drm/i915: Propagate error from flushing the ring
authorChris Wilson <chris@chris-wilson.co.uk>
Fri, 7 Jan 2011 17:09:48 +0000 (17:09 +0000)
committerChris Wilson <chris@chris-wilson.co.uk>
Tue, 11 Jan 2011 20:44:50 +0000 (20:44 +0000)
... in order to avoid a BUG() and potential unbounded waits.

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

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