Re: [PATCH v2 0/4] TTY: port hangup and close fixes

[Peter Hurley <peter@hurleysoftware.com>]

On Tue, 2013-02-26 at 12:14 +0100, Johan Hovold wrote:
> These patches against tty-next fix a few issues with tty-port hangup and
> close.
> 
> The first and third patch are essentially clean ups.
> 
> The second patch makes sure DTR is dropped also on hangup and that DTR
> is only dropped for initialised ports (where is could have been raised
> in the first place).
> 
> The fourth and final patch, make sure no tty callbacks are made from
> tty_port_close_start when the port has not been initialised (successfully
> opened). This was previously only done for wait_until_sent but there's
> no reason to call flush_buffer or to honour port drain delay either.
> The latter could cause a failed open to stall for up to two seconds.
> 
> As a side-effect, these patches also fix an issue in USB-serial where we could
> get tty-port callbacks on an uninitialised port after having hung up and
> unregistered a device after disconnect.
> 
> Johan
> 
> 
> v2:
>  - reuse tty reference from hangup and close in shutdown. Both call sites
>    guarantee tty is either NULL or has a kref.

Great, thank you.

Peter