[Bug 83486] New: [BSW]igt/drv_module_reload fails and causes "[drm:i915_stolen_to_physical] *ERROR* conflict detected with stolen region: [0x7cf00000 - 0x7ef00000]"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83486

          Priority: medium
            Bug ID: 83486
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BSW]igt/drv_module_reload fails and causes
                    "[drm:i915_stolen_to_physical] *ERROR* conflict
                    detected with stolen region: [0x7cf00000 -
                    0x7ef00000]"
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: jinxianx.guo at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 105728
  --> https://bugs.freedesktop.org/attachment.cgi?id=105728&action=edit
dmesg

==System Environment==
--------------------------
Regression: No.
This bug always exist

Non-working platforms: BSW

==kernel==
--------------------------
origin/drm-intel-nightly: 4144c90b76dfe6eaa2205ac947090786b5091cff(fails)
    drm-intel-nightly: 2014y-09m-03d-15h-44m-26s integration manifest
origin/drm-intel-next-queued: 8fe8a3feeb5aedd17f7b09e51b60b38a6ba7005f(fails)
    drm/i915: init sprites with univeral plane init function
origin/drm-intel-fixes: 77520c8fccc1a599ff7a7b786dacdfdad38b96e4(fails)
    drm/i915: Prevent recursive deadlock on releasing a busy userptr

==Bug detailed description==
-----------------------------
igt/drv_module_reload fails and causes "[drm:i915_stolen_to_physical] *ERROR*
conflict detected with stolen region: [0x7cf00000 - 0x7ef00000]"

Output:
[root at x-bsw01 tests]# ./drv_module_reload
unbinding /sys/class/vtconsole/vtcon1/: (M) frame buffer device
./drv_module_reload: line 27:  3860 Killed                  rmmod i915
WARNING: i915.ko still loaded!
[root at x-bsw01 tests]# echo $?
1
[root at x-bsw01 tests]# dmesg -r|egrep ""<[1-4]>""|grep drm
<3>[    2.212221] [drm:i915_stolen_to_physical] *ERROR* conflict detected with
stolen region: [0x7cf00000 - 0x7ef00000]
<4>[  189.533537] 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 serio_raw pcspkr snd_hda_controller
snd_hda_codec snd_hwdep i2c_i801 snd_pcm snd_timer r8169 snd soundcore battery
ac option usb_wwan usbserial i915(-) button video drm_kms_helper drm
cfbfillrect cfbimgblt cfbcopyarea [last unloaded: snd_hda_intel]
<4>[  189.533612] CPU: 2 PID: 3860 Comm: rmmod Not tainted
3.17.0-rc2_drm-intel-nightly_4144c9_20140904+ #2116
<4>[  189.533814]  [<ffffffffa001aa7b>] ? drm_mode_config_cleanup+0x9b/0x23f
[drm]
<4>[  189.533917]  [<ffffffffa00133eb>] ? drm_dev_unregister+0x1e/0x8b [drm]
<4>[  189.533938]  [<ffffffffa0013ccf>] ? drm_put_dev+0x45/0x4e [drm]
<4>[  189.534024]  [<ffffffffa0015375>] ? drm_pci_exit+0x39/0x9c [drm]



==Reproduce steps==
---------------------------- 
1. ./drv_module_reload

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