drm/i915: Use msleep instead of mdelay during wait_vblank_off
authorChris Wilson <chris@chris-wilson.co.uk>
Sun, 12 Sep 2010 12:34:08 +0000 (13:34 +0100)
committerChris Wilson <chris@chris-wilson.co.uk>
Sun, 12 Sep 2010 12:34:08 +0000 (13:34 +0100)
Avoid a potentially long busy-wait if we not in the process of
atomically switching to the kdb console.

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

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