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drm/i915: First recheck for an empty fence register.
authorChris Wilson <chris@chris-wilson.co.uk>
Wed, 11 Feb 2009 14:26:44 +0000 (14:26 +0000)
committerEric Anholt <eric@anholt.net>
Wed, 11 Mar 2009 03:22:24 +0000 (20:22 -0700)
If we wait upon a request and successfully unbind a buffer occupying a
fence register, then that slot will be freed and cause a NULL derefrence
upon rescanning.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Eric Anholt <eric@anholt.net>

No differences found
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