s390/ap: resend enable adapter interrupt request.

The adapter interrupt for an APQN must be re-enabled after a reset.
This patch sends the interrupt enablement request again, if the APQN
is busy or the reset is still in progress.

Signed-off-by: Holger Dengler <hd@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index b987d4619586..fa5f05c643cb 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -338,6 +338,12 @@ static int ap_queue_enable_interruption(ap_qid_t qid, void *ind)
                         break;
                 case AP_RESPONSE_RESET_IN_PROGRESS:
                 case AP_RESPONSE_BUSY:
+                        if (i < AP_MAX_RESET - 1) {
+                                udelay(5);
+                                status = ap_queue_interruption_control(qid,
+                                                                       ind);
+                                continue;
+                        }
                         break;
                 case AP_RESPONSE_Q_NOT_AVAIL:
                 case AP_RESPONSE_DECONFIGURED: