From 8738e07d5c9b5b02f113c7e0ba67f0d8d6a5b23c Mon Sep 17 00:00:00 2001
From: Holger Dengler <hd@linux.vnet.ibm.com>
Date: Mon, 2 Jul 2012 12:39:59 +0200
Subject: 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>

diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index b987d46..fa5f05c 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:
-- 
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