[Bug 98159] SKL GPU hang when execute the dEQP GLES3 case

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98159

            Bug ID: 98159
           Summary: SKL GPU hang when execute the dEQP GLES3 case
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: randy.xu at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Created attachment 127134
  --> https://bugs.freedesktop.org/attachment.cgi?id=127134&action=edit
i915 error state of GPU hang

Execute below dEQP case may cause GPU hang on SKL

$ ./deqp-gles3
--deqp-case=dEQP-GLES3.functional.ubo.single_nested_struct_array.single_buffer.std140_instance_array_fragment
ERROR: <Text>Image comparison failed, got 16384 non-white pixels</Text>

[782161.763223] [drm] stuck on render ring
[782161.763416] [drm] GPU HANG: ecode 9:0:0x85dffffb, in deqp-gles3 [21566],
reason: Engine(s) hung, action: reset
[782161.765222] drm/i915: Resetting chip after gpu hang
[782163.763513] [drm] RC6 on

See attached log for i915 hang state

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