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Subjectwarn_on in mutex_lock_nested after hciattach
Hi!

I get this, repeatably.

Pavel

root@amd:~# setserial /dev/ttyBT baud_base 921600
root@amd:~# hciattach -s 921600 /dev/ttyS0 bcsp
Device setup complete
root@amd:~# ------------[ cut here ]------------
WARNING: at kernel/mutex.c:207 mutex_lock_nested+0x219/0x230()
Hardware name: 17097HU
Modules linked in:
Pid: 0, comm: swapper Not tainted 2.6.32-rc8-00165-g2471433-dirty #92
Call Trace:
[<c07824d9>] ? printk+0x18/0x1a
[<c07843c9>] ? mutex_lock_nested+0x219/0x230
[<c023131c>] warn_slowpath_common+0x6c/0xc0
[<c07843c9>] ? mutex_lock_nested+0x219/0x230
[<c0231385>] warn_slowpath_null+0x15/0x20
[<c07843c9>] mutex_lock_nested+0x219/0x230
[<c03e1afb>] ? tty_unthrottle+0x1b/0x50
[<c0594bf2>] ? hci_uart_tty_receive+0x62/0x70
[<c03e1afb>] tty_unthrottle+0x1b/0x50
[<c0594bf9>] hci_uart_tty_receive+0x69/0x70
[<c03e380b>] flush_to_ldisc+0x15b/0x190
[<c03e38ab>] tty_flip_buffer_push+0x6b/0x80
[<c0443587>] serial8250_handle_port+0x197/0x230
[<c078545a>] ? _spin_lock+0x3a/0x40
[<c044368e>] serial8250_interrupt+0x6e/0xf0
[<c026801e>] handle_IRQ_event+0x2e/0xc0
[<c0269ac4>] handle_fasteoi_irq+0x64/0xd0
[<c02053fa>] handle_irq+0x1a/0x30
[<c0204bb6>] do_IRQ+0x46/0xc0
[<c024abb2>] ? sched_clock_local+0xd2/0x170
[<c02034a9>] common_interrupt+0x29/0x30
[<c024007b>] ? sys_setpgid+0xfb/0x180
[<c03cf298>] ? acpi_idle_enter_simple+0x132/0x15d
[<c03cef8b>] acpi_idle_enter_bm+0xc3/0x29e
[<c05a360d>] cpuidle_idle_call+0x7d/0xc0
[<c0201efd>] cpu_idle+0x4d/0x80
[<c075e943>] rest_init+0x53/0x60
[<c0a5981a>] start_kernel+0x272/0x2ad
[<c0a5936e>] ? unknown_bootoption+0x0/0x1e9
[<c0a5906b>] i386_start_kernel+0x6b/0x6d
---[ end trace bab0b3b26c16fcf5 ]---


--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html


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