linux-kernel - Re: should RTS init in serial core be tied to CRTSCTS

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Message-ID: <20070308142017.GB30023@flint.arm.linux.org.uk>
Date:	Thu, 8 Mar 2007 14:20:18 +0000
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@....net>
Cc:	Robin Getz <rgetz@...ckfin.uclinux.org>,
	Oleksiy Kebkal <kebkal@...il.com>,
	Krzysztof Halasa <khc@...waw.pl>,
	Mike Frysinger <vapier.adi@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-serial@...r.kernel.org
Subject: Re: should RTS init in serial core be tied to CRTSCTS

On Thu, Mar 08, 2007 at 03:16:08PM +0100, Carl-Daniel Hailfinger wrote:
> Hi,
> 
> On 08.03.2007 14:48, Russell King wrote:
> > As I've said already, having a console on the same port as your application
> > program is just asking for trouble.  All bets are off - the kernel _will_
> > corrupt your data stream in random places.
> > 
> > Don't do it - it will _NEVER_ be reliable.
> > 
> > Never, ever, mix kernel consoles with application serial ports.
> 
> Unless you want two machines to monitor each other via serial console and
> each of them has only one serial port. It's not perfect, but it works well
> enough despite all claims to the contrary.

That's fine - you're not sending application specific data which could
be corrupted by an inopportune kernel message.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
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