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From: Jiri Slaby <jirislaby@gmail.com>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Cc: p.hardwick@option.com, hollisb@us.ibm.com
Subject: tty->low_latency + irq context
Date: Tue, 26 Dec 2006 01:08:41 +0059	[thread overview]
Message-ID: <45906820.10805@gmail.com> (raw)

Hi!

 *      tty_flip_buffer_push    -       terminal
 *      @tty: tty to push
 *
 *      Queue a push of the terminal flip buffers to the line discipline. This
 *      function must not be called from IRQ context if tty->low_latency is set.

But some drivers (mxser, nozomi, hvsi...) sets low_latency to 1 in _open and
calls tty_flip_buffer_push in isr or in functions, which are called from isr.
Is the comment correct or the drivers?

Moreover, hvsi says:
tty->low_latency = 1; /* avoid throttle/tty_flip_buffer_push race */

thanks,
-- 
http://www.fi.muni.cz/~xslaby/            Jiri Slaby
faculty of informatics, masaryk university, brno, cz
e-mail: jirislaby gmail com, gpg pubkey fingerprint:
B674 9967 0407 CE62 ACC8  22A0 32CC 55C3 39D4 7A7E

             reply	other threads:[~2006-12-26  0:08 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-12-26  0:09 Jiri Slaby [this message]
2007-01-02 17:17 ` tty->low_latency + irq context Hollis Blanchard
2007-01-02 18:12   ` Paul Fulghum
2007-01-02 18:29     ` Paul Fulghum
2007-01-02 18:38   ` Alan
2007-01-02 19:36     ` Hollis Blanchard

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