crypto: talitos - stop using crypto_ahash::init

The function pointer crypto_ahash::init is an internal implementation
detail of the ahash API that exists to help it support both ahash and
shash algorithms.  With an upcoming refactoring of how the ahash API
supports shash algorithms, this field will be removed.

Some drivers are invoking crypto_ahash::init to call into their own
code, which is unnecessary and inefficient.  The talitos driver is one
of those drivers.  Make it just call its own code directly.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/talitos.c

@@ -2119,13 +2119,14 @@ static int ahash_finup(struct ahash_request *areq)
 
 static int ahash_digest(struct ahash_request *areq)
 {
-	struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
-	struct crypto_ahash *ahash = crypto_ahash_reqtfm(areq);
-
-	ahash->init(areq);
-	req_ctx->last = 1;
+	ahash_init(areq);
+	return ahash_finup(areq);
+}
 
-	return ahash_process_req(areq, areq->nbytes);
+static int ahash_digest_sha224_swinit(struct ahash_request *areq)
+{
+	ahash_init_sha224_swinit(areq);
+	return ahash_finup(areq);
 }
 
 static int ahash_export(struct ahash_request *areq, void *out)
@@ -3240,6 +3241,8 @@ static struct talitos_crypto_alg *talitos_alg_alloc(struct device *dev,
 		    (!strcmp(alg->cra_name, "sha224") ||
 		     !strcmp(alg->cra_name, "hmac(sha224)"))) {
 			t_alg->algt.alg.hash.init = ahash_init_sha224_swinit;
+			t_alg->algt.alg.hash.digest =
+				ahash_digest_sha224_swinit;
 			t_alg->algt.desc_hdr_template =
 					DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
 					DESC_HDR_SEL0_MDEUA |