Make intel_render_ring_init_dri and intel_init_ring_buffer symmetrical
with regards of workaround introduced by:

commit 27c1cbd06a7620b354cbb363834f3bb8df4f410d
Author: Chris Wilson <[email protected]>
Date:   Mon Apr 9 13:59:46 2012 +0100

    drm/i915/ringbuffer: Exclude last 2 cachlines of ring on 845g

Signed-off-by: Mika Kuoppala <[email protected]>
---
 drivers/gpu/drm/i915/intel_ringbuffer.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c 
b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 785df4f..b13393b 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1590,7 +1590,7 @@ int intel_render_ring_init_dri(struct drm_device *dev, 
u64 start, u32 size)
 
        ring->size = size;
        ring->effective_size = ring->size;
-       if (IS_I830(ring->dev))
+       if (IS_I830(ring->dev) || IS_845G(ring->dev))
                ring->effective_size -= 128;
 
        ring->virtual_start = ioremap_wc(start, size);
-- 
1.7.9.5

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