From: Paolo Abeni <pabeni@redhat.com>
Date: Sat, 27 Sep 2025 09:40:41 +0000 (+0200)
Subject: mptcp: remove unneeded mptcp_move_skb()
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=c4ebc4ee4e751c6430604c52344d932bf1fde379;p=users%2Fhch%2Fmisc.git

mptcp: remove unneeded mptcp_move_skb()

Since commit b7535cfed223 ("mptcp: drop legacy code around RX EOF"),
sk_shutdown can't change during the main recvmsg loop, we can drop
the related race breaker.

Reviewed-by: Geliang Tang <geliang@kernel.org>
Tested-by: Geliang Tang <geliang@kernel.org>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20250927-net-next-mptcp-rcv-path-imp-v1-5-5da266aa9c1a@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---

diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 832782e23740..26fbd9f6a3f7 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -2207,14 +2207,8 @@ static int mptcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
 				break;
 			}
 
-			if (sk->sk_shutdown & RCV_SHUTDOWN) {
-				/* race breaker: the shutdown could be after the
-				 * previous receive queue check
-				 */
-				if (__mptcp_move_skbs(sk))
-					continue;
+			if (sk->sk_shutdown & RCV_SHUTDOWN)
 				break;
-			}
 
 			if (sk->sk_state == TCP_CLOSE) {
 				copied = -ENOTCONN;