drm/i915: Defend against userspace creating a gem object with size==0
We currently only round up the userspace size to the next page. We assume that userspace hasn't made a mistake and requested a zero-length gem object and all through our internal code we then presume that every object is backed by at least a single page. Fix that oversight and report EINVAL back to userspace if they try to create a zero length object. [danvet: This fixes tests/gem_bad_length] Signed-off-by:Chris Wilson <chris@chris-wilson.co.uk> Signed-Off-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by:
Ben Widawsky <ben@bwidawsk.net> Signed-off-by:
Keith Packard <keithp@keithp.com>
parent
6dacfd2f
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