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            <b><a class="bz_bug_link 
          bz_status_NEEDINFO "
   title="NEEDINFO - [BYT,BSW] RPM wakelock ref not held during HW access (intel_pre_plane_update->intel_set_memory_cxsr)"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=93440#c2">Comment # 2</a>
              on <a class="bz_bug_link 
          bz_status_NEEDINFO "
   title="NEEDINFO - [BYT,BSW] RPM wakelock ref not held during HW access (intel_pre_plane_update->intel_set_memory_cxsr)"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=93440">bug 93440</a>
              from <span class="vcard"><a class="email" href="mailto:imre.deak@intel.com" title="Imre Deak <imre.deak@intel.com>"> <span class="fn">Imre Deak</span></a>
</span></b>
        <pre>(In reply to Jani Nikula from <a href="show_bug.cgi?id=93440#c1">comment #1</a>)
<span class="quote">> Imre, do the recent fixes in the area cover this one as well?</span >

Yes, I believe that either of the following ones fixed it:

commit 177246a84d133888b5428e44201282d94635f473
Author: Matt Roper <<a href="mailto:matthew.d.roper@intel.com">matthew.d.roper@intel.com</a>>
Date:   Fri Mar 4 15:59:39 2016 -0800

    drm/i915: Wait until after wm optimization to drop runtime PM reference


or 

<a href="https://lists.freedesktop.org/archives/intel-gfx/2016-February/087538.html">https://lists.freedesktop.org/archives/intel-gfx/2016-February/087538.html</a></pre>
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