Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> writes: > On Thu, May 02, 2024 at 11:45:44AM +0100, Måns Rullgård wrote: >> Johan Hovold <johan@xxxxxxxxxx> writes: >> >> > On Thu, May 02, 2024 at 11:07:28AM +0100, Mans Rullgard wrote: >> >> Use tty_port_register_device_serdev() so that usb-serial devices >> >> can be used as serdev controllers. >> > >> > I'm afraid it's not that easy. The reason serdev is not enabled for >> > usb-serial is that there's currently no support for handling hotplug in >> > serdev. The device can go away from under you at any time and then you'd >> > crash the kernel. >> >> Oh, that's unfortunate. Regular serial ports can go away too, though, >> and that seems to be handled fine. What am I missing? > > How is it handled? Normal serial ports can go away but in practice, > it's a rare occurance, and usually people use serdev for devices where > the ports can not be removed (i.e. internal connections). If I unbind a regular serial port from its driver using sysfs, a serdev device defined in a device tree gets removed as expected. Binding the serial port makes everything come back again. I fail to see any problem here. If there is one, you'll have to be less evasive in explaining what it is. -- Måns Rullgård
