Bjørn Mork <bjorn@xxxxxxx> writes: > Bjørn Mork <bjorn@xxxxxxx> writes: >> Italo Migotto <imigotto@xxxxxxxxx> writes: >> >>> they are modems. yes, I only use one of the interfaces, but couldn´t >>> find a way to unbind individual interfaces, only the whole device. >> >> You can unbind individual ports like this: >> >> echo ttyUSB0 > /sys/bus/usb-serial/drivers/<drivername>/unbind > > Sorry. That didn't work as expected. Should be fixed... ... or maybe not. Took a quick peek at drivers/usb/serial/bus.c and became more confused. usb_serial_device_remove() will just unregister the tty device, and usb_serial_device_probe() will the let you register it again. So you save a tty device, but unbinding from the usb-serial driver this way doesn't free any other resources. In particular not the precious ttyUSB minors. I find that behaviour a bit confusing. I did expect that unbinding would cause all resources related to the unbound port to be freed and made available for other drivers and/or devices. But I don't see any way this can be changed either. If we propagate the unbind to the usb driver, then there is no way to keep usb-serial "bind" working like before. And I guess that's not acceptable... And the tools to do what I want are already there: Just unbind from the usb driver instead of the usb-serial driver. So better leave it as it is. This is probably even already documented somewhere :-) Bjørn -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
