USB config SX lock deadlock

[Hans Petter Selasky]

On 10/09/13 12:38, Daniel O'Connor wrote:
>
> On 09/10/2013, at 20:59, Hans Petter Selasky <hps at bitfrost.no> wrote:
>>> I have previously run the same hardware on 9.0 (where there was a panic in devfs triggered if the DAQ card disconncted sometimes) and 9.1 (where I have not seen any problems).
>>>
>>> Does anyone have an idea about how I could go about gathering more information if it happens again?
>>>
>> It is not a deadlock. It is just that the reference in /dev/cuaUX does not go away. Have you tried 9-stable?
>

Hi,

> It is actually running r253505, sorry I should have mentioned that before.
>
> It isn't a serial device, although the driver is a thin wrapper around the usb_fifo code (which is very useful - thanks :)

Does your application close the file handle when it gets a read/poll error?

>> There are also some sysctls you can set, see hw.usb to change the shutdown behaviour.
>
> This would be hw.usb.no_shutdown_wait ?

Yes, correct!

--HPS