linux-kernel - Re: [PATCH 00/10] TTY: switch flipping functions to tty

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Message-ID: <50F6CE7E.4090807@suse.cz>
Date:	Wed, 16 Jan 2013 16:59:58 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	Greg KH <gregkh@...uxfoundation.org>, alan@...ux.intel.com,
	jirislaby@...il.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/10] TTY: switch flipping functions to tty_port

On 01/16/2013 04:44 PM, Steven Rostedt wrote:
> On Wed, 2013-01-16 at 14:37 +0100, Jiri Slaby wrote:
>> Steven, do you have any plans with the driver? What is its planned destiny?
> 
> Well, I'm currently using the device in my main machine. As it is my
> main box, I don't update the kernel as often.
> 
> Let me know what I need to do to fix it in the current kernel.

Every port in the system has to have its struct tty_port counterpart.

/me looked into the code

OMG. It contains a true copy of serial_core!

In the beginning (to remove the BROKEN flag), what it needs is struct
tty_port to be added to struct sb_uart_info. It obviously needs
tty_port_init + tty_port_destroy at appropriate places. Then it needs
tty_register_device to be switched to tty_port_register_device.

Finally, having the tty_port, all tty flipping functions take the
tty_port, not tty_struct (the build errors reported). This is easy while
you have a tty_port.

In the long term, it needs to get rid of the all the pseudo-uart* stuff
(the copy of serial_core) and use only tty layer+tty_port helpers.

thanks,
-- 
js
suse labs
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