linux-kernel - Re: [RFC 1/2] input: mt: Add method to extract the MT slot state

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Message-ID: <20110128183413.GA2553@polaris.bitmath.org>
Date:	Fri, 28 Jan 2011 19:34:13 +0100
From:	"Henrik Rydberg" <rydberg@...omail.se>
To:	Benjamin Tissoires <benjamin.tissoires@...c.fr>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Ping Cheng <pingc@...om.com>, Jiri Kosina <jkosina@...e.cz>,
	Chris Bagwell <chris@...bagwell.com>,
	Rafi Rubin <rafi@...s.upenn.edu>,
	Stephane Chatty <chatty@...-enac.fr>,
	Peter Hutterer <peter.hutterer@...-t.net>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC 1/2] input: mt: Add method to extract the MT slot state

> > Thanks for the patches, Benjamin, perhaps they do need a bit of
> > rewrite or a new ioctl. We will see what happens.
> >
> 
> Today  I found a bug in these 2 patches: they send garbage with
> devices that use protocol A.
> This is definitely a bad idea to send the input_absinfo.
> 
> In addition to that, using the original behavior (which seems better)
> does not seems to add sth in regard to input_mt_get_value.
> It would just add some guards that can be resumed in just a test:
> (code >= ABS_MT_FIRST && code <= ABS_MT_LAST && dev->mt &&
> 	slot >= 0 && slot < dev->mtsize)
> 
> Henrik, if you want to introduce the new IOCTL, feel free, I don't
> need it right now.

Ok - for the record, neither of us actually re-initiated this thing,
so it still falls into the nice-to-have category. The good thing is
there is now a clear path on how to proceed.

Thanks Benjamin.

Henrik
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