1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c
index f82a2dd83874..7eed523bf28f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c
@@ -62,6 +62,39 @@ static int amdgpu_bo_list_create(struct amdgpu_fpriv *fpriv,
 	return 0;
 }
 
+struct amdgpu_bo_list *
+amdgpu_bo_list_clone(struct amdgpu_bo_list *list)
+{
+	struct amdgpu_bo_list *result;
+	unsigned i;
+
+	result = kmalloc(sizeof(struct amdgpu_bo_list), GFP_KERNEL);
+	if (!result)
+		return NULL;
+
+	result->array = drm_calloc_large(list->num_entries,
+		sizeof(struct amdgpu_bo_list_entry));
+	if (!result->array) {
+		kfree(result);
+		return NULL;
+	}
+
+	mutex_init(&result->lock);
+	result->gds_obj = list->gds_obj;
+	result->gws_obj = list->gws_obj;
+	result->oa_obj = list->oa_obj;
+	result->has_userptr = list->has_userptr;
+	result->num_entries = list->num_entries;
+
+	memcpy(result->array, list->array, list->num_entries *
+	       sizeof(struct amdgpu_bo_list_entry));
+
+	for (i = 0; i < result->num_entries; ++i)
+		amdgpu_bo_ref(result->array[i].robj);
+
+	return result;
+}
+
 static void amdgpu_bo_list_destroy(struct amdgpu_fpriv *fpriv, int id)
 {
 	struct amdgpu_bo_list *list;