Comment # 46 on bug 55692 from Christian König

Created attachment 68906 [details] [review]
Possible fix.

Ok, please try the attached patch. It should fix the issue with the original
"async page table updates patch".

Please note that Alex current drm-fixes-3.7 branch already contains another
patch that is also masquerading this problem, so please test with the original
drm-next-3.7 branch.

I've submitted a series of patches that should fix and cleanup the code.