Am Sonntag, 13. März 2005 04:24 schrieb Alan Stern:
> On Sun, 13 Mar 2005, Brian Murphy wrote:
>
> > Hi,
> > This line in the acm_probe routine
> >
> > tty_register_device(acm_tty_driver, minor, &intf->dev);
> >
> > causes the path to the tty created for each acm to be linked to
> > the usb interface. As long as the device is closed when it is
> > disconnected this is no problem but if the tty is open then the
> > tty deregistering is deferred. When the terminal is closed
> > the interface parent to the tty no longer exists and the kernel
> > crashes in kobject_get_path.
> >
> > The solution is to not link the two things together and replace
> > &intf->dev above with NULL, see the attached patch.
> >
> > I believe that someone else had the same problem a few days
> > ago.
>
> Would another possibility be to call usb_get_intf() before calling
> tty_register_device() and usb_put_intf() when the link is no longer
> needed? That way the interface parent to the tty would exist for as long
> as needed.
That way the linkage could be used as intended. I'll give it a try.
Regards
Oliver
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