diff --git a/drivers/crypto/hisilicon/trng/trng.c b/drivers/crypto/hisilicon/trng/trng.c
index 829f2caf0f67fd675b43b980fa0db4ab22b79d68..97e500db0a8259b27f7186453f9153a55ad805d8 100644
--- a/drivers/crypto/hisilicon/trng/trng.c
+++ b/drivers/crypto/hisilicon/trng/trng.c
@@ -185,7 +185,7 @@ static int hisi_trng_read(struct hwrng *rng, void *buf, size_t max, bool wait)
 	struct hisi_trng *trng;
 	int currsize = 0;
 	u32 val = 0;
-	u32 ret;
+	int ret;
 
 	trng = container_of(rng, struct hisi_trng, rng);