1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index 48ea0004a56d..5a699746c357 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -248,7 +248,8 @@ static inline int ap_test_config(unsigned int *field, unsigned int nr)
 static inline int ap_test_config_card_id(unsigned int id)
 {
         if (!ap_configuration)  /* QCI not supported */
-                return 1;
+                /* only ids 0...3F may be probed */
+                return id < 0x40 ? 1 : 0;
         return ap_test_config(ap_configuration->apm, id);
 }