drm/amdgpu: return error if both BOs and bo_list handle is given

Return -EINVAL when both the BOs as well as a list handle is provided in
the IOCTL.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming  Zhou <david1.zhou@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c

@@ -572,14 +572,17 @@ static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p,
 	INIT_LIST_HEAD(&p->validated);
 
 	/* p->bo_list could already be assigned if AMDGPU_CHUNK_ID_BO_HANDLES is present */
-	if (p->bo_list) {
-		mutex_lock(&p->bo_list->lock);
+	if (cs->in.bo_list_handle) {
+		if (p->bo_list)
+			return -EINVAL;
 
-	} else if (cs->in.bo_list_handle) {
 		r = amdgpu_bo_list_get(fpriv, cs->in.bo_list_handle,
 				       &p->bo_list);
 		if (r)
 			return r;
+
+	} else if (p->bo_list) {
+		mutex_lock(&p->bo_list->lock);
 	}
 
 	if (p->bo_list) {