drm/i915: Bail if we attempt to allocate pages for a purged object
Move the existing checking inside bind_to_gtt() to the more appropriate layer in order to prevent recreation of the pages after they have been explicitly truncated. Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk> Reviewed-by: NImre Deak <imre.deak@intel.com> Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
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