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path: root/drivers/crypto/hisilicon/hpre/hpre_crypto.c
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Diffstat (limited to 'drivers/crypto/hisilicon/hpre/hpre_crypto.c')
-rw-r--r--drivers/crypto/hisilicon/hpre/hpre_crypto.c25
1 files changed, 23 insertions, 2 deletions
diff --git a/drivers/crypto/hisilicon/hpre/hpre_crypto.c b/drivers/crypto/hisilicon/hpre/hpre_crypto.c
index 9a1c61be32..764532a6ca 100644
--- a/drivers/crypto/hisilicon/hpre/hpre_crypto.c
+++ b/drivers/crypto/hisilicon/hpre/hpre_crypto.c
@@ -57,6 +57,9 @@ struct hpre_ctx;
#define HPRE_DRV_ECDH_MASK_CAP BIT(2)
#define HPRE_DRV_X25519_MASK_CAP BIT(5)
+static DEFINE_MUTEX(hpre_algs_lock);
+static unsigned int hpre_available_devs;
+
typedef void (*hpre_cb)(struct hpre_ctx *ctx, void *sqe);
struct hpre_rsa_ctx {
@@ -2202,11 +2205,17 @@ static void hpre_unregister_x25519(struct hisi_qm *qm)
int hpre_algs_register(struct hisi_qm *qm)
{
- int ret;
+ int ret = 0;
+
+ mutex_lock(&hpre_algs_lock);
+ if (hpre_available_devs) {
+ hpre_available_devs++;
+ goto unlock;
+ }
ret = hpre_register_rsa(qm);
if (ret)
- return ret;
+ goto unlock;
ret = hpre_register_dh(qm);
if (ret)
@@ -2220,6 +2229,9 @@ int hpre_algs_register(struct hisi_qm *qm)
if (ret)
goto unreg_ecdh;
+ hpre_available_devs++;
+ mutex_unlock(&hpre_algs_lock);
+
return ret;
unreg_ecdh:
@@ -2228,13 +2240,22 @@ unreg_dh:
hpre_unregister_dh(qm);
unreg_rsa:
hpre_unregister_rsa(qm);
+unlock:
+ mutex_unlock(&hpre_algs_lock);
return ret;
}
void hpre_algs_unregister(struct hisi_qm *qm)
{
+ mutex_lock(&hpre_algs_lock);
+ if (--hpre_available_devs)
+ goto unlock;
+
hpre_unregister_x25519(qm);
hpre_unregister_ecdh(qm);
hpre_unregister_dh(qm);
hpre_unregister_rsa(qm);
+
+unlock:
+ mutex_unlock(&hpre_algs_lock);
}