[Bug 89742] New: [All regression] igt/ drv_module_reload doesn’t reload module

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89742

            Bug ID: 89742
           Summary: [All regression] igt/ drv_module_reload doesn’t reload
                    module
           Product: DRI
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: high
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: yex.tian at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 114576
  --> https://bugs.freedesktop.org/attachment.cgi?id=114576&action=edit
dmesg info

==System Environment==      
-----------------------------------------------------
Regression: Yes, igt
Good commit: ebd8b32bc6f5046815e00a6bee7f7f6650591cce
Bad  commit: e7d26df4198af40c92292cb4209fd803fa02062f

Non-working platforms: all

==Kernel==
--------------------------------------------------
commit 26db3817223d120e791f36b6be1d52b1aece47c7
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Mon Mar 23 10:36:14 2015 +0100

    drm-intel-nightly: 2015y-03m-23d-09h-35m-35s UTC integration manifest

==Bug detailed description==
-----------------------------
Module unloaded successfully, but it doesn't reload module.
It's igt regression. The return code is 0, and we reboot system after execute
this case. 
I know that there is a bug 88573 about this issue.

Output:
[root at x-hsw24 tests]# ./drv_module_reload
unbinding /sys/class/vtconsole/vtcon0/: (M) frame buffer device
module successfully unloaded
failed to reload module successfully
[root at x-hsw24 tests]# echo $?
0
[root at x-hsw24 tests]# ./drv_module_reload
 i915 debugfs path not found.
Reproduce steps:
----------------------------
1, ./drv_module_reload

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