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Subject[PATCH v5 1/3] crypto: algapi - create function to add request in front of queue
Date
Add crypto_enqueue_request_head function that enqueues a
MAY_BACKLOG 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 | 11 +++++++++++
include/crypto/algapi.h | 2 ++
2 files changed, 13 insertions(+)

diff --git a/crypto/algapi.c b/crypto/algapi.c
index 69605e21af92..a8732e8e7843 100644
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -904,6 +904,17 @@ 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)
+{
+ /* only backlog requests can be enqueued */
+ BUG_ON(!(request->flags & CRYPTO_TFM_REQ_MAY_BACKLOG));
+
+ 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 e115f9215ed5..00a9cf98debe 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)
{
--
2.17.1
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