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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - Corruption with DMA ring on cayman"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=60802#c32">Comment # 32</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - Corruption with DMA ring on cayman"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=60802">bug 60802</a>
              from <span class="vcard"><a class="email" href="mailto:agd5f@yahoo.com" title="Alex Deucher <agd5f@yahoo.com>"> <span class="fn">Alex Deucher</span></a>
</span></b>
        <pre>Created <span class=""><a href="attachment.cgi?id=75658" name="attach_75658" title="align dma commands to 8 dwords">attachment 75658</a> <a href="attachment.cgi?id=75658&action=edit" title="align dma commands to 8 dwords">[details]</a></span> <a href='page.cgi?id=splinter.html&bug=60802&attachment=75658'>[review]</a>
align dma commands to 8 dwords

Does this patch help?  You might also try it in combination with this patch:
<a href="http://lists.freedesktop.org/archives/mesa-dev/2013-February/035347.html">http://lists.freedesktop.org/archives/mesa-dev/2013-February/035347.html</a></pre>
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