From 45054dc1bf2367ccb0e7c0486037907cd9395f8b Mon Sep 17 00:00:00 2001 From: Dave Young Date: Sun, 18 Oct 2009 20:28:30 +0000 Subject: [PATCH] bluetooth: static lock key fix When shutdown ppp connection, lockdep waring about non-static key will happen, it is caused by the lock is not initialized properly at that time. Fix with tuning the lock/skb_queue_head init order [ 94.339261] INFO: trying to register non-static key. [ 94.342509] the code is fine but needs lockdep annotation. [ 94.342509] turning off the locking correctness validator. [ 94.342509] Pid: 0, comm: swapper Not tainted 2.6.31-mm1 #2 [ 94.342509] Call Trace: [ 94.342509] [] register_lock_class+0x58/0x241 [ 94.342509] [] ? __lock_acquire+0xb57/0xb73 [ 94.342509] [] __lock_acquire+0xac/0xb73 [ 94.342509] [] ? lock_release_non_nested+0x17b/0x1de [ 94.342509] [] lock_acquire+0x67/0x84 [ 94.342509] [] ? skb_dequeue+0x15/0x41 [ 94.342509] [] _spin_lock_irqsave+0x2f/0x3f [ 94.342509] [] ? skb_dequeue+0x15/0x41 [ 94.342509] [] skb_dequeue+0x15/0x41 [ 94.342509] [] ? _read_unlock+0x1d/0x20 [ 94.342509] [] skb_queue_purge+0x14/0x1b [ 94.342509] [] l2cap_recv_frame+0xea1/0x115a [l2cap] [ 94.342509] [] ? __lock_acquire+0xb57/0xb73 [ 94.342509] [] ? mark_lock+0x1e/0x1c7 [ 94.342509] [] ? hci_rx_task+0xd2/0x1bc [bluetooth] [ 94.342509] [] l2cap_recv_acldata+0xb1/0x1c6 [l2cap] [ 94.342509] [] hci_rx_task+0x106/0x1bc [bluetooth] [ 94.342509] [] ? l2cap_recv_acldata+0x0/0x1c6 [l2cap] [ 94.342509] [] tasklet_action+0x69/0xc1 [ 94.342509] [] __do_softirq+0x94/0x11e [ 94.342509] [] do_softirq+0x36/0x5a [ 94.342509] [] irq_exit+0x35/0x68 [ 94.342509] [] do_IRQ+0x72/0x89 [ 94.342509] [] common_interrupt+0x2e/0x34 [ 94.342509] [] ? pm_qos_add_requirement+0x63/0x9d [ 94.342509] [] ? acpi_idle_enter_bm+0x209/0x238 [ 94.342509] [] cpuidle_idle_call+0x5c/0x94 [ 94.342509] [] cpu_idle+0x4e/0x6f [ 94.342509] [] rest_init+0x53/0x55 [ 94.342509] [] start_kernel+0x2f0/0x2f5 [ 94.342509] [] i386_start_kernel+0x91/0x96 Reported-by: Oliver Hartkopp Signed-off-by: Dave Young Tested-by: Oliver Hartkopp Signed-off-by: David S. Miller --- net/bluetooth/l2cap.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c index 555d9da1869b..77e9fb130adb 100644 --- a/net/bluetooth/l2cap.c +++ b/net/bluetooth/l2cap.c @@ -555,12 +555,12 @@ static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) conn->feat_mask = 0; - setup_timer(&conn->info_timer, l2cap_info_timeout, - (unsigned long) conn); - spin_lock_init(&conn->lock); rwlock_init(&conn->chan_list.lock); + setup_timer(&conn->info_timer, l2cap_info_timeout, + (unsigned long) conn); + conn->disc_reason = 0x13; return conn; @@ -783,6 +783,9 @@ static void l2cap_sock_init(struct sock *sk, struct sock *parent) /* Default config options */ pi->conf_len = 0; pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; + skb_queue_head_init(TX_QUEUE(sk)); + skb_queue_head_init(SREJ_QUEUE(sk)); + INIT_LIST_HEAD(SREJ_LIST(sk)); } static struct proto l2cap_proto = {