From: Geliang Tang <tanggeliang@kylinos.cn>

MPTCP TLS hardware offload is not yet implemented. Return -EOPNOTSUPP
when attempting to enable device offload on MPTCP sockets.

Co-developed-by: Gang Yan <yangang@kylinos.cn>
Signed-off-by: Gang Yan <yangang@kylinos.cn>
Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
---
 net/tls/tls_device.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c
index 99c8eff9783e..6744c2494740 100644
--- a/net/tls/tls_device.c
+++ b/net/tls/tls_device.c
@@ -1074,6 +1074,9 @@ int tls_set_device_offload(struct sock *sk)
 	ctx = tls_get_ctx(sk);
 	prot = &ctx->prot_info;
 
+	if (sk->sk_protocol == IPPROTO_MPTCP)
+		return -EOPNOTSUPP;
+
 	if (ctx->priv_ctx_tx)
 		return -EEXIST;
 
@@ -1196,6 +1199,9 @@ int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx)
 	struct net_device *netdev;
 	int rc = 0;
 
+	if (sk->sk_protocol == IPPROTO_MPTCP)
+		return -EOPNOTSUPP;
+
 	if (ctx->crypto_recv.info.version != TLS_1_2_VERSION)
 		return -EOPNOTSUPP;
 
-- 
2.53.0