diff --git a/drivers/crypto/sahara.c b/drivers/crypto/sahara.c
index b584dd086989..d6510e169c8e 100644
--- a/drivers/crypto/sahara.c
+++ b/drivers/crypto/sahara.c
@@ -676,6 +676,9 @@ static int sahara_aes_crypt(struct skcipher_request *req, unsigned long mode)
 	struct sahara_dev *dev = dev_ptr;
 	int err = 0;
 
+	if (!req->cryptlen)
+		return 0;
+
 	if (unlikely(ctx->keylen != AES_KEYSIZE_128))
 		return sahara_aes_fallback(req, mode);