crypto: hisilicon/qm - fix the process of register algorithms to crypto

When the devices are removed or not existing, the corresponding algorithms
which are registered by 'hisi-zip' driver can't be used.

Move 'hisi_zip_register_to_crypto' from 'hisi_zip_init' to
'hisi_zip_probe'. The algorithms will be registered to crypto only when
there is device bind on the driver. And when the devices are removed,
the algorithms will be unregistered.

In the previous process, the function 'xxx_register_to_crypto' need a lock
and a static variable to judge if the registration is the first time.
Move this action into the function 'hisi_qm_alg_register'. Each device
will call 'hisi_qm_alg_register' to add itself to qm list in probe process
and registering algs when the qm list is empty.

Signed-off-by: Yang Shen <shenyang39@huawei.com>
Reviewed-by: Zhou Wang <wangzhou1@hisilicon.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 11 insertions, 25 deletions

diff --git a/drivers/crypto/hisilicon/hpre/hpre_crypto.c b/drivers/crypto/hisilicon/hpre/hpre_crypto.c
index 7b5cb27d473d..d68599218fd9 100644
--- a/drivers/crypto/hisilicon/hpre/hpre_crypto.c
+++ b/drivers/crypto/hisilicon/hpre/hpre_crypto.c
@@ -98,9 +98,6 @@ struct hpre_asym_request {
 	struct timespec64 req_time;
 };
 
-static DEFINE_MUTEX(hpre_alg_lock);
-static unsigned int hpre_active_devs;
-
 static int hpre_alloc_req_id(struct hpre_ctx *ctx)
 {
 	unsigned long flags;
@@ -1160,36 +1157,25 @@ static struct kpp_alg dh = {
 
 int hpre_algs_register(void)
 {
-	int ret = 0;
-
-	mutex_lock(&hpre_alg_lock);
-	if (++hpre_active_devs == 1) {
-		rsa.base.cra_flags = 0;
-		ret = crypto_register_akcipher(&rsa);
-		if (ret)
-			goto unlock;
+	int ret;
+
+	rsa.base.cra_flags = 0;
+	ret = crypto_register_akcipher(&rsa);
+	if (ret)
+		return ret;
 #ifdef CONFIG_CRYPTO_DH
-		ret = crypto_register_kpp(&dh);
-		if (ret) {
-			crypto_unregister_akcipher(&rsa);
-			goto unlock;
-		}
+	ret = crypto_register_kpp(&dh);
+	if (ret)
+		crypto_unregister_akcipher(&rsa);
 #endif
-	}
 
-unlock:
-	mutex_unlock(&hpre_alg_lock);
 	return ret;
 }
 
 void hpre_algs_unregister(void)
 {
-	mutex_lock(&hpre_alg_lock);
-	if (--hpre_active_devs == 0) {
-		crypto_unregister_akcipher(&rsa);
+	crypto_unregister_akcipher(&rsa);
 #ifdef CONFIG_CRYPTO_DH
-		crypto_unregister_kpp(&dh);
+	crypto_unregister_kpp(&dh);
 #endif
-	}
-	mutex_unlock(&hpre_alg_lock);
 }