linux-kernel - line discipline and tty driver

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Message-Id: <45D71555.000002.20869@webmail9.yandex.ru>
Date:	Sat, 17 Feb 2007 17:46:45 +0300 (MSK)
From:	"Mockern" <Mockern@...dex.ru>
To:	linux-kernel@...r.kernel.org
Subject: line discipline and tty driver

I have a question regarding line discipline:

in http://www.linux.it/~rubini/docs/serial/serial.html is shown data flow for Linux tty driver.

When it's necessary to use line discipline in tty driver (to call ldisc.write(), ldisc.read(), ldisc.receive_buf()) and when I can ignore line discipline in my tty driver? 

Thanks 
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