The following commit has been merged in the linux branch: commit 45054dc1bf2367ccb0e7c0486037907cd9395f8b Author: Dave Young hidave.darkstar@gmail.com Date: Sun Oct 18 20:28:30 2009 +0000

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] [<c0248fbe>] register_lock_class+0x58/0x241 [ 94.342509] [<c024b5df>] ? __lock_acquire+0xb57/0xb73 [ 94.342509] [<c024ab34>] __lock_acquire+0xac/0xb73 [ 94.342509] [<c024b7fa>] ? lock_release_non_nested+0x17b/0x1de [ 94.342509] [<c024b662>] lock_acquire+0x67/0x84 [ 94.342509] [<c04cd1eb>] ? skb_dequeue+0x15/0x41 [ 94.342509] [<c054a857>] _spin_lock_irqsave+0x2f/0x3f [ 94.342509] [<c04cd1eb>] ? skb_dequeue+0x15/0x41 [ 94.342509] [<c04cd1eb>] skb_dequeue+0x15/0x41 [ 94.342509] [<c054a648>] ? _read_unlock+0x1d/0x20 [ 94.342509] [<c04cd641>] skb_queue_purge+0x14/0x1b [ 94.342509] [<fab94fdc>] l2cap_recv_frame+0xea1/0x115a [l2cap] [ 94.342509] [<c024b5df>] ? __lock_acquire+0xb57/0xb73 [ 94.342509] [<c0249c04>] ? mark_lock+0x1e/0x1c7 [ 94.342509] [<f8364963>] ? hci_rx_task+0xd2/0x1bc [bluetooth] [ 94.342509] [<fab95346>] l2cap_recv_acldata+0xb1/0x1c6 [l2cap] [ 94.342509] [<f8364997>] hci_rx_task+0x106/0x1bc [bluetooth] [ 94.342509] [<fab95295>] ? l2cap_recv_acldata+0x0/0x1c6 [l2cap] [ 94.342509] [<c02302c4>] tasklet_action+0x69/0xc1 [ 94.342509] [<c022fbef>] __do_softirq+0x94/0x11e [ 94.342509] [<c022fcaf>] do_softirq+0x36/0x5a [ 94.342509] [<c022fe14>] irq_exit+0x35/0x68 [ 94.342509] [<c0204ced>] do_IRQ+0x72/0x89 [ 94.342509] [<c02038ee>] common_interrupt+0x2e/0x34 [ 94.342509] [<c024007b>] ? pm_qos_add_requirement+0x63/0x9d [ 94.342509] [<c038e8a5>] ? acpi_idle_enter_bm+0x209/0x238 [ 94.342509] [<c049d238>] cpuidle_idle_call+0x5c/0x94 [ 94.342509] [<c02023f8>] cpu_idle+0x4e/0x6f [ 94.342509] [<c0534153>] rest_init+0x53/0x55 [ 94.342509] [<c0781894>] start_kernel+0x2f0/0x2f5 [ 94.342509] [<c0781091>] i386_start_kernel+0x91/0x96

Reported-by: Oliver Hartkopp oliver@hartkopp.net Signed-off-by: Dave Young hidave.darkstar@gmail.com Tested-by: Oliver Hartkopp oliver@hartkopp.net Signed-off-by: David S. Miller davem@davemloft.net

diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c index 555d9da..77e9fb1 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 = {