> > > 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()?

> >
> > Max, do you have a stack dump for the unaligned access?
>

No, how can I get the dump if really need it?

> Perhaps the SLAB poisoning offset something. Althogh usually it offsets
> by 4 bytes, maybe a 64-bit log got involved somewhere or whatnot.

If I understand write, the only place from which the ehci_hub_control
is called is function rh_call_control(). But it passes a pointer to
the buffer allocated on the stack with __attribute__((aligned(4))).
That way no SLAB is involved.

If you suspect something is wrong and want to investigate the problem
more deeply I'm ready to help you as I can.

--
  Max

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