[Bug 69503] New: [HSW Bisected]igt/pc8/i2c fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=69503

          Priority: medium
            Bug ID: 69503
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [HSW Bisected]igt/pc8/i2c fails
        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

Created attachment 86035
  --> https://bugs.freedesktop.org/attachment.cgi?id=86035&action=edit
dmesg

System Environment:
--------------------------
Platform:  Haswell
Kernel: (drm-intel-next-queued) 47e4248c5f2bdd229052564ae1cc47b186409cd2

Bug detailed description:
-----------------------------
It fails on haswell with -queued,-fixes and -nightly kernel.
Following cases also fail:
igt/pc8/batch    
igt/pc8/drm-resources-equal        
igt/pc8/register-compare    
igt/pc8/stress-test    

Bisect shows:9d49c0ef40890064ca552230c2e3ae0e1fb3b617 is the first bad commit.
commit 9d49c0ef40890064ca552230c2e3ae0e1fb3b617
Author:     Paulo Zanoni <paulo.r.zanoni at intel.com>
AuthorDate: Thu Sep 12 18:06:43 2013 -0300
Commit:     Daniel Vetter <daniel.vetter at ffwll.ch>
CommitDate: Fri Sep 13 11:40:19 2013 +0200

    drm/i915: move more code to __i915_drm_thaw

    Both callers had code to sanitize the uncore and restore the GTT
    mappings just before calling __i915_drm_thaw, so Chris suggested I
    should unify the code.

    Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
    Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>


output:
Test assertion failure function get_residency, file pc8.c:124:
Failed assertion: rc == sizeof(ret)
Subtest drm-resources-equal: FAIL
Subtest batch: FAIL
Subtest i2c: FAIL
Subtest stress-test: FAIL
Subtest register-compare: FAIL

Reproduce steps:
----------------------------
1. ./pc8 --run-subtest i2c

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