Replace the sequence of crypto_get_default_rng(),
crypto_rng_get_bytes(), and crypto_put_default_rng() with the equivalent
helper function crypto_stdrng_get_bytes().

Signed-off-by: Eric Biggers <ebiggers@kernel.org>
---
 drivers/crypto/hisilicon/hpre/hpre_crypto.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/drivers/crypto/hisilicon/hpre/hpre_crypto.c b/drivers/crypto/hisilicon/hpre/hpre_crypto.c
index 839c1f677143..09077abbf6ad 100644
--- a/drivers/crypto/hisilicon/hpre/hpre_crypto.c
+++ b/drivers/crypto/hisilicon/hpre/hpre_crypto.c
@@ -1325,21 +1325,13 @@ static bool hpre_key_is_zero(const char *key, unsigned short key_sz)
 static int ecdh_gen_privkey(struct hpre_ctx *ctx, struct ecdh *params)
 {
 	struct device *dev = ctx->dev;
 	int ret;
 
-	ret = crypto_get_default_rng();
-	if (ret) {
-		dev_err(dev, "failed to get default rng, ret = %d!\n", ret);
-		return ret;
-	}
-
-	ret = crypto_rng_get_bytes(crypto_default_rng, (u8 *)params->key,
-				   params->key_size);
-	crypto_put_default_rng();
+	ret = crypto_stdrng_get_bytes(params->key, params->key_size);
 	if (ret)
-		dev_err(dev, "failed to get rng, ret = %d!\n", ret);
+		dev_err(dev, "failed to get random bytes, ret = %d!\n", ret);
 
 	return ret;
 }
 
 static int hpre_ecdh_set_secret(struct crypto_kpp *tfm, const void *buf,
-- 
2.53.0