drm/i915/ringbuffer: Fix emit batch buffer regression from 8187a2b
authorChris Wilson <chris@chris-wilson.co.uk>
Thu, 21 Oct 2010 17:51:09 +0000 (18:51 +0100)
committerChris Wilson <chris@chris-wilson.co.uk>
Thu, 21 Oct 2010 17:51:09 +0000 (18:51 +0100)
In commit 8187a2b, the number of dwords used in the ringbuffer for
executing the batch buffer was erroneously changed from 2 to 4.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

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