Re: [PATCH 1/1] integer overflow issue in 'appletouch' driver

From: Johannes Berg
Date: Sat Aug 07 2010 - 11:47:50 EST

On Sat, 2010-08-07 at 14:00 +0000, Serge Belyshev wrote:
> Hi!
> Since 2.6.34 the touchpad on my feb 2005 powerbook (mod. A1106) has
> stopped working. I've identified the following guilty patch:
> > ... Testing on one of such PowerBooks I have
> > noticed that touchpad always generates positive values, but some of
> > them are greater that 127, and thus, when cast to 'signed char' being
> > interpreted as a negative.
> My device is 05ac:020e "fountain", actually generates *signed* values,
> thus the patch completely breaks it.

I think Ben might have the same issue. I guess we need per-touchpad
functions to read the data.


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