Bluetooth: Free the l2cap channel list only when refcount is zero

Move the l2cap channel list chan->global_l under the refcnt
protection and free it based on the refcnt.

Signed-off-by: Jaganath Kanakkassery <jaganath.k@samsung.com>
Signed-off-by: Syam Sidhardhan <s.syam@samsung.com>
Reviewed-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h
index a1eb678..d206296 100644 (file)
--- a/include/net/bluetooth/l2cap.h
+++ b/include/net/bluetooth/l2cap.h
@@ -759,7 +759,6 @@ int l2cap_add_scid(struct l2cap_chan *chan,  __u16 scid);
 
 struct l2cap_chan *l2cap_chan_create(void);
 void l2cap_chan_close(struct l2cap_chan *chan, int reason);
-void l2cap_chan_destroy(struct l2cap_chan *chan);
 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
                       bdaddr_t *dst, u8 dst_type);
 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len,

diff --git a/net/bluetooth/a2mp.c b/net/bluetooth/a2mp.c
index 79af661..0760d1f 100644 (file)
--- a/net/bluetooth/a2mp.c
+++ b/net/bluetooth/a2mp.c
@@ -416,7 +416,7 @@ static int a2mp_chan_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb)
 
 static void a2mp_chan_close_cb(struct l2cap_chan *chan)
 {
-       l2cap_chan_destroy(chan);
+       l2cap_chan_put(chan);
 }
 
 static void a2mp_chan_state_change_cb(struct l2cap_chan *chan, int state)

diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 79923d8..9f8b29e 100644 (file)
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -416,13 +416,15 @@ struct l2cap_chan *l2cap_chan_create(void)
        return chan;
 }
 
-void l2cap_chan_destroy(struct l2cap_chan *chan)
+static void l2cap_chan_destroy(struct l2cap_chan *chan)
 {
+       BT_DBG("chan %p", chan);
+
        write_lock(&chan_list_lock);
        list_del(&chan->global_l);
        write_unlock(&chan_list_lock);
 
-       l2cap_chan_put(chan);
+       kfree(chan);
 }
 
 void l2cap_chan_hold(struct l2cap_chan *c)
@@ -437,7 +439,7 @@ void l2cap_chan_put(struct l2cap_chan *c)
        BT_DBG("chan %p orig refcnt %d", c, atomic_read(&c->refcnt));
 
        if (atomic_dec_and_test(&c->refcnt))
-               kfree(c);
+               l2cap_chan_destroy(c);
 }
 
 void l2cap_chan_set_defaults(struct l2cap_chan *chan)

diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index a4bb27e..79350d1 100644 (file)
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -823,7 +823,7 @@ static void l2cap_sock_kill(struct sock *sk)
 
        /* Kill poor orphan */
 
-       l2cap_chan_destroy(l2cap_pi(sk)->chan);
+       l2cap_chan_put(l2cap_pi(sk)->chan);
        sock_set_flag(sk, SOCK_DEAD);
        sock_put(sk);
 }