To: Herbert Xu <herbert@gondor.apana.org.au>
From: Kamil Konieczny <k.konieczny@partner.samsung.com>
Subject: [PATCH] crypto: ux500/hash: Add empty export and import
Cc: "David S. Miller" <davem@davemloft.net>,
        Linus Walleij <linus.walleij@linaro.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
        linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
        Joakim Bech <joakim.bech@linaro.org>
Message-id: <a83d9022-b8bc-ea50-0707-5812f2306b8e@partner.samsung.com>
Date: Tue, 16 Jan 2018 17:32:18 +0100
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References: <CGME20180116163219eucas1p132fafc2db8cb9b3af1a1f22d8bf2fdaf@eucas1p1.samsung.com>
Sender: linux-kernel-owner@vger.kernel.org

Crypto framework will require async hash export/import, so add empty
functions to prevent OOPS.

Signed-off-by: Kamil Konieczny <k.konieczny@partner.samsung.com>
---
 drivers/crypto/ux500/hash/hash_core.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/crypto/ux500/hash/hash_core.c b/drivers/crypto/ux500/hash/hash_core.c
index 9acccad26928..2d0a677bcc76 100644
--- a/drivers/crypto/ux500/hash/hash_core.c
+++ b/drivers/crypto/ux500/hash/hash_core.c
@@ -1403,6 +1403,16 @@ static int ahash_sha256_digest(struct ahash_request *req)
 	return ret1 ? ret1 : ret2;
 }
 
+static int ahash_noimport(struct ahash_request *req, const void *in)
+{
+	return -ENOSYS;
+}
+
+static int ahash_noexport(struct ahash_request *req, void *out)
+{
+	return -ENOSYS;
+}
+
 static int hmac_sha1_init(struct ahash_request *req)
 {
 	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
@@ -1507,6 +1517,8 @@ static struct hash_algo_template hash_algs[] = {
 			.update = ahash_update,
 			.final = ahash_final,
 			.digest = ahash_sha1_digest,
+			.export = ahash_noexport,
+			.import = ahash_noimport,
 			.halg.digestsize = SHA1_DIGEST_SIZE,
 			.halg.statesize = sizeof(struct hash_ctx),
 			.halg.base = {
@@ -1529,6 +1541,8 @@ static struct hash_algo_template hash_algs[] = {
 			.update	= ahash_update,
 			.final = ahash_final,
 			.digest = ahash_sha256_digest,
+			.export = ahash_noexport,
+			.import = ahash_noimport,
 			.halg.digestsize = SHA256_DIGEST_SIZE,
 			.halg.statesize = sizeof(struct hash_ctx),
 			.halg.base = {
@@ -1553,6 +1567,8 @@ static struct hash_algo_template hash_algs[] = {
 			.final = ahash_final,
 			.digest = hmac_sha1_digest,
 			.setkey = hmac_sha1_setkey,
+			.export = ahash_noexport,
+			.import = ahash_noimport,
 			.halg.digestsize = SHA1_DIGEST_SIZE,
 			.halg.statesize = sizeof(struct hash_ctx),
 			.halg.base = {
@@ -1577,6 +1593,8 @@ static struct hash_algo_template hash_algs[] = {
 			.final = ahash_final,
 			.digest = hmac_sha256_digest,
 			.setkey = hmac_sha256_setkey,
+			.export = ahash_noexport,
+			.import = ahash_noimport,
 			.halg.digestsize = SHA256_DIGEST_SIZE,
 			.halg.statesize = sizeof(struct hash_ctx),
 			.halg.base = {
-- 
2.15.0