Re: usb flashkey disk copy error

Barney Wolff wrote this message on Sun, Sep 07, 2003 at 13:46 -0400:
> On Sun, Sep 07, 2003 at 12:32:46AM -0700, John-Mark Gurney wrote:
> > 
> > You're the second person that has reported corruption with USB umass
> > devices.  I am interested in tracking down this problem, but it's a
> > bit difficult since I haven't seen it myself.
> 
> Make me the third.  I have a Sony F707 camera, which I can use on
> 4-stable and with 5-current on a Dell I5000 laptop, but not on 5-current
> on an Asus A7M266-D with world/kernel built 9/4/03.  The bad data starts
> at byte 4096, always.  The problem has existed for at least a month,

Ahh, this is useful information.  What are the controller types
of the two machines?  ohci? uhci?  I think it might be ohci, and
it maybe a page miscalculation when dispatching the request.

Have you looked at the corrupted data?  does it apear to be from
some other location, like the kernel?

> perhaps longer; I can't remember if it ever worked on the Asus.  But
> the same system runs fine with usb keyboard and mouse - which proves
> nothing as the data rate and amount are so small.  So I can't rule
> out hardware as the problem.  In a few days I can try booting from
> a 4.8 live cd and see if the hardware works ok.  Old-quirks had no
> effect on the problem.

It's been about two months since I updated USB to use bus_dma.  So
you could try checking out the usb code from July 4th or so and see
if it goes away (it probably will).

-- 
  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."