add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/s390/crypto/zcrypt_queue.c
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@@ -1,7 +1,5 @@
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 // SPDX-License-Identifier: GPL-2.0+
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 /*
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- *  zcrypt 2.1.0
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- *
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  *  Copyright IBM Corp. 2001, 2012
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  *  Author(s): Robert Burroughs
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  *	       Eric Rossman (edrossma@us.ibm.com)
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@@ -42,22 +40,27 @@
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 			   struct device_attribute *attr,
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 			   char *buf)
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 {
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-	struct zcrypt_queue *zq = to_ap_queue(dev)->private;
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+	struct ap_queue *aq = to_ap_queue(dev);
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+	struct zcrypt_queue *zq = aq->private;
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+	int online = aq->config && zq->online ? 1 : 0;
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-	return snprintf(buf, PAGE_SIZE, "%d\n", zq->online);
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+	return scnprintf(buf, PAGE_SIZE, "%d\n", online);
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 }
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 static ssize_t online_store(struct device *dev,
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 			    struct device_attribute *attr,
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 			    const char *buf, size_t count)
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 {
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-	struct zcrypt_queue *zq = to_ap_queue(dev)->private;
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+	struct ap_queue *aq = to_ap_queue(dev);
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+	struct zcrypt_queue *zq = aq->private;
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 	struct zcrypt_card *zc = zq->zcard;
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 	int online;
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 	if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1)
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 		return -EINVAL;
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+	if (online && (!aq->config || !aq->card->config))
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+		return -ENODEV;
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 	if (online && !zc->online)
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 		return -EINVAL;
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 	zq->online = online;
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@@ -80,7 +83,7 @@
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 {
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 	struct zcrypt_queue *zq = to_ap_queue(dev)->private;
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-	return snprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&zq->load));
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+	return scnprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&zq->load));
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 }
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 static DEVICE_ATTR_RO(load);
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@@ -109,10 +112,10 @@
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 	zq = kzalloc(sizeof(struct zcrypt_queue), GFP_KERNEL);
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 	if (!zq)
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 		return NULL;
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-	zq->reply.message = kmalloc(max_response_size, GFP_KERNEL);
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-	if (!zq->reply.message)
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+	zq->reply.msg = kmalloc(max_response_size, GFP_KERNEL);
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+	if (!zq->reply.msg)
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 		goto out_free;
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-	zq->reply.length = max_response_size;
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+	zq->reply.len = max_response_size;
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 	INIT_LIST_HEAD(&zq->list);
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 	kref_init(&zq->refcount);
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 	return zq;
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@@ -125,7 +128,7 @@
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 void zcrypt_queue_free(struct zcrypt_queue *zq)
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 {
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-	kfree(zq->reply.message);
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+	kfree(zq->reply.msg);
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 	kfree(zq);
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 }
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 EXPORT_SYMBOL(zcrypt_queue_free);
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@@ -177,7 +180,6 @@
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 				&zcrypt_queue_attr_group);
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 	if (rc)
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 		goto out;
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-	get_device(&zq->queue->ap_dev.device);
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 	if (zq->ops->rng) {
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 		rc = zcrypt_rng_device_add();
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@@ -189,7 +191,6 @@
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 out_unregister:
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 	sysfs_remove_group(&zq->queue->ap_dev.device.kobj,
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 			   &zcrypt_queue_attr_group);
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-	put_device(&zq->queue->ap_dev.device);
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 out:
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 	spin_lock(&zcrypt_list_lock);
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 	list_del_init(&zq->list);
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@@ -217,12 +218,11 @@
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 	list_del_init(&zq->list);
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 	zcrypt_device_count--;
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 	spin_unlock(&zcrypt_list_lock);
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-	zcrypt_card_put(zc);
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 	if (zq->ops->rng)
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 		zcrypt_rng_device_remove();
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 	sysfs_remove_group(&zq->queue->ap_dev.device.kobj,
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 			   &zcrypt_queue_attr_group);
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-	put_device(&zq->queue->ap_dev.device);
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+	zcrypt_card_put(zc);
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 	zcrypt_queue_put(zq);
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 }
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 EXPORT_SYMBOL(zcrypt_queue_unregister);