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tipc: block BH in TCP callbacks 

TCP stack can now run from process context.

Use read_lock_bh(&sk->sk_callback_lock) variant to restore previous
assumption.

Fixes: 5413d1babe ("net: do not block BH while processing socket backlog")
Fixes: d41a69f1d3 ("tcp: make tcp_sendmsg() aware of socket backlog")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jon Maloy <jon.maloy@ericsson.com>
Cc: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2016-05-17 17:44:09 -07:00 committed by David S. Miller
parent 38036629cd
commit b91083a45e
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
net/tipc/server.c
View File

@ -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)