On Thursday 20 December 2007, Alan Stern wrote:
> > I also got a report of some USB sticks that didn't like to see the PING
> > packets during EP0 transfers.  Now I've got to see whether the USB spec
> > even allows those ... and in any case, how to disable pinging on EP0
> > when using EHCI.
> 
> I think it does allow PINGs during the data stage of a control-OUT 
> transfer.  And I don't recall seeing anything outlawing PINGs during 
> the status stage of a control-IN transfer, although they would be 
> almost pointless.

Could have been yet another bug in that silicon.  I think such issues
have been pushing vendors to use EHCI more, even on non-PCI hosts, just
to get better overall quality for high speed host support!

- Dave

-
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Reply via email to