From: Paolo Abeni <pabeni@xxxxxxxxxx>
[ Upstream commit 65a569b03ca832ebc93ce45a7466137e2bb62254 ]
The mptcp release callback checks several flags in atomic
context, but only MPTCP_CLEAN_UNA can be up frequently.
Reorganize the code to avoid multiple conditionals in the
most common scenarios.
Additional clarify a related comment.
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Mat Martineau <mathew.j.martineau@xxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/mptcp/protocol.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 0cbea3b6d0a4..2a9335ce5df1 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -3092,15 +3092,17 @@ static void mptcp_release_cb(struct sock *sk)
spin_lock_bh(&sk->sk_lock.slock);
}
- /* be sure to set the current sk state before tacking actions
- * depending on sk_state
- */
- if (__test_and_clear_bit(MPTCP_CONNECTED, &msk->cb_flags))
- __mptcp_set_connected(sk);
if (__test_and_clear_bit(MPTCP_CLEAN_UNA, &msk->cb_flags))
__mptcp_clean_una_wakeup(sk);
- if (__test_and_clear_bit(MPTCP_ERROR_REPORT, &msk->cb_flags))
- __mptcp_error_report(sk);
+ if (unlikely(&msk->cb_flags)) {
+ /* be sure to set the current sk state before tacking actions
+ * depending on sk_state, that is processing MPTCP_ERROR_REPORT
+ */
+ if (__test_and_clear_bit(MPTCP_CONNECTED, &msk->cb_flags))
+ __mptcp_set_connected(sk);
+ if (__test_and_clear_bit(MPTCP_ERROR_REPORT, &msk->cb_flags))
+ __mptcp_error_report(sk);
+ }
__mptcp_update_rmem(sk);
}
--
2.35.1
