USB config SX lock deadlock

[Hans Petter Selasky]

On 10/09/13 23:25, Daniel O'Connor wrote:
>
> On 09/10/2013, at 22:43, Hans Petter Selasky <hps at bitfrost.no> wrote:
>> 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:
>>> 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?
>
>
> It might under some circumstances but not directly.
>
> It has 3 sub interfaces, if there is an error on one the the DAQ program will call abort() which would result in FDs being closed.
>
> However that sub interface does not use read/poll only ioctl.
>

Hi,

How do these IOCTLs work?

Do you wakeup any sleepers at "surprise" detach?

--HPS