[PATCH 2/2] crypto: shash - fold shash_digest_unaligned() into crypto_shash_digest()

[Eric Biggers <ebiggers@kernel.org>]

From: Eric Biggers <ebiggers@google.com>

Fold shash_digest_unaligned() into its only remaining caller.  Also,
avoid a redundant check of CRYPTO_TFM_NEED_KEY by replacing the call to
crypto_shash_init() with shash->init(desc).  Finally, replace
shash_update_unaligned() + shash_final_unaligned() with
shash_finup_unaligned() which does exactly that.

Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 crypto/shash.c | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/crypto/shash.c b/crypto/shash.c
index d99dc2f94c65f..15fee57cca8ef 100644
--- a/crypto/shash.c
+++ b/crypto/shash.c
@@ -218,28 +218,20 @@ int crypto_shash_finup(struct shash_desc *desc, const u8 *data,
 	if (((unsigned long)data | (unsigned long)out) & alignmask)
 		err = shash_finup_unaligned(desc, data, len, out);
 	else
 		err = shash->finup(desc, data, len, out);
 
 
 	return crypto_shash_errstat(shash, err);
 }
 EXPORT_SYMBOL_GPL(crypto_shash_finup);
 
-static int shash_digest_unaligned(struct shash_desc *desc, const u8 *data,
-				  unsigned int len, u8 *out)
-{
-	return crypto_shash_init(desc) ?:
-	       shash_update_unaligned(desc, data, len) ?:
-	       shash_final_unaligned(desc, out);
-}
-
 static int shash_default_digest(struct shash_desc *desc, const u8 *data,
 				unsigned int len, u8 *out)
 {
 	struct shash_alg *shash = crypto_shash_alg(desc->tfm);
 
 	return shash->init(desc) ?:
 	       shash->finup(desc, data, len, out);
 }
 
 int crypto_shash_digest(struct shash_desc *desc, const u8 *data,
@@ -253,21 +245,22 @@ int crypto_shash_digest(struct shash_desc *desc, const u8 *data,
 	if (IS_ENABLED(CONFIG_CRYPTO_STATS)) {
 		struct crypto_istat_hash *istat = shash_get_stat(shash);
 
 		atomic64_inc(&istat->hash_cnt);
 		atomic64_add(len, &istat->hash_tlen);
 	}
 
 	if (crypto_shash_get_flags(tfm) & CRYPTO_TFM_NEED_KEY)
 		err = -ENOKEY;
 	else if (((unsigned long)data | (unsigned long)out) & alignmask)
-		err = shash_digest_unaligned(desc, data, len, out);
+		err = shash->init(desc) ?:
+		      shash_finup_unaligned(desc, data, len, out);
 	else
 		err = shash->digest(desc, data, len, out);
 
 	return crypto_shash_errstat(shash, err);
 }
 EXPORT_SYMBOL_GPL(crypto_shash_digest);
 
 int crypto_shash_tfm_digest(struct crypto_shash *tfm, const u8 *data,
 			    unsigned int len, u8 *out)
 {
-- 
2.42.0