[PATCH -next] crypto: pkcs7: Use match_string() helper to simplify the code

[YueHaibing]

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

Signed-off-by: YueHaibing <yuehaib...@huawei.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 ce49820caa97..0b4d07aa8811 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;
 }
-- 
2.17.1