[Intel-gfx] [PATCH 1/4] drm/i915: Unroll wrapping of the ringbuffer.

[Chris Wilson]

The tail is quadword aligned, so we can add two MI_NOOP as a time.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/intel_ringbuffer.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index f914c42..b5ccee5 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -702,9 +702,11 @@ int intel_wrap_ring_buffer(struct drm_device *dev,
 	}
 
 	virt = (unsigned int *)(ring->virtual_start + ring->tail);
-	rem /= 4;
-	while (rem--)
+	rem /= 8;
+	while (rem--) {
 		*virt++ = MI_NOOP;
+		*virt++ = MI_NOOP;
+	}
 
 	ring->tail = 0;
 	ring->space = ring->head - 8;
-- 
1.7.1