[Bug 85118] New: [SNB]igt/gem_double_irq_loop causes system hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85118

            Bug ID: 85118
           Summary: [SNB]igt/gem_double_irq_loop causes system hang
           Product: DRI
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: critical
          Priority: high
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: huax.lu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 107966
  --> https://bugs.freedesktop.org/attachment.cgi?id=107966&action=edit
dmesg

==System Environment==
--------------------------
Regression: not sure, I can't reproduce it manually.

Non-working platforms: SNB

==kernel==
--------------------------
drm-intel-fixes/bfe01a5ba2490f299e1d2d5508cbbbadd897bbe9

==Bug detailed description==
-----------------------------
Run igt automation testing, it causes system hang. I can't reproduce it
manually. 
automation case list:
igt_gem_ctx_basic 
igt_gem_ctx_create 
igt_gem_ctx_exec_basic   
igt_gem_ctx_exec_eviction  
igt_gem_ctx_exec_reset-pin-leak  
gem_double_irq_loop


Reproduce steps:
-------------------------
1. Run all igt case.

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