diff --git a/drivers/crypto/hisilicon/hpre/hpre_crypto.c b/drivers/crypto/hisilicon/hpre/hpre_crypto.c
index 09077abbf6ad..7894211b9972 100644
--- a/drivers/crypto/hisilicon/hpre/hpre_crypto.c
+++ b/drivers/crypto/hisilicon/hpre/hpre_crypto.c
@@ -720,7 +720,7 @@ static void hpre_dh_exit_tfm(struct crypto_kpp *tfm)
 
 static void hpre_rsa_drop_leading_zeros(const char **ptr, size_t *len)
 {
-	while (!**ptr && *len) {
+	while (*len && !**ptr) {
 		(*ptr)++;
 		(*len)--;
 	}