diff --git a/drivers/scsi/stex.c b/drivers/scsi/stex.c
index 81dd3b740daf8d713a96b53dffe4fcec92082dcc..47c2ef917feacd123a6c2551760e362d0396dae2 100644
--- a/drivers/scsi/stex.c
+++ b/drivers/scsi/stex.c
@@ -612,6 +612,13 @@ stex_queuecommand(struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *))
 			return 0;
 		}
 		break;
+	case TEST_UNIT_READY:
+		if (id == host->max_id - 1) {
+			cmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8;
+			done(cmd);
+			return 0;
+		}
+		break;
 	case INQUIRY:
 		if (id != host->max_id - 1)
 			break;