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drm/i915: convert to using range_overflows
Convert some of the obvious hand-rolled ranged overflow sanity checks to our shiny new range_overflows macro. Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Suggested-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20161213203222.32564-4-matthew.auld@intel.com Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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@ -1140,8 +1140,7 @@ i915_gem_pread_ioctl(struct drm_device *dev, void *data,
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return -ENOENT;
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/* Bounds check source. */
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if (args->offset > obj->base.size ||
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args->size > obj->base.size - args->offset) {
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if (range_overflows_t(u64, args->offset, args->size, obj->base.size)) {
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ret = -EINVAL;
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goto out;
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}
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@ -1454,8 +1453,7 @@ i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
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return -ENOENT;
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/* Bounds check destination. */
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if (args->offset > obj->base.size ||
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args->size > obj->base.size - args->offset) {
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if (range_overflows_t(u64, args->offset, args->size, obj->base.size)) {
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ret = -EINVAL;
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goto err;
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}
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@ -176,10 +176,9 @@ int i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
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if (bind_flags == 0)
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return 0;
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if (GEM_WARN_ON(vma->node.start + vma->node.size < vma->node.start))
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return -ENODEV;
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if (GEM_WARN_ON(vma->node.start + vma->node.size > vma->vm->total))
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if (GEM_WARN_ON(range_overflows(vma->node.start,
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vma->node.size,
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vma->vm->total)))
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return -ENODEV;
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if (vma_flags == 0 && vma->vm->allocate_va_range) {
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