Sorry, I missed the later replies on this list and the new one today on libusb-devel. I understand now. Anyone have a patch for libusb-0.1, too?
-----Original Message----- From: Michael Plante [mailto:[email protected]] Sent: Tuesday, October 05, 2010 11:50 AM To: [email protected] Subject: RE: Claiming devices has no effect under Linux Uwe Bonnes [mailto:[email protected]] wrote: >> >>>>> "Thomas" == Thomas Klose <[email protected]> writes: >> >> >> Thomas> Now it works as expected. What is this function needed for, >> Thomas> anyway? I whitch case is it necessary to detach a module >> Thomas> explicitly? >> >> There are a lot of FTDI devices out there, and in most cases ftdi_sio is >> loaded for that device when the device is plugged in. Without the call to >> usb_detach_kernel_driver_np(), in that case libftdi can't talk to the >> device. So the call to usb_detach_kernel_driver_np() is needed in many >> situations. >> >> In your situation, however it is wrong. Ideas how to handle that situation >> are welcome. I'm confused about something. It seems that in the case Sven and Eberhard describe on the libusb-devel thread http://libusb.6.n5.nabble.com/How-to-establish-EXCLUSIVE-instead-of-SHARED-a ccess-to-usb-device-td6878.html , the detach call comes BEFORE the call to claim an interface. It also seems this happens in libftdi. Given the order these two operations happen in, why does detaching the driver break a claim that theoretically shouldn't even exist (YET)? Thanks, Michael -- libftdi - see http://www.intra2net.com/en/developer/libftdi for details. To unsubscribe send a mail to [email protected]
