Hi, On Tue, Oct 20, 2015 at 11:57 AM, Peter Stuge <peter@xxxxxxxx> wrote: > Greg K-H wrote: >> >> Userspace still has the port open, so the number is not reused until >> >> userspace closes the device node. Fix your userspace programs to >> >> properly listen to the hangup signal to know to release the device >> >node >> >> and you should be fine. >> > >> >There's still a bit of a race condition here, isn't there? >> > >> >Is there any good way to deal with that? >> >> What race condition are you seeing here? > > USB cable is unplugged Assuming /dev/ttyUSB0 is opened by process ATM. > Process is sent SIGHUP > USB cable is quickly replugged /dev/ttyUSB0 is still open, so /dev/ttyUSB1 is created. > Process closes port Process closes /dev/ttyUSB0. Regards, -Bin. > > > //Peter > -- > 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 -- 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
