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drm/i915: Warn before mmaping a purgeable buffer.

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Only allow the user to mmap buffers that have not been marked as
purgeable.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2009-09-22 18:46:17 +01:00
parent bb6baf76f4
commit ab18282d58
1 changed files with 8 additions and 0 deletions
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8
drivers/gpu/drm/i915/i915_gem.c
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@ -1431,6 +1431,14 @@ i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data,
obj_priv = obj->driver_private;
if (obj_priv->madv != I915_MADV_WILLNEED) {
DRM_ERROR("Attempting to mmap a purgeable buffer\n");
drm_gem_object_unreference(obj);
mutex_unlock(&dev->struct_mutex);
return -EINVAL;
}
if (!obj_priv->mmap_offset) {
ret = i915_gem_create_mmap_offset(obj);
if (ret) {