On Fri, 2 Mar 2007, Max Dmitrichenko wrote:

> > > > Strange ... but, ACK.
> > >
> > > It would be a good idea to track this down a little further.  The comment
> > > in the code _should_ be correct.  If it isn't, then something funny is
> > > going on.
> 
> Why then the OHCI driver (ohci-hub.c) in the same function does have
> explicit put_unaligned()?

I don't know.  Probably there was no particular reason; the two routines 
were written at different times and done in different ways.  Look in 
uhci-hub.c for yet a third variation; it uses two aligned 16-bit writes.

> > >
> > > Max, do you have a stack dump for the unaligned access?
> >
> 
> No, how can I get the dump if really need it?

Use dmesg after the problem occurs, or just copy the data from the console 
screen (use a VT or a serial console, not X).

Alan Stern


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