Konstantin Belousov b11d58b63f Do not call malloc(M_WAITOK) while bodev->fence_lock mutex is
held. The ttm_buffer_object_transfer() does not need the mutex locked
at all, except for the call to the driver sync_obj_ref() method.

Reported and tested by:	dumbbell
MFC after:   2 weeks
2013-03-23 22:23:15 +00:00
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