diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index 90bd22014513..d334b0f7a1ec 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -1231,8 +1231,9 @@ static void ap_reset_domain(void)
 {
 	int i;
 
-	for (i = 0; i < AP_DEVICES; i++)
-		ap_reset_queue(AP_MKQID(i, ap_domain_index));
+	if (ap_domain_index != -1)
+		for (i = 0; i < AP_DEVICES; i++)
+			ap_reset_queue(AP_MKQID(i, ap_domain_index));
 }
 
 static void ap_reset_all(void)