To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
        linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
From: Kamil Konieczny <k.konieczny@partner.samsung.com>
Subject: [PATCH] crypto: n2_core: Add empty hash export and import
Message-id: <d46bfcf3-8c75-c7cd-ed6a-98ae8d9cdcaf@partner.samsung.com>
Date: Tue, 16 Jan 2018 17:18:43 +0100
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References: <CGME20180116161844eucas1p27634e8860ca620b45224fa9efe491e2c@eucas1p2.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/n2_core.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/crypto/n2_core.c b/drivers/crypto/n2_core.c
index 662e709812cc..80e9c842aad4 100644
--- a/drivers/crypto/n2_core.c
+++ b/drivers/crypto/n2_core.c
@@ -359,6 +359,16 @@ static int n2_hash_async_finup(struct ahash_request *req)
 	return crypto_ahash_finup(&rctx->fallback_req);
 }
 
+static int n2_hash_async_noimport(struct ahash_request *req, const void *in)
+{
+	return -ENOSYS;
+}
+
+static int n2_hash_async_noexport(struct ahash_request *req, void *out)
+{
+	return -ENOSYS;
+}
+
 static int n2_hash_cra_init(struct crypto_tfm *tfm)
 {
 	const char *fallback_driver_name = crypto_tfm_alg_name(tfm);
@@ -1467,6 +1477,8 @@ static int __n2_register_one_ahash(const struct n2_hash_tmpl *tmpl)
 	ahash->final = n2_hash_async_final;
 	ahash->finup = n2_hash_async_finup;
 	ahash->digest = n2_hash_async_digest;
+	ahash->export = n2_hash_async_noexport;
+	ahash->import = n2_hash_async_noimport;
 
 	halg = &ahash->halg;
 	halg->digestsize = tmpl->digest_size;
-- 
2.15.0