diff --git a/drivers/crypto/intel/ixp4xx/ixp4xx_crypto.c b/drivers/crypto/intel/ixp4xx/ixp4xx_crypto.c
index fdda04672454..33e8e887a415 100644
--- a/drivers/crypto/intel/ixp4xx/ixp4xx_crypto.c
+++ b/drivers/crypto/intel/ixp4xx/ixp4xx_crypto.c
@@ -707,8 +707,7 @@ static int register_chain_var(struct crypto_tfm *tfm, u8 xpad, u32 target,
 		return -EAGAIN;
 	}
 
-	memcpy(pad, key, key_len);
-	memset(pad + key_len, 0, HMAC_PAD_BLOCKLEN - key_len);
+	memcpy_and_pad(pad, HMAC_PAD_BLOCKLEN, key, key_len, 0);
 	for (i = 0; i < HMAC_PAD_BLOCKLEN; i++)
 		pad[i] ^= xpad;