Commit 62a9b19dce77 for kernel

commit 62a9b19dce77e72426f049fb99b9d1d032b9a8ea
Author: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Date:   Tue May 5 17:00:56 2026 +0200

    mptcp: pm: ADD_ADDR rtx: return early if no retrans

    No need to iterate over all subflows if there is no retransmission
    needed.

    Exit early in this case then.

    Fixes: 30549eebc4d8 ("mptcp: make ADD_ADDR retransmission timeout adaptive")
    Cc: stable@vger.kernel.org
    Reviewed-by: Mat Martineau <martineau@kernel.org>
    Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
    Link: https://patch.msgid.link/20260505-net-mptcp-pm-fixes-7-1-rc3-v1-8-fca8091060a4@kernel.org
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c
index 8a5dba7fe66e..4a6e5ab30d80 100644
--- a/net/mptcp/pm.c
+++ b/net/mptcp/pm.c
@@ -308,6 +308,9 @@ static unsigned int mptcp_adjust_add_addr_timeout(struct mptcp_sock *msk)
 	struct mptcp_subflow_context *subflow;
 	unsigned int max = 0, max_stale = 0;

+	if (!rto)
+		return 0;
+
 	mptcp_for_each_subflow(msk, subflow) {
 		struct sock *ssk = mptcp_subflow_tcp_sock(subflow);
 		struct inet_connection_sock *icsk = inet_csk(ssk);