On Mon, 18 Nov 2013, Luke-Jr wrote: > Is there a way to tell if a USB device is in use or not before requesting the > kernel detach drivers? > > I'd define "in use" as either an interface claimed on usbfs or tty/etc > provided by a kernel driver being opened. And "not in use" including "kernel > driver attached, but not interfacing device to any software".
There is a form of the detach-driver call in usbfs that will not do anything if the current driver is usbfs. But there is no way to tell if a tty or other device file is open, or if the device is interfaced to any software. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
