drm/i915: Defend against userspace creating a gem object with size==0

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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>

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Chris Wilson 2011-09-14 14:14:28 +02:00 • committed by Keith Packard

parent 6dacfd2faa

commit 8ffc024681

1 changed files with 2 additions and 0 deletions

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drivers/gpu/drm/i915/i915_gem.c

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