[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

Guo Jinxian <jinxianx.guo at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |ASSIGNED

--- Comment #2 from Guo Jinxian <jinxianx.guo at intel.com> ---
(In reply to Daniel Vetter from comment #1)
> Just to double-check: -nightly works well?
> 
> Also I'm pretty sure that SNB module reload once worked, so upgrading to
> regression.

Here has another bug 86507 on -nightly 

[root at x-hnr9 ~]# cd /GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests/
[root at x-hnr9 tests]# ./drv_module_reload
unbinding /sys/class/vtconsole/vtcon0/: (M) frame buffer device
module successfully unloaded
[root at x-hnr9 tests]# dmesg -r|egrep "<[1-4]>"|grep drm
<4>[  150.769139] WARNING: CPU: 0 PID: 4160 at drivers/gpu/drm/drm_mm.c:765
i915_global_gtt_cleanup+0x3a/0x80 [i915]()
<4>[  150.769147] Modules linked in: dm_mod snd_hda_codec_hdmi
snd_hda_codec_idt snd_hda_codec_generic iTCO_wdt iTCO_vendor_support ppdev
joydev pcspkr serio_raw uvcvideo videobuf2_vmalloc videobuf2_memops
firewire_ohci videobuf2_core v4l2_common videodev snd_hda_controller
snd_hda_codec firewire_core snd_hwdep crc_itu_t snd_pcm lpc_ich mfd_core
snd_timer snd soundcore wmi parport_pc parport battery tpm_infineon tpm_tis tpm
ac acpi_cpufreq i915(-) button video drm_kms_helper drm cfbfillrect cfbimgblt
cfbcopyarea [last unloaded: snd_hda_intel]
<4>[  150.769199] CPU: 0 PID: 4160 Comm: rmmod Not tainted
3.18.0-rc6_drm-intel-nightly_ab4b25_20141125+ #1918
<4>[  150.769310]  [<ffffffffa0023959>] ? drm_modeset_unlock_all+0x41/0x50
[drm]
<4>[  150.769320]  [<ffffffffa001308d>] ? drm_dev_unregister+0x1e/0x8b [drm]
<4>[  150.769331]  [<ffffffffa001394f>] ? drm_put_dev+0x3e/0x47 [drm]
<4>[  150.769374]  [<ffffffffa00151a1>] ? drm_pci_exit+0x39/0x9c [drm]
<4>[  150.769478] CPU: 0 PID: 4160 Comm: rmmod Tainted: G    B   W     
3.18.0-rc6_drm-intel-nightly_ab4b25_20141125+ #1918
<4>[  150.769617]  [<ffffffffa0023959>] ? drm_modeset_unlock_all+0x41/0x50
[drm]
<4>[  150.769624]  [<ffffffffa001308d>] ? drm_dev_unregister+0x1e/0x8b [drm]
<4>[  150.769631]  [<ffffffffa001394f>] ? drm_put_dev+0x3e/0x47 [drm]
<4>[  150.769657]  [<ffffffffa00151a1>] ? drm_pci_exit+0x39/0x9c [drm]
<4>[  150.769679] CPU: 0 PID: 4160 Comm: rmmod Tainted: G    B   W     
3.18.0-rc6_drm-intel-nightly_ab4b25_20141125+ #1918
<4>[  150.769720]  [<ffffffffa0023959>] ? drm_modeset_unlock_all+0x41/0x50
[drm]
<4>[  150.769726]  [<ffffffffa001308d>] ? drm_dev_unregister+0x1e/0x8b [drm]
<4>[  150.769733]  [<ffffffffa001394f>] ? drm_put_dev+0x3e/0x47 [drm]
<4>[  150.769770]  [<ffffffffa00151a1>] ? drm_pci_exit+0x39/0x9c [drm]

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