s390/zcrypt: don't report online if card or queue is in check-stop state

If a card or a queue is in check-stop state, it can't be used by
applications to perform crypto operations. Applications check the 'online'
sysfs attribute to check if a card or queue is usable.

Report a card or queue as offline in case it is in check-stop state.
Furthermore, don't allow to set a card or queue online, if it is in
check-stop state.

This is similar to when the card or the queue is in deconfigured state,
there it is also reported as being offline, and it can't be set online.
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

drivers/s390/crypto/zcrypt_card.c

@@ -52,7 +52,7 @@ static ssize_t online_show(struct device *dev,
 {
 	struct zcrypt_card *zc = dev_get_drvdata(dev);
 	struct ap_card *ac = to_ap_card(dev);
-	int online = ac->config && zc->online ? 1 : 0;
+	int online = ac->config && !ac->chkstop && zc->online ? 1 : 0;
 
 	return sysfs_emit(buf, "%d\n", online);
 }
@@ -70,7 +70,7 @@ static ssize_t online_store(struct device *dev,
 	if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1)
 		return -EINVAL;
 
-	if (online && !ac->config)
+	if (online && (!ac->config || ac->chkstop))
 		return -ENODEV;
 
 	zc->online = online;

drivers/s390/crypto/zcrypt_queue.c

@@ -42,7 +42,7 @@ static ssize_t online_show(struct device *dev,
 {
 	struct zcrypt_queue *zq = dev_get_drvdata(dev);
 	struct ap_queue *aq = to_ap_queue(dev);
-	int online = aq->config && zq->online ? 1 : 0;
+	int online = aq->config && !aq->chkstop && zq->online ? 1 : 0;
 
 	return sysfs_emit(buf, "%d\n", online);
 }
@@ -59,7 +59,8 @@ static ssize_t online_store(struct device *dev,
 	if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1)
 		return -EINVAL;
 
-	if (online && (!aq->config || !aq->card->config))
+	if (online && (!aq->config || !aq->card->config ||
+		       aq->chkstop || aq->card->chkstop))
 		return -ENODEV;
 	if (online && !zc->online)
 		return -EINVAL;