[Bug 79437] New: [PNV Regression]igt/drv_debugfs_reader unable to exit

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79437

          Priority: high
            Bug ID: 79437
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [PNV Regression]igt/drv_debugfs_reader unable to exit
        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 100143
  --> https://bugs.freedesktop.org/attachment.cgi?id=100143&action=edit
dmesg

==System Environment==
--------------------------
Regression: No. 


good commit on -fixes: 24bd9bf54d45d28089251cdf62bf14323d1aa827
bad commit -fixes: d23db88c3ab233daed18709e3a24d6c95344117f


Non-working platforms: PNV

==kernel==
--------------------------
origin/drm-intel-nightly: d13557ac7bfa813cf31fe750df3895f4b0eb9fbe(works)
    drm-intel-nightly: 2014y-05m-28d-15h-34m-25s integration manifest
origin/drm-intel-next-queued: a70995de6e42423549dfa192b71110f67da8530e(works)
    drm/i915: Make intel_dsi_init() return void   
origin/drm-intel-fixes: d23db88c3ab233daed18709e3a24d6c95344117f(fails)
    drm/i915: Prevent negative relocation deltas from wrapping

==Bug detailed description==
-----------------------------
igt/drv_debugfs_reader unable to exit

Output:
[root at x-pnv1 tests]# time ./drv_debugfs_reader

==Reproduce steps==
---------------------------- 
1. ./drv_debugfs_reader

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