linux-kernel - Re: [PATCH 1/4] hvc_console: do not set low

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Date:	Tue, 13 Jan 2009 12:28:41 +0100
From:	Christian Borntraeger <borntraeger@...ibm.com>
To:	Milton Miller <miltonm@....com>
Cc:	Benjiman Herrenschmidt <benh@...nel.crashing.org>,
	linuxppc-dev list <linuxppc-dev@...abs.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Joe Peterson <joe@...rush.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [PATCH 1/4] hvc_console: do not set low_latency

Am Dienstag 13 Januar 2009 schrieb Christian Borntraeger:
>  drivers/char/hvc_console.c |    5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> Index: linux-2.6/drivers/char/hvc_console.c
> ===================================================================
> --- linux-2.6.orig/drivers/char/hvc_console.c
> +++ linux-2.6/drivers/char/hvc_console.c
> @@ -318,8 +318,6 @@ static int hvc_open(struct tty_struct *t
>  	} /* else count == 0 */
> 
>  	tty->driver_data = hp;
> -	tty->low_latency = 1; /* Makes flushes to ldisc synchronous. */
> -
>  	hp->tty = tty;
> 
>  	spin_unlock_irqrestore(&hp->lock, flags);
> @@ -327,6 +325,9 @@ static int hvc_open(struct tty_struct *t
>  	if (hp->ops->notifier_add)
>  		rc = hp->ops->notifier_add(hp, hp->data);
> 
> +	if (!hp->irq_requested)
> +		tty->low_latency = 1; /* Makes flushes to ldisc synchronous. */
> +
>  	/*
>  	 * If the notifier fails we return an error.  The tty layer
>  	 * will call hvc_close() after a failed open but we don't want to clean
> 
> 

Just in case:

Signed-off-by: Christian Borntraeger <borntraeger@...ibm.com>
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