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-rw-r--r--net/mptcp/protocol.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 1a408395e78f..ade648c3512b 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -1515,15 +1515,19 @@ void __mptcp_push_pending(struct sock *sk, unsigned int flags)
mptcp_flush_join_list(msk);
ssk = mptcp_subflow_get_send(msk);
- /* try to keep the subflow socket lock across
- * consecutive xmit on the same socket
+ /* First check. If the ssk has changed since
+ * the last round, release prev_ssk
*/
if (ssk != prev_ssk && prev_ssk)
mptcp_push_release(sk, prev_ssk, &info);
if (!ssk)
goto out;
- if (ssk != prev_ssk || !prev_ssk)
+ /* Need to lock the new subflow only if different
+ * from the previous one, otherwise we are still
+ * helding the relevant lock
+ */
+ if (ssk != prev_ssk)
lock_sock(ssk);
/* keep it simple and always provide a new skb for the