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From:   Iuliana Prodan <iuliana.prodan@nxp.com>
To:     Herbert Xu <herbert@gondor.apana.org.au>,
        Baolin Wang <baolin.wang@linaro.org>,
        Ard Biesheuvel <ard.biesheuvel@linaro.org>,
        Corentin Labbe <clabbe.montjoie@gmail.com>,
        Horia Geanta <horia.geanta@nxp.com>,
        Maxime Coquelin <mcoquelin.stm32@gmail.com>,
        Alexandre Torgue <alexandre.torgue@st.com>,
        Maxime Ripard <mripard@kernel.org>
Cc:     Aymen Sghaier <aymen.sghaier@nxp.com>,
        "David S. Miller" <davem@davemloft.net>,
        Silvano Di Ninno <silvano.dininno@nxp.com>,
        Franck Lenormand <franck.lenormand@nxp.com>,
        linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-imx <linux-imx@nxp.com>,
        Iuliana Prodan <iuliana.prodan@nxp.com>
Subject: [PATCH v6 1/3] crypto: algapi - create function to add request in front of queue
Date:   Tue, 28 Apr 2020 18:49:03 +0300
Message-Id: <1588088945-9067-2-git-send-email-iuliana.prodan@nxp.com>
In-Reply-To: <1588088945-9067-1-git-send-email-iuliana.prodan@nxp.com>
References: <1588088945-9067-1-git-send-email-iuliana.prodan@nxp.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Add crypto_enqueue_request_head function that enqueues a
request in front of queue.
This will be used in crypto-engine, on error path. In case a request
was not executed by hardware, enqueue it back in front of queue (to
keep the order of requests).

Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
---
 crypto/algapi.c         | 8 ++++++++
 include/crypto/algapi.h | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/crypto/algapi.c b/crypto/algapi.c
index f1e6cca..92abdf6 100644
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -914,6 +914,14 @@ int crypto_enqueue_request(struct crypto_queue *queue,
 }
 EXPORT_SYMBOL_GPL(crypto_enqueue_request);
 
+void crypto_enqueue_request_head(struct crypto_queue *queue,
+				 struct crypto_async_request *request)
+{
+	queue->qlen++;
+	list_add(&request->list, &queue->list);
+}
+EXPORT_SYMBOL_GPL(crypto_enqueue_request_head);
+
 struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue)
 {
 	struct list_head *request;
diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
index e115f92..00a9cf9 100644
--- a/include/crypto/algapi.h
+++ b/include/crypto/algapi.h
@@ -125,6 +125,8 @@ int crypto_inst_setname(struct crypto_instance *inst, const char *name,
 void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
 int crypto_enqueue_request(struct crypto_queue *queue,
 			   struct crypto_async_request *request);
+void crypto_enqueue_request_head(struct crypto_queue *queue,
+				 struct crypto_async_request *request);
 struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue);
 static inline unsigned int crypto_queue_len(struct crypto_queue *queue)
 {
-- 
2.1.0