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-rw-r--r--drivers/s390/crypto/ap_bus.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index b15013234c77..78c99ae42b1f 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -271,8 +271,11 @@ static int ap_query_queue(ap_qid_t qid, int *queue_depth, int *device_type,
*facilities = (unsigned int)(info >> 32);
/* Update maximum domain id */
nd = (info >> 16) & 0xff;
+ /* if N bit is available, z13 and newer */
if ((info & (1UL << 57)) && nd > 0)
ap_max_domain_id = nd;
+ else /* older machine types */
+ ap_max_domain_id = 15;
switch (*device_type) {
/* For CEX2 and CEX3 the available functions
* are not refrected by the facilities bits.