linux-kernel - [PATCH -next] PKCS#7: Use match_string() helper to simplify the code

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Date:   Mon, 30 Dec 2019 10:28:42 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     <dhowells@...hat.com>, <herbert@...dor.apana.org.au>,
        <davem@...emloft.net>
CC:     <keyrings@...r.kernel.org>, <linux-crypto@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, YueHaibing <yuehaibing@...wei.com>
Subject: [PATCH -next] PKCS#7: Use match_string() helper to simplify the code

match_string() returns the array index of a matching string.
Use it instead of the open-coded implementation.

Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 crypto/asymmetric_keys/pkcs7_verify.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/crypto/asymmetric_keys/pkcs7_verify.c b/crypto/asymmetric_keys/pkcs7_verify.c
index ce49820..0b4d07a 100644
--- a/crypto/asymmetric_keys/pkcs7_verify.c
+++ b/crypto/asymmetric_keys/pkcs7_verify.c
@@ -141,11 +141,10 @@ int pkcs7_get_digest(struct pkcs7_message *pkcs7, const u8 **buf, u32 *len,
 	*buf = sinfo->sig->digest;
 	*len = sinfo->sig->digest_size;
 
-	for (i = 0; i < HASH_ALGO__LAST; i++)
-		if (!strcmp(hash_algo_name[i], sinfo->sig->hash_algo)) {
-			*hash_algo = i;
-			break;
-		}
+	i = match_string(hash_algo_name, HASH_ALGO__LAST,
+			 sinfo->sig->hash_algo);
+	if (i >= 0)
+		*hash_algo = i;
 
 	return 0;
 }
-- 
2.7.4