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SubjectRe: Contacts within AMD? AMD-756 USB host-controller blacklisted due to
i would like to help to track down this problem
i'm using a gigabyte 7IXE revision 1.1
kernel is 2.4.1

lspci output for usb:
00:07.4 USB Controller: Advanced Micro Devices [AMD] AMD-756 [Viper] USB
(rev 06) (prog-i
f 10 [OHCI])
Flags: bus master, medium devsel, latency 16, IRQ 11
Memory at efffc000 (32-bit, non-prefetchable) [size=4K]

On Wed, 4 Apr 2001, Miles Lane wrote:
> Thomas Dodd wrote:
> > Alan Cox wrote:
> >
> >> because we dont know the full scope of the problem yet.
> > Exactly how many bug reports has this caused?
> > What kind of problems?

here i only have this kernelmessage floating around in my logfiles about 1
time the day:

Apr 4 14:47:15 campari kernel: usb-ohci.c: bogus NDP=204 for OHCI
Apr 4 14:47:15 campari kernel: usb-ohci.c: rereads as NDP=4

> error." Most of the time, when the error occurs, it seems
> pretty benign. That is, I haven't noticed it crashing USB
> device connections, causing data corruption or OOPSen.
> Some folks _have_ reported OOPSen, though, that seemed to
> be triggered by the erratum #4 hardware bug. I think I
> may have had one of these a long time ago.

as you see it's revision 6
i've had no other problems with usb for now and use this
idVendor 0x046d Logitech Inc.
idProduct 0xc00c
usb-wheelmouse all the time

i've never had this kernel or previous kernel (2.4.0test8) oopsen
and it runs perfectly stable here

> I believe David has found that there definitely are code
> paths where this hardware bug can cause failures of various
> sorts and that's why the AMD-756 has been blacklisted.

since i did'nt cause any troubles here i would not like to have the
complete AMD-756 blacklisted in the ohci-driver
eventually only some revisions are that bad

please correct me if i'm wrong i only don't want to blacklist complete

Joachim 'roh' Steiger
Convergence Integrated Media GmbH
Rosenthaler Str. 51 fon: +49(0)30-72 62 06 77
10178 Berlin, Germany fax: +49(0)30-72 62 06 55

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