target: return SAM_STAT_TASK_SET_FULL for TCM_OUT_OF_RESOURCES

TCM_OUT_OF_RESOURCES is getting translated to
TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE which seems like a heavy
error when we just cannot allocate a resource that may be
allocatable later. This has us translate TCM_OUT_OF_RESOURCES
to SAM_STAT_TASK_SET_FULL instead.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

drivers/target/target_core_transport.c

@@ -1772,8 +1772,8 @@ void transport_generic_request_failure(struct se_cmd *cmd,
 	case TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE:
 		break;
 	case TCM_OUT_OF_RESOURCES:
-		sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-		break;
+		cmd->scsi_status = SAM_STAT_TASK_SET_FULL;
+		goto queue_status;
 	case TCM_RESERVATION_CONFLICT:
 		/*
 		 * No SENSE Data payload for this case, set SCSI Status
@@ -1795,11 +1795,8 @@ void transport_generic_request_failure(struct se_cmd *cmd,
 					       cmd->orig_fe_lun, 0x2C,
 					ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS);
 		}
-		trace_target_cmd_complete(cmd);
-		ret = cmd->se_tfo->queue_status(cmd);
-		if (ret)
-			goto queue_full;
-		goto check_stop;
+
+		goto queue_status;
 	default:
 		pr_err("Unknown transport error for CDB 0x%02x: %d\n",
 			cmd->t_task_cdb[0], sense_reason);
@@ -1816,6 +1813,11 @@ void transport_generic_request_failure(struct se_cmd *cmd,
 	transport_cmd_check_stop_to_fabric(cmd);
 	return;
 
+queue_status:
+	trace_target_cmd_complete(cmd);
+	ret = cmd->se_tfo->queue_status(cmd);
+	if (!ret)
+		goto check_stop;
 queue_full:
 	transport_handle_queue_full(cmd, cmd->se_dev, ret, false);
 }