[Bug 65953] New: [GM45]igt/module_reload cause <3>[ 159.350832] [drm:drm_mm_takedown] *ERROR* Memory manager not clean. Delaying takedown

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=65953

          Priority: medium
            Bug ID: 65953
                CC: xunx.fang at intel.com, yangweix.shui at intel.com
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [GM45]igt/module_reload cause <3>[  159.350832]
                    [drm:drm_mm_takedown] *ERROR* Memory manager not
                    clean. Delaying takedown
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

System Environment:
--------------------------
Arch:           x86_64
Platform:       GM45
Kernel: (drm-intel-next-queued)cab8b5862acd55019fbeede6940d1a601912d6b8

Bug detailed description:
-----------------------------
run ./module_reload,  <3>[  159.350832] [drm:drm_mm_takedown] *ERROR* Memory
manager not clean. Delaying takedown appears in dmesg.
It happens on MG45 with dinq kernel, and works well on drm-intel-fixes kernel.
I can't find out a good commit.

output:
module successfully unloaded
module successfully loaded again


Reproduce steps:
----------------------------
1. ./module_reload

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