[Bug 92335] New: [HSW Regression] Null pointer deference in intel_mmio_flip_work_func

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92335

            Bug ID: 92335
           Summary: [HSW Regression] Null pointer deference in
                    intel_mmio_flip_work_func
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: andreas.reis at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 118732
  --> https://bugs.freedesktop.org/attachment.cgi?id=118732&action=edit
journalctl -b-1

HSW 4770, instant freezes for about a week now with drm-intel-nightly, so far
when ordinarily browsing with Chromium (full HW acceleration). No indication
what specifically causes it.

journalctl shows an earlier WARN_ON_ONCE(!ppgtt) as well, only since yesterday
so probably unrelated.

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