[PATCH net-next 4/4] tipc: block BH in TCP callbacks
From: Eric Dumazet <edumazet@google.com>
Date: 2016-05-18 00:44:28
Subsystem:
networking [general], the rest, tipc network layer · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Jon Maloy
TCP stack can now run from process context.
Use read_lock_bh(&sk->sk_callback_lock) variant to restore previous
assumption.
Fixes: 5413d1babe8f ("net: do not block BH while processing socket backlog")
Fixes: d41a69f1d390 ("tcp: make tcp_sendmsg() aware of socket backlog")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jon Maloy <redacted>
Cc: Ying Xue <redacted>
---
net/tipc/server.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/net/tipc/server.c b/net/tipc/server.c
index 7a0af2dc0406..272d20a795d5 100644
--- a/net/tipc/server.c
+++ b/net/tipc/server.c@@ -138,28 +138,28 @@ static void sock_data_ready(struct sock *sk) { struct tipc_conn *con; - read_lock(&sk->sk_callback_lock); + read_lock_bh(&sk->sk_callback_lock); con = sock2con(sk); if (con && test_bit(CF_CONNECTED, &con->flags)) { conn_get(con); if (!queue_work(con->server->rcv_wq, &con->rwork)) conn_put(con); } - read_unlock(&sk->sk_callback_lock); + read_unlock_bh(&sk->sk_callback_lock); } static void sock_write_space(struct sock *sk) { struct tipc_conn *con; - read_lock(&sk->sk_callback_lock); + read_lock_bh(&sk->sk_callback_lock); con = sock2con(sk); if (con && test_bit(CF_CONNECTED, &con->flags)) { conn_get(con); if (!queue_work(con->server->send_wq, &con->swork)) conn_put(con); } - read_unlock(&sk->sk_callback_lock); + read_unlock_bh(&sk->sk_callback_lock); } static void tipc_register_callbacks(struct socket *sock, struct tipc_conn *con)
--
2.8.0.rc3.226.g39d4020