linux-kernel - Re: 2.6.36/2.6.37: broken compatibility with userspace input-utils ?

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Message-ID: <20110126194127.GE29268@core.coreip.homeip.net>
Date:	Wed, 26 Jan 2011 11:41:27 -0800
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Mark Lord <kernel@...savvy.com>
Cc:	Mauro Carvalho Chehab <mchehab@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	linux-input@...r.kernel.org, linux-media@...r.kernel.org
Subject: Re: 2.6.36/2.6.37: broken compatibility with userspace input-utils ?

On Wed, Jan 26, 2011 at 02:33:17PM -0500, Mark Lord wrote:
> On 11-01-26 12:32 PM, Mauro Carvalho Chehab wrote:
> > Em 26-01-2011 13:05, Mark Lord escreveu:
> ..
> >> Nope. Does not work here:
> >>
> >> $ lsinput
> >> protocol version mismatch (expected 65536, got 65537)
> > 
> > You need to relax the version test at the tree. As I said before, this is
> > a development tool from the early RC days, bound to work with one specific
> > version of the API, and programmed by purpose to fail if there would by any
> > updates at the Input layer.
> ..
> 
> As I said before, I personally have done that on my copy here.
> But that's not what this thread is about.
> 
> This thread is about broken userspace courtesy of these changes.
> So I am testing with the original userspace binary here,
> and it still fails.  And will continue to fail until that regression is fixed.

I do not consider lsinput refusing to work a regression. The tool
claims to work with particular protocol version and it is tool's choice.

Shall I write a utility that checks kernel version and only works with
2.6.37 and yell when we release 2.6.38?

-- 
Dmitry
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