drm/amdgpu: No longer insert ras blocks into ras_list if it already exists in ras_list

No longer insert ras blocks into ras_list if it already exists in ras_list.
Signed-off-by: yipechai <YiPeng.Chai@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -2753,12 +2753,20 @@ int amdgpu_ras_reset_gpu(struct amdgpu_device *adev)
 int amdgpu_ras_register_ras_block(struct amdgpu_device *adev,
 		struct amdgpu_ras_block_object* ras_block_obj)
 {
+	struct amdgpu_ras_block_object *obj, *tmp;
 	if (!adev || !ras_block_obj)
 		return -EINVAL;
 
 	if (!amdgpu_ras_asic_supported(adev))
 		return 0;
 
+	/* If the ras object is in ras_list, don't add it again */
+	list_for_each_entry_safe(obj, tmp, &adev->ras_list, node) {
+		if (obj == ras_block_obj) {
+			return 0;
+		}
+	}
+
 	INIT_LIST_HEAD(&ras_block_obj->node);
 	list_add_tail(&ras_block_obj->node, &adev->ras_list);