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Commit ab18282d authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915: Warn before mmaping a purgeable buffer. 



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

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
parent bb6baf76

drivers/gpu/drm/i915/i915_gem.c

+8 −0
Original line number Original line Diff line number Diff line
@@ -1431,6 +1431,14 @@ i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data, 




	obj_priv = obj->driver_private;

	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) {

	if (!obj_priv->mmap_offset) {

		ret = i915_gem_create_mmap_offset(obj);

		ret = i915_gem_create_mmap_offset(obj);

		if (ret) {

		if (ret) {