Print out the infinite map received info.

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
---
 net/mptcp/subflow.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index b53b392dd280..250ec414df92 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -961,6 +961,7 @@ static enum mapping_status get_mapping_status(struct sock *ssk,
 
 	data_len = mpext->data_len;
 	if (data_len == 0) {
+		pr_debug("infinite mapping received");
 		MPTCP_INC_STATS(sock_net(ssk), MPTCP_MIB_INFINITEMAPRX);
 		subflow->map_data_len = 0;
 		return MAPPING_INVALID;
-- 
2.34.1