From: [EMAIL PROTECTED]
Date: Wed, 08 Nov 2006 19:51:05 -0800
> From: Peter Zijlstra <[EMAIL PROTECTED]>
>
> =============================================
> [ INFO: possible recursive locking detected ]
> 2.6.18-1.2726.fc6 #1
> ---------------------------------------------
> hidd/2271 is trying to acquire lock:
> (sk_lock-AF_BLUETOOTH){--..}, at: [<f8d16241>] bt_accept_dequeue+0x26/0xc6
> [bluetooth]
>
> but task is already holding lock:
> (sk_lock-AF_BLUETOOTH){--..}, at: [<f8bce088>] l2cap_sock_accept+0x41/0x11e
> [l2cap]
>
> other info that might help us debug this:
> 1 lock held by hidd/2271:
> #0: (sk_lock-AF_BLUETOOTH){--..}, at: [<f8bce088>]
> l2cap_sock_accept+0x41/0x11e [l2cap]
>
> stack backtrace:
> [<c04051ed>] show_trace_log_lvl+0x58/0x16a
> [<c04057fa>] show_trace+0xd/0x10
> [<c0405913>] dump_stack+0x19/0x1b
> [<c043b7dc>] __lock_acquire+0x6ea/0x90d
> [<c043bf70>] lock_acquire+0x4b/0x6b
> [<c05b203b>] lock_sock+0xac/0xbc
> [<f8d16241>] bt_accept_dequeue+0x26/0xc6 [bluetooth]
> [<f8bce129>] l2cap_sock_accept+0xe2/0x11e [l2cap]
> [<c05b142e>] sys_accept+0xd8/0x179
> [<c05b1576>] sys_socketcall+0xa7/0x186
> [<c0403fb7>] syscall_call+0x7/0xb
>
> classical case of nesting; bt_accept_dequeue() locks the children of the
> object
> locked by l2cap_sock_accept().
>
> Signed-off-by: Peter Zijlstra <[EMAIL PROTECTED]>
> Acked-by: Marcel Holtmann <[EMAIL PROTECTED]>
> Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Applied, thanks.
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