Am Montag, 27. November 2006 04:22 schrieb David Brownell:
> On Sunday 26 November 2006 6:46 pm, Alan Stern wrote:
> > On Sun, 26 Nov 2006, David Brownell wrote:
> >
> > > On Thursday 23 November 2006 6:19 am, Oliver Neukum wrote:
> > > > Hi,
> > > >
> > > > gl620a uses a buffer within a struct. This can corrupt memory on
> > > > machines
> > > > that are not cache coherent.
> > >
> > > How could it possibly corrupt memory?
> >
> > It would be more accurate to say that it could corrupt the contents of the
> > buffer during an input operation. I don't think it matters as far as
> > output is concerned...
>
> The question still remains: how could this corruption happen?
By reading irq_urb before the cache coherency operation. In this case
the buffer contents read latter can be corrupted as far as they share
a cache line.
Regards
Oliver
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