linux-kernel - Re: [PATCH v3 43/44] tty/metag

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Date:	Mon, 14 Jan 2013 11:15:01 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	James Hogan <james.hogan@...tec.com>
CC:	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	Cesar Eduardo Barros <cesarb@...arb.net>,
	Joe Perches <joe@...ches.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH v3 43/44] tty/metag_da: Add metag DA TTY driver

Hi,

On 01/11/2013 11:50 AM, James Hogan wrote:
>>> +	channel_driver->driver_name = "ttyDA";
>> 
>> This should be rather "metag".
> 
> Yes, I'll set to "metag_da" if that's okay since the transport is
> the DA. I presume this is pretty much just to appear in
> /proc/tty/drivers?

Yes.

>>> +static void dashtty_exit(void) +{ +
>>> del_timer_sync(&put_timer); +	kthread_stop(dashtty_thread); +
>>> del_timer_sync(&poll_timer); +
>>> tty_unregister_driver(channel_driver); +
>>> put_tty_driver(channel_driver);
>> 
>> No tty_port_destroy anywhere?
> 
> Ah yes, I've added a loop to do this before put_tty_driver() both
> here and in the error handling of dashtty_init().
> 
> This driver isn't actually buildable as a module at the moment, but
> if it was, would the module owner being set ensure that the
> ttys/ports are closed down prior to dashtty_exit being called?
> (i.e. is it racy?)

Yeah, dashtty_exit won't be called until all openers are gone.

regards,
-- 
js
suse labs
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