[Bug 68251] New: [IVB Apple MacBook pro] dmesg of machine boot up with "call trace" and *ERROR* mismatch in pch_pfit.pos (expected 0, found 80)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=68251

          Priority: medium
            Bug ID: 68251
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [IVB Apple MacBook pro] dmesg of machine boot up with
                    "call trace" and *ERROR* mismatch in pch_pfit.pos
                    (expected 0, found 80)
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: All
          Reporter: yangweix.shui at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 84218
  --> https://bugs.freedesktop.org/attachment.cgi?id=84218&action=edit
dmesg: boot up with call trace and error on IVB (Apple Macbook Pro)

Environment:
--------------------------
Kernel: (drm-intel-next-queued)815ca9817afc1c1a45799fb9d4a4f413b7b1517c
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Wed Aug 14 14:14:04 2013 +0200

    drm/i915: inline vma_create into lookup_or_create_vma

Description:
--------------------------
Test with latest -next-queued kernel, there's "call trace" and error messages
in dmesg after machine booting up. I have tried other IVB platforms, there's no
such issue. I can't find a good commit by checking some older kernels. 

Reproduce step:
--------------------------
1. change kernel and reboot
2. check the dmesg

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