crypto: algapi - create function to add request in front of queue

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>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/crypto/algapi.c b/crypto/algapi.c
index f1e6ccaff8539cb063ccebe36dca03394c7b6aec..92abdf675992c681ce5206a8c5783fc88495caa8 100644 (file)
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -914,6 +914,14 @@ out:
 }
 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 e115f9215ed57455b0a60ab060247c79e9d25b8a..00a9cf98debe2c80c535667e5a8adc92662d1770 100644 (file)
--- 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)
 {