[PATCH 4/9] crypto: engine: permit to choose queue length

[Corentin Labbe <clabbe.montjoie@xxxxxxxxx>]

This patch adds a new function which permit to choose the crypto engine
queue length.

Signed-off-by: Corentin Labbe <clabbe.montjoie@xxxxxxxxx>
---
 crypto/crypto_engine.c  | 23 ++++++++++++++++++++---
 include/crypto/engine.h |  2 ++
 2 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/crypto/crypto_engine.c b/crypto/crypto_engine.c
index c21867106aa4..5bcb1e740fd9 100644
--- a/crypto/crypto_engine.c
+++ b/crypto/crypto_engine.c
@@ -365,15 +365,17 @@ int crypto_engine_stop(struct crypto_engine *engine)
 EXPORT_SYMBOL_GPL(crypto_engine_stop);
 
 /**
- * crypto_engine_alloc_init - allocate crypto hardware engine structure and
+ * crypto_engine_alloc_init2 - allocate crypto hardware engine structure and
  * initialize it.
  * @dev: the device attached with one hardware engine
  * @rt: whether this queue is set to run as a realtime task
+ * @qlen: The size of the crypto queue
  *
  * This must be called from context that can sleep.
  * Return: the crypto engine structure on success, else NULL.
  */
-struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt)
+struct crypto_engine *crypto_engine_alloc_init2(struct device *dev, bool rt,
+						int qlen)
 {
 	struct sched_param param = { .sched_priority = MAX_RT_PRIO / 2 };
 	struct crypto_engine *engine;
@@ -393,7 +395,7 @@ struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt)
 	snprintf(engine->name, sizeof(engine->name),
 		 "%s-engine", dev_name(dev));
 
-	crypto_init_queue(&engine->queue, CRYPTO_ENGINE_MAX_QLEN);
+	crypto_init_queue(&engine->queue, qlen);
 	spin_lock_init(&engine->queue_lock);
 
 	engine->kworker = kthread_create_worker(0, "%s", engine->name);
@@ -410,6 +412,21 @@ struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt)
 
 	return engine;
 }
+EXPORT_SYMBOL_GPL(crypto_engine_alloc_init2);
+
+/**
+ * crypto_engine_alloc_init - allocate crypto hardware engine structure and
+ * initialize it.
+ * @dev: the device attached with one hardware engine
+ * @rt: whether this queue is set to run as a realtime task
+ *
+ * This must be called from context that can sleep.
+ * Return: the crypto engine structure on success, else NULL.
+ */
+struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt)
+{
+	return crypto_engine_alloc_init2(dev, rt, CRYPTO_ENGINE_MAX_QLEN);
+}
 EXPORT_SYMBOL_GPL(crypto_engine_alloc_init);
 
 /**
diff --git a/include/crypto/engine.h b/include/crypto/engine.h
index d77080227beb..03d9f9ec1cea 100644
--- a/include/crypto/engine.h
+++ b/include/crypto/engine.h
@@ -96,6 +96,8 @@ void crypto_finalize_skcipher_request(struct crypto_engine *engine,
 int crypto_engine_start(struct crypto_engine *engine);
 int crypto_engine_stop(struct crypto_engine *engine);
 struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt);
+struct crypto_engine *crypto_engine_alloc_init2(struct device *dev, bool rt,
+						int qlen);
 int crypto_engine_exit(struct crypto_engine *engine);
 
 #endif /* _CRYPTO_ENGINE_H */
-- 
2.24.1