On Mon, May 28, 2012 at 10:33:02PM +0100, Chris Wilson wrote: > When we reset the ring control registers, including the HEAD and TAIL of > the ring, we also need to reset associated state. In this instance, we > were failing to reset the cached value of ring->last_retired_head and so > upon the first request for more space following a resume would > potentially (depending on a narrow race window) believe that the HEAD had > advanced much further than reality. > > This is a regression from: > > commit a71d8d94525e8fd855c0466fb586ae1cb008f3a2 > Author: Chris Wilson <chris at chris-wilson.co.uk> > Date: Wed Feb 15 11:25:36 2012 +0000 > > drm/i915: Record the tail at each request and use it to estimate the head > > Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk> > Cc: stable at vger.kernel.org # 3.4 Applied to -fixes, thanks for spotting this. -Daniel -- Daniel Vetter Mail: daniel at ffwll.ch Mobile: +41 (0)79 365 57 48
