Re: Unaligned access in EHCI driver

Pete Zaitcev <[email protected]>
Newsgroups gmane.linux.usb.devel
Organization Red Hat, Inc.
Message-ID <[email protected]>
On Thu, 1 Mar 2007 21:45:16 -0500 (EST), Alan Stern <[email protected]> wrote:

> > > I get following warnings on spar64:
> > > Kernel unaligned access at TPC[1000c9e4] ehci_hub_control+0x54c/0x68c [ehci_hcd]
> > > 
> > > Despite of the comment in the patched code, the type cast used there
> > > does make unaligned access. The fix was made as it's done in
> > > ohci-hub.c.
> > 
> > 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.
> 
> Max, do you have a stack dump for the unaligned access?

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

-- Pete

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