_codec_generic dm_mod pcspkr i2c_i801 snd_hda_controller snd_hda_codec
snd_hwdep snd_pcm snd_timer snd lpc_ich mfd_core soundcore battery parport_pc
parport wmi acpi_cpufreq i915(-) button video drm_kms_helper drm cfbfillrect
cfbimgblt cfbcopyarea [last unloaded: snd_hda_intel]
<4>[  155.901662] CPU: 1 PID: 4115 Comm: rmmod Tainted: G        W     
3.18.0-rc6_drm-intel-fixes_afa4e5_20141128_debug+ #2040
<4>[  155.901694]  [<ffffffffa001114a>] ? get_drm_timestamp+0x1b/0x2e [drm]
<4>[  155.901737]  [<ffffffffa0011535>] vblank_disable_and_save+0x7b/0x188
[drm]
<4>[  155.901744]  [<ffffffffa00128a3>] drm_vblank_cleanup+0x4f/0x85 [drm]
<4>[  155.901768]  [<ffffffffa00138c0>] drm_dev_unregister+0x29/0x9a [drm]
<4>[  155.901775]  [<ffffffffa0014255>] drm_put_dev+0x51/0x5d [drm]
<4>[  155.901849]  [<ffffffffa0015cb2>] drm_pci_exit+0x46/0x8e [drm]
<4>[  155.901894] WARNING: CPU: 1 PID: 4115 at
drivers/gpu/drm/i915/i915_irq.c:154 ironlake_disable_display_irq+0x36/0x77
[i915]()
<4>[  155.901898] Modules linked in: ip6table_filter ip6_tables ipv6
iptable_filter ip_tables ebtable_nat ebtables x_tables iTCO_wdt
iTCO_vendor_support ppdev snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_codec_generic dm_mod pcspkr i2c_i801 snd_hda_controller snd_hda_codec
snd_hwdep snd_pcm snd_timer snd lpc_ich mfd_core soundcore battery parport_pc
parport wmi acpi_cpufreq i915(-) button video drm_kms_helper drm cfbfillrect
cfbimgblt cfbcopyarea [last unloaded: snd_hda_intel]
<4>[  155.901927] CPU: 1 PID: 4115 Comm: rmmod Tainted: G        W     
3.18.0-rc6_drm-intel-fixes_afa4e5_20141128_debug+ #2040
<4>[  155.901958]  [<ffffffffa001114a>] ? get_drm_timestamp+0x1b/0x2e [drm]
<4>[  155.902000]  [<ffffffffa0011535>] vblank_disable_and_save+0x7b/0x188
[drm]
<4>[  155.902007]  [<ffffffffa00128a3>] drm_vblank_cleanup+0x4f/0x85 [drm]
<4>[  155.902031]  [<ffffffffa00138c0>] drm_dev_unregister+0x29/0x9a [drm]
<4>[  155.902038]  [<ffffffffa0014255>] drm_put_dev+0x51/0x5d [drm]
<4>[  155.902110]  [<ffffffffa0015cb2>] drm_pci_exit+0x46/0x8e [drm]

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