diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index 1d91a32db08ef3..d9cd25b56cfae5 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -35,11 +35,23 @@ enum zfcp_erp_steps {
 	ZFCP_ERP_STEP_LUN_OPENING	= 0x2000,
 };
 
+/**
+ * enum zfcp_erp_act_type - Type of ERP action object.
+ * @ZFCP_ERP_ACTION_REOPEN_LUN: LUN recovery.
+ * @ZFCP_ERP_ACTION_REOPEN_PORT: Port recovery.
+ * @ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: Forced port recovery.
+ * @ZFCP_ERP_ACTION_REOPEN_ADAPTER: Adapter recovery.
+ * @ZFCP_ERP_ACTION_NONE: Eyecatcher pseudo flag to bitwise or-combine with
+ *			  either of the other enum values.
+ *			  Used to indicate that an ERP action could not be
+ *			  set up despite a detected need for some recovery.
+ */
 enum zfcp_erp_act_type {
 	ZFCP_ERP_ACTION_REOPEN_LUN         = 1,
 	ZFCP_ERP_ACTION_REOPEN_PORT	   = 2,
 	ZFCP_ERP_ACTION_REOPEN_PORT_FORCED = 3,
 	ZFCP_ERP_ACTION_REOPEN_ADAPTER     = 4,
+	ZFCP_ERP_ACTION_NONE		   = 0xc0,
 };
 
 enum zfcp_erp_act_state {
@@ -257,8 +269,10 @@ static int zfcp_erp_action_enqueue(int want, struct zfcp_adapter *adapter,
 		goto out;
 
 	act = zfcp_erp_setup_act(need, act_status, adapter, port, sdev);
-	if (!act)
+	if (!act) {
+		need |= ZFCP_ERP_ACTION_NONE; /* marker for trace */
 		goto out;
+	}
 	atomic_or(ZFCP_STATUS_ADAPTER_ERP_PENDING, &adapter->status);
 	++adapter->erp_total_count;
 	list_add_tail(&act->list, &adapter->erp_ready_head);