On Wednesday 27 February 2013 13:52:26 Johan Hovold wrote:
> Unregister tty device in disconnect as is required by the USB stack.
>
> By deferring unregistration to when the last tty reference is dropped,
> the parent interface device can get unregistered before the child
> resulting in broken hotplug events being generated when the tty is
> finally closed:
>
> KERNEL[2290.798128] remove
> /devices/pci0000:00/0000:00:1d.7/usb2/2-1/2-1:3.1 (usb)
> KERNEL[2290.804589] remove /devices/pci0000:00/0000:00:1d.7/usb2/2-1 (usb)
> KERNEL[2294.554799] remove /2-1:3.1/tty/ttyACM0 (tty)
>
> The driver must deal with tty callbacks after disconnect by checking the
> disconnected flag. Specifically, further opens must be prevented and
> this is already implemented.
>
> Cc: stable <[email protected]>
> Signed-off-by: Johan Hovold <[email protected]>
Acked-by: Oliver Neukum <[email protected]>
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