From cadafa01f838e762f1535044b6a41b2c236b7edf Mon Sep 17 00:00:00 2001
From: Xiongfeng Wang <xiongfeng.wang@linaro.org>
Date: Thu, 8 Aug 2019 15:26:49 +0800
Subject: [PATCH] crypto: api - add a helper to (un)register a array of
 templates

mainline inclusion
from mainline-5.0-rc1
commit 9572442dcf487e534e70b30f43e21a364cf483e9
category: feature
bugzilla: 20209
CVE: NA
---------------------------

This patch add a helper to (un)register a array of templates. The
following patches will use this helper to simplify the code.

Signed-off-by: Xiongfeng Wang <xiongfeng.wang@linaro.org>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Reviewed-by: ZhangXiaoxu <zhangxiaoxu5@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
 crypto/algapi.c         | 27 +++++++++++++++++++++++++++
 include/crypto/algapi.h |  2 ++
 2 files changed, 29 insertions(+)

diff --git a/crypto/algapi.c b/crypto/algapi.c
index c0755cf4f53f..a0f9e807fdb4 100644
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -485,6 +485,24 @@ int crypto_register_template(struct crypto_template *tmpl)
 }
 EXPORT_SYMBOL_GPL(crypto_register_template);
 
+int crypto_register_templates(struct crypto_template *tmpls, int count)
+{
+	int i, err;
+
+	for (i = 0; i < count; i++) {
+		err = crypto_register_template(&tmpls[i]);
+		if (err)
+			goto out;
+	}
+	return 0;
+
+out:
+	for (--i; i >= 0; --i)
+		crypto_unregister_template(&tmpls[i]);
+	return err;
+}
+EXPORT_SYMBOL_GPL(crypto_register_templates);
+
 void crypto_unregister_template(struct crypto_template *tmpl)
 {
 	struct crypto_instance *inst;
@@ -514,6 +532,15 @@ void crypto_unregister_template(struct crypto_template *tmpl)
 }
 EXPORT_SYMBOL_GPL(crypto_unregister_template);
 
+void crypto_unregister_templates(struct crypto_template *tmpls, int count)
+{
+	int i;
+
+	for (i = count - 1; i >= 0; --i)
+		crypto_unregister_template(&tmpls[i]);
+}
+EXPORT_SYMBOL_GPL(crypto_unregister_templates);
+
 static struct crypto_template *__crypto_lookup_template(const char *name)
 {
 	struct crypto_template *q, *tmpl = NULL;
diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
index bd5e8ccf1687..6b9cd6597617 100644
--- a/include/crypto/algapi.h
+++ b/include/crypto/algapi.h
@@ -141,7 +141,9 @@ extern const struct crypto_type crypto_blkcipher_type;
 void crypto_mod_put(struct crypto_alg *alg);
 
 int crypto_register_template(struct crypto_template *tmpl);
+int crypto_register_templates(struct crypto_template *tmpls, int count);
 void crypto_unregister_template(struct crypto_template *tmpl);
+void crypto_unregister_templates(struct crypto_template *tmpls, int count);
 struct crypto_template *crypto_lookup_template(const char *name);
 
 int crypto_register_instance(struct crypto_template *tmpl,
-- 
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