Alan,
That did the trick! Now what would be really good is if there was a
module argument that could disable FSBR for pesky devices. Or maybe a
way that if the FSBR seems to be failing, to fall back to disabling
it?
Thanks again!
-Jeff
On 1/5/06, Alan Stern <[EMAIL PROTECTED]> wrote:
> On Wed, 4 Jan 2006, Jeff Lange wrote:
>
> > Alan,
> > Yes it did attempt it 4 times, This error occurs on multiple PC's
> > and using different devices (a customer first reported it to us), so I
> > would say that it's not a problem with the cable. I'm just confused
> > why it will work in windows and on a 2.4 kernel. Have the timeout
> > values greatly changed from 2.4 to 2.6? If so, maybe I'll try
> > tweaking with that and see if I can get it to work.
>
> I doubt that it's a timeout issue. There's a good chance it's related to
> Full Speed Bandwidth Reclamation -- your device may not be able to handle
> it. IIRC one of the UHCI drivers in 2.4 didn't use FSBR, and there
> probably are situations where Windows doesn't use it either (like when a
> device isn't in the CONFIGURED state, although I'm not certain about
> that).
>
> You can try the patch below (for 2.6.15) to turn off FSBR permanently. If
> it gets your device to work, then good. Be warned, however, that it will
> greatly reduce throughput -- up to a factor of 20 -- for some kinds of
> devices.
>
> Alan Stern
>
>
>
> Index: l2615/drivers/usb/host/uhci-q.c
> ===================================================================
> --- l2615.orig/drivers/usb/host/uhci-q.c
> +++ l2615/drivers/usb/host/uhci-q.c
> @@ -521,8 +521,10 @@ static void uhci_inc_fsbr(struct uhci_hc
>
> if ((!(urb->transfer_flags & URB_NO_FSBR)) && !urbp->fsbr) {
> urbp->fsbr = 1;
> +#if 0
> if (!uhci->fsbr++ && !uhci->fsbrtimeout)
> uhci->skel_term_qh->link =
> cpu_to_le32(uhci->skel_fs_control_qh->dma_handle) | UHCI_PTR_QH;
> +#endif
> }
> }
>
>
>
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