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drm/i915: convert to using range_overflows

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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>
This commit is contained in:
Matthew Auld 2016-12-13 20:32:22 +00:00 committed by Chris Wilson
parent 86e6173571
commit 966d5bf5eb
2 changed files with 5 additions and 8 deletions
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6
drivers/gpu/drm/i915/i915_gem.c
View File

@ -1140,8 +1140,7 @@ i915_gem_pread_ioctl(struct drm_device *dev, void *data,
return -ENOENT;
/* Bounds check source. */
if (args->offset > obj->base.size ||
args->size > obj->base.size - args->offset) {
if (range_overflows_t(u64, args->offset, args->size, obj->base.size)) {
ret = -EINVAL;
goto out;
}
@ -1454,8 +1453,7 @@ i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
return -ENOENT;
/* Bounds check destination. */
if (args->offset > obj->base.size ||
args->size > obj->base.size - args->offset) {
if (range_overflows_t(u64, args->offset, args->size, obj->base.size)) {
ret = -EINVAL;
goto err;
}

7
drivers/gpu/drm/i915/i915_vma.c
View File

@ -176,10 +176,9 @@ int i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
if (bind_flags == 0)
return 0;
if (GEM_WARN_ON(vma->node.start + vma->node.size < vma->node.start))
return -ENODEV;
if (GEM_WARN_ON(vma->node.start + vma->node.size > vma->vm->total))
if (GEM_WARN_ON(range_overflows(vma->node.start,
vma->node.size,
vma->vm->total)))
return -ENODEV;
if (vma_flags == 0 && vma->vm->allocate_va_range) {