linux-kernel - Re: [PATCH] serial: do not add port that is not initialized

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Message-ID: <20070711194050.GB28258@flint.arm.linux.org.uk>
Date:	Wed, 11 Jul 2007 20:40:50 +0100
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	Bjorn Helgaas <bjorn.helgaas@...com>
Cc:	Yinghai Lu <Yinghai.Lu@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andi Kleen <ak@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] serial: do not add port that is not initialized

On Wed, Jul 11, 2007 at 10:05:53AM -0600, Bjorn Helgaas wrote:
> On Wednesday 11 July 2007 01:17:42 am Russell King wrote:
> > On Tue, Jul 10, 2007 at 05:03:35PM -0700, Yinghai Lu wrote:
> > > [PATCH] serial: do not add port that is not initialized
> > > 
> > > if the port is not initialized with correct iobase, and membase, we don't
> > > need to add that port.
> > > for x86, when pnpacpi is enabled, we will not get extra ttyS1/ttyS2/ttyS3 in
> > > /sys/devices/platform/serial8250/tty
> > > 
> > > Sign-off-by: Yinghai Lu <yinghai.lu@....com>
> > 
> > What if someone wants to run setserial on /dev/ttyS1 to set it's base
> > address, irq and other parameters?  People still do this.
> 
> I agree that people still use setserial that way, and we shouldn't
> make this change because it would break things.
> 
> But I also agree with Yinghai that these extra phantom devices are
> just weird.  It would be a lot nicer if there were a way to say,
> "please, Mr. Serial Driver, create me a new ttyS device with these
> parameters."
> 
> But no, I'm not volunteering to do that.

Indeed, and since distros still haven't picked up my setserial v3,
I see little chance of that ever being practical.  Not that I've
really tried very hard to get them to - no real idea who to contact
to make that happen, and of course I've no interest in making it
happen anymore.

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