crypto: ccm - use template array registering API to simplify the code

Use crypto template array registering API 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>

crypto/ccm.c

@@ -589,12 +589,6 @@ static int crypto_ccm_create(struct crypto_template *tmpl, struct rtattr **tb)
 					mac_name);
 }
 
-static struct crypto_template crypto_ccm_tmpl = {
-	.name = "ccm",
-	.create = crypto_ccm_create,
-	.module = THIS_MODULE,
-};
-
 static int crypto_ccm_base_create(struct crypto_template *tmpl,
 				  struct rtattr **tb)
 {
@@ -618,12 +612,6 @@ static int crypto_ccm_base_create(struct crypto_template *tmpl,
 					cipher_name);
 }
 
-static struct crypto_template crypto_ccm_base_tmpl = {
-	.name = "ccm_base",
-	.create = crypto_ccm_base_create,
-	.module = THIS_MODULE,
-};
-
 static int crypto_rfc4309_setkey(struct crypto_aead *parent, const u8 *key,
 				 unsigned int keylen)
 {
@@ -854,12 +842,6 @@ static int crypto_rfc4309_create(struct crypto_template *tmpl,
 	goto out;
 }
 
-static struct crypto_template crypto_rfc4309_tmpl = {
-	.name = "rfc4309",
-	.create = crypto_rfc4309_create,
-	.module = THIS_MODULE,
-};
-
 static int crypto_cbcmac_digest_setkey(struct crypto_shash *parent,
 				     const u8 *inkey, unsigned int keylen)
 {
@@ -999,51 +981,37 @@ static int cbcmac_create(struct crypto_template *tmpl, struct rtattr **tb)
 	return err;
 }
 
-static struct crypto_template crypto_cbcmac_tmpl = {
+static struct crypto_template crypto_ccm_tmpls[] = {
+	{
 		.name = "cbcmac",
 		.create = cbcmac_create,
 		.free = shash_free_instance,
 		.module = THIS_MODULE,
+	}, {
+		.name = "ccm_base",
+		.create = crypto_ccm_base_create,
+		.module = THIS_MODULE,
+	}, {
+		.name = "ccm",
+		.create = crypto_ccm_create,
+		.module = THIS_MODULE,
+	}, {
+		.name = "rfc4309",
+		.create = crypto_rfc4309_create,
+		.module = THIS_MODULE,
+	},
 };
 
 static int __init crypto_ccm_module_init(void)
 {
-	int err;
-
-	err = crypto_register_template(&crypto_cbcmac_tmpl);
-	if (err)
-		goto out;
-
-	err = crypto_register_template(&crypto_ccm_base_tmpl);
-	if (err)
-		goto out_undo_cbcmac;
-
-	err = crypto_register_template(&crypto_ccm_tmpl);
-	if (err)
-		goto out_undo_base;
-
-	err = crypto_register_template(&crypto_rfc4309_tmpl);
-	if (err)
-		goto out_undo_ccm;
-
-out:
-	return err;
-
-out_undo_ccm:
-	crypto_unregister_template(&crypto_ccm_tmpl);
-out_undo_base:
-	crypto_unregister_template(&crypto_ccm_base_tmpl);
-out_undo_cbcmac:
-	crypto_register_template(&crypto_cbcmac_tmpl);
-	goto out;
+	return crypto_register_templates(crypto_ccm_tmpls,
+					 ARRAY_SIZE(crypto_ccm_tmpls));
 }
 
 static void __exit crypto_ccm_module_exit(void)
 {
-	crypto_unregister_template(&crypto_rfc4309_tmpl);
-	crypto_unregister_template(&crypto_ccm_tmpl);
-	crypto_unregister_template(&crypto_ccm_base_tmpl);
-	crypto_unregister_template(&crypto_cbcmac_tmpl);
+	crypto_unregister_templates(crypto_ccm_tmpls,
+				    ARRAY_SIZE(crypto_ccm_tmpls));
 }
 
 module_init(crypto_ccm_module_init);