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From: Karsten Wiese <fzu@wemgehoertderstaat.de>
To: Ingo Molnar <mingo@elte.hu>
Subject: Re: 2.6.19-rc6-rt8
Date: Wed, 29 Nov 2006 01:04:51 +0100
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Cc: "Fernando Lopez-Lezcano" <nando@ccrma.stanford.edu>,
       linux-kernel@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>
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Am Dienstag, 28. November 2006 23:40 schrieb Karsten Wiese:
> Am Montag, 27. November 2006 10:49 schrieb Ingo Molnar:
> > i have released the 2.6.19-rc6-rt8 tree, which can be downloaded from 
> 
> I saw usb transport errors here before rebooting with
> 	nmi_watchdog=0
> contained in kernel command line.
> 
> Testcase stalled within 2 minutes before change,
> ticks happily after change for 15 minutes now.
> .config is a "release" type, no debugging options.

After estimated 15 minutes more it bugged again.
Related dmesg translates to linux error
	-EXDEV
propably caused by the following lines:

<snip>
static int uhci_result_isochronous(struct uhci_hcd *uhci, struct urb *urb)
{
	struct uhci_td *td, *tmp;
	struct urb_priv *urbp = urb->hcpriv;
	struct uhci_qh *qh = urbp->qh;

	list_for_each_entry_safe(td, tmp, &urbp->td_list, list) {
		unsigned int ctrlstat;
		int status;
		int actlength;

		if (uhci_frame_before_eq(uhci->cur_iso_frame, qh->iso_frame))
			return -EINPROGRESS;

		uhci_remove_tds_from_frame(uhci, qh->iso_frame);

		ctrlstat = td_status(td);
		if (ctrlstat & TD_CTRL_ACTIVE) {
			status = -EXDEV;	/* TD was added too late? */
</snip>

      Karsten
-
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