l2cap_get_sock_by_psm() was the only user of this function, so I merged
both into l2cap_get_sock_by_psm(). The socket lock now should be hold
outside of l2cap_get_sock_by_psm() once we hold and release it inside the
same function now.
Signed-off-by: Gustavo F. Padovan <padovan@xxxxxxxxxxxxxx>
---
net/bluetooth/l2cap.c | 22 +++++++++-------------
1 files changed, 9 insertions(+), 13 deletions(-)
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 3d48867..27199bc 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -746,11 +746,13 @@ found:
/* Find socket with psm and source bdaddr.
* Returns closest match.
*/
-static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src)
+static struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src)
{
struct sock *sk = NULL, *sk1 = NULL;
struct hlist_node *node;
+ read_lock(&l2cap_sk_list.lock);
+
sk_for_each(sk, node, &l2cap_sk_list.head) {
if (state && sk->sk_state != state)
continue;
@@ -765,20 +767,10 @@ static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src
sk1 = sk;
}
}
- return node ? sk : sk1;
-}
-/* Find socket with given address (psm, src).
- * Returns locked socket */
-static inline struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src)
-{
- struct sock *s;
- read_lock(&l2cap_sk_list.lock);
- s = __l2cap_get_sock_by_psm(state, psm, src);
- if (s)
- bh_lock_sock(s);
read_unlock(&l2cap_sk_list.lock);
- return s;
+
+ return node ? sk : sk1;
}
static void l2cap_sock_destruct(struct sock *sk)
@@ -2921,6 +2913,8 @@ static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hd
goto sendresp;
}
+ bh_lock_sock(parent);
+
/* Check if the ACL is secure enough (if not SDP) */
if (psm != cpu_to_le16(0x0001) &&
!hci_conn_check_link_mode(conn->hcon)) {
@@ -4425,6 +4419,8 @@ static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, str
if (!sk)
goto drop;
+ bh_lock_sock(sk);
+
BT_DBG("sk %p, len %d", sk, skb->len);
if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED)
--
1.7.3.1
--
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