linux-kernel - [PATCH] crypto: mxs-dcp: Add empty hash export and import

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Date:   Tue, 16 Jan 2018 17:16:40 +0100
From:   Kamil Konieczny <k.konieczny@...tner.samsung.com>
To:     Herbert Xu <herbert@...dor.apana.org.au>
Cc:     Marek Vasut <marex@...x.de>,
        "David S. Miller" <davem@...emloft.net>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] crypto: mxs-dcp: Add empty hash export and import

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

Signed-off-by: Kamil Konieczny <k.konieczny@...tner.samsung.com>
---
 drivers/crypto/mxs-dcp.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/crypto/mxs-dcp.c b/drivers/crypto/mxs-dcp.c
index 764be3e6933c..a10c418d4e5c 100644
--- a/drivers/crypto/mxs-dcp.c
+++ b/drivers/crypto/mxs-dcp.c
@@ -759,6 +759,16 @@ static int dcp_sha_digest(struct ahash_request *req)
 	return dcp_sha_finup(req);
 }
 
+static int dcp_sha_noimport(struct ahash_request *req, const void *in)
+{
+	return -ENOSYS;
+}
+
+static int dcp_sha_noexport(struct ahash_request *req, void *out)
+{
+	return -ENOSYS;
+}
+
 static int dcp_sha_cra_init(struct crypto_tfm *tfm)
 {
 	crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
@@ -829,6 +839,8 @@ static struct ahash_alg dcp_sha1_alg = {
 	.final	= dcp_sha_final,
 	.finup	= dcp_sha_finup,
 	.digest	= dcp_sha_digest,
+	.import = dcp_sha_noimport,
+	.export = dcp_sha_noexport,
 	.halg	= {
 		.digestsize	= SHA1_DIGEST_SIZE,
 		.base		= {
@@ -853,6 +865,8 @@ static struct ahash_alg dcp_sha256_alg = {
 	.final	= dcp_sha_final,
 	.finup	= dcp_sha_finup,
 	.digest	= dcp_sha_digest,
+	.import = dcp_sha_noimport,
+	.export = dcp_sha_noexport,
 	.halg	= {
 		.digestsize	= SHA256_DIGEST_SIZE,
 		.base		= {
-- 
2.15.0