[S390] zcrypt: fix PCIXCC/CEX2C error recovery

Symptom:     zcrypt fails by setting all PCIXCC/CEX2C cards offline for a
             certain type of invalid keys.
Problem:     zcrypt does not handle rc=12/rs=769 request responses correctly
Solution:    modify convert_type86_ica() to handle these error codes correctly
Signed-off-by: Ralph Wuerthner <rwuerthn@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/crypto/zcrypt_pcixcc.c

@@ -432,14 +432,17 @@ static int convert_type86_ica(struct zcrypt_device *zdev,
 		}
 		if (service_rc == 8 && service_rs == 770) {
 			PDEBUG("Invalid key length on PCIXCC/CEX2C\n");
-			zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE_OLD;
-			return -EAGAIN;
+			return -EINVAL;
 		}
 		if (service_rc == 8 && service_rs == 783) {
 			PDEBUG("Extended bitlengths not enabled on PCIXCC/CEX2C\n");
 			zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE_OLD;
 			return -EAGAIN;
 		}
+		if (service_rc == 12 && service_rs == 769) {
+			PDEBUG("Invalid key on PCIXCC/CEX2C\n");
+			return -EINVAL;
+		}
 		PRINTK("Unknown service rc/rs (PCIXCC/CEX2C): %d/%d\n",
 		       service_rc, service_rs);
 		zdev->online = 0;