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From:   Eric Biggers <ebiggers@kernel.org>
To:     linux-crypto@vger.kernel.org
Cc:     Tom Lendacky <thomas.lendacky@amd.com>
Subject: [PATCH 05/20] crypto: ccp - use crypto_shash_tfm_digest()
Date:   Fri,  1 May 2020 22:31:07 -0700
Message-Id: <20200502053122.995648-6-ebiggers@kernel.org>
In-Reply-To: <20200502053122.995648-1-ebiggers@kernel.org>
References: <20200502053122.995648-1-ebiggers@kernel.org>
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From: Eric Biggers <ebiggers@google.com>

Instead of manually allocating a 'struct shash_desc' on the stack and
calling crypto_shash_digest(), switch to using the new helper function
crypto_shash_tfm_digest() which does this for us.

Cc: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 drivers/crypto/ccp/ccp-crypto-sha.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/crypto/ccp/ccp-crypto-sha.c b/drivers/crypto/ccp/ccp-crypto-sha.c
index 474e6f1a6a84ec..b0cc2bd73af804 100644
--- a/drivers/crypto/ccp/ccp-crypto-sha.c
+++ b/drivers/crypto/ccp/ccp-crypto-sha.c
@@ -272,9 +272,6 @@ static int ccp_sha_setkey(struct crypto_ahash *tfm, const u8 *key,
 {
 	struct ccp_ctx *ctx = crypto_tfm_ctx(crypto_ahash_tfm(tfm));
 	struct crypto_shash *shash = ctx->u.sha.hmac_tfm;
-
-	SHASH_DESC_ON_STACK(sdesc, shash);
-
 	unsigned int block_size = crypto_shash_blocksize(shash);
 	unsigned int digest_size = crypto_shash_digestsize(shash);
 	int i, ret;
@@ -289,10 +286,8 @@ static int ccp_sha_setkey(struct crypto_ahash *tfm, const u8 *key,
 
 	if (key_len > block_size) {
 		/* Must hash the input key */
-		sdesc->tfm = shash;
-
-		ret = crypto_shash_digest(sdesc, key, key_len,
-					  ctx->u.sha.key);
+		ret = crypto_shash_tfm_digest(shash, key, key_len,
+					      ctx->u.sha.key);
 		if (ret)
 			return -EINVAL;
 
-- 
2.26.2