linux-kernel - Re: [PATCH] serial: DCC(JTAG) serial and console emulation support

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Date:	Thu, 7 Oct 2010 14:52:21 -0700
From:	Greg KH <gregkh@...e.de>
To:	Daniel Walker <dwalker@...eaurora.org>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org,
	"Hyok S. Choi" <hyok.choi@...sung.com>,
	Tony Lindgren <tony@...mide.com>,
	Jeff Ohlstein <johlstei@...cinc.com>,
	Ben Dooks <ben-linux@...ff.org>,
	Alan Cox <alan@...ux.intel.com>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Mike Frysinger <vapier@...too.org>,
	Feng Tang <feng.tang@...el.com>,
	Tobias Klauser <tklauser@...tanz.ch>,
	Jason Wessel <jason.wessel@...driver.com>,
	Philippe Langlais <philippe.langlais@...ricsson.com>
Subject: Re: [PATCH] serial: DCC(JTAG) serial and console emulation support

On Thu, Oct 07, 2010 at 02:47:18PM -0700, Daniel Walker wrote:
> On Thu, 2010-10-07 at 14:15 -0700, Greg KH wrote:
> > On Thu, Oct 07, 2010 at 01:51:18PM -0700, Daniel Walker wrote:
> > > Your making too many assumptions .. You might be able to modify the
> > > kernel, and not the userspace. So you couldn't tweak the device
> > > creation .. It's much easier in the server world ..
> > 
> > You're saying it's easier to replace an embedded kernel than a userspace
> > file on an embedded system?  Heh, that's funny.
> 
> I'm saying it _can_ happen that it's easier to replace the kernel.. I'm
> not saying it's always the case. We're talking about debugging
> situations in an embedded environment which don't always follow a normal
> path.

Nothing is "normal", so stop trying to say it is easier in the "server"
world please.

> > > > We've said no over a period of about ten years to a lot of attempts to
> > > > just borrow the ttyS0 range. If we'd said yes it would have been a
> > > > complete mess by now.
> > > > 
> > > > So the answer is no.
> > > 
> > > Nothing can be unilateral, there's always room for exceptions. You
> > > should say something more like "it's possible, but unlikely".
> > 
> > Hm, how about this, as the TTY and serial driver[1] maintainer, I will
> > not accept this kind of patch at all.
> > 
> > Is that final enough for you?
> 
> So you don't like it, that's fair enough .. <thinks>I wonder what other
> maintainers I can send this too</thinks> ;)
> 
> Can you be more specific about your objections

See everything that Mike and Alan wrote, do I need to repeat it?

greg k-h
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