https://bugs.freedesktop.org/show_bug.cgi?id=38022
--- Comment #17 from Florian Mickler florian@mickler.org 2012-01-21 08:44:59 PST --- A patch referencing this bug report has been merged in Linux v3.2-rc1:
commit 77b1bad423599c9841ea282a82172f039bb2ff92 Author: Jerome Glisse jglisse@redhat.com Date: Wed Oct 26 11:41:22 2011 -0400
drm/radeon: flush read cache for gtt with fence on r6xx and newer GPU V3