crypto: hisilicon/sec - fix for sgl unmmap problem

When sec_aead_mac_init returns an error code, sec_cipher_map
will exit abnormally, the hardware sgl should be unmmaped.

Signed-off-by: Wenkai Lin <linwenkai6@hisilicon.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/hisilicon/sec2/sec_crypto.c

@@ -1011,6 +1011,7 @@ static int sec_cipher_map(struct sec_ctx *ctx, struct sec_req *req,
 		ret = sec_aead_mac_init(a_req);
 		if (unlikely(ret)) {
 			dev_err(dev, "fail to init mac data for ICV!\n");
+			hisi_acc_sg_buf_unmap(dev, src, req->in);
 			return ret;
 		}
 	}