drm/i915: Account for space on the ring buffer consumed whilst wrapping.
authorChris Wilson <chris@chris-wilson.co.uk>
Thu, 1 Jul 2010 16:53:00 +0000 (17:53 +0100)
committerEric Anholt <eric@anholt.net>
Thu, 1 Jul 2010 22:28:08 +0000 (15:28 -0700)
If we fill the tail of the physical ring buffer with NOOP when wrapping,
we need to account for the reduction in available space.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Eric Anholt <eric@anholt.net>
drivers/gpu/drm/i915/intel_ringbuffer.c

index a3cac5791d76272b21128399979658e0fe69d3bc..26362f8495a8791ed8d0d75657faa4b6c1af346e 100644 (file)
@@ -687,6 +687,7 @@ int intel_wrap_ring_buffer(struct drm_device *dev,
                *virt++ = MI_NOOP;
 
        ring->tail = 0;
+       ring->space = ring->head - 8;
 
        return 0;
 }