netdev - [PATCH net-next 4/8] mptcp: move subflow close loop after sk close check

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Date:   Fri, 12 Feb 2021 15:59:57 -0800
From:   Mat Martineau <mathew.j.martineau@...ux.intel.com>
To:     netdev@...r.kernel.org
Cc:     Florian Westphal <fw@...len.de>, davem@...emloft.net,
        kuba@...nel.org, mptcp@...ts.01.org, matthieu.baerts@...sares.net,
        Mat Martineau <mathew.j.martineau@...ux.intel.com>
Subject: [PATCH net-next 4/8] mptcp: move subflow close loop after sk close check

From: Florian Westphal <fw@...len.de>

In case mptcp socket is already dead the entire mptcp socket
will be freed. We can avoid the close check in this case.

Signed-off-by: Florian Westphal <fw@...len.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@...ux.intel.com>
---
 net/mptcp/protocol.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 267c5521692d..1b8be2bf6b43 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -2246,9 +2246,6 @@ static void mptcp_worker(struct work_struct *work)
 
 	mptcp_check_fastclose(msk);
 
-	if (test_and_clear_bit(MPTCP_WORK_CLOSE_SUBFLOW, &msk->flags))
-		__mptcp_close_subflow(msk);
-
 	if (msk->pm.status)
 		mptcp_pm_nl_work(msk);
 
@@ -2270,6 +2267,9 @@ static void mptcp_worker(struct work_struct *work)
 		goto unlock;
 	}
 
+	if (test_and_clear_bit(MPTCP_WORK_CLOSE_SUBFLOW, &msk->flags))
+		__mptcp_close_subflow(msk);
+
 	if (!test_and_clear_bit(MPTCP_WORK_RTX, &msk->flags))
 		goto unlock;
 
-- 
2.30.1