Re: S4 hang with uvcvideo causing "Unlink after no-IRQ? Controller is probably using the wrong IRQ."

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On Fri, 13 Mar 2009, Brandon Philips wrote:

> On 14:03 Fri 13 Mar 2009, Alan Stern wrote:
> > On Fri, 13 Mar 2009, Brandon Philips wrote:
> > 
> > > > Okay, not much information there but it's a start.  Here's a more 
> > > > informative patch to try instead.
> > > 
> > > Here is the log:
> > >  http://ifup.org/~philips/467317/pearl-alan-debug-2.log
> > 
> > I still can't tell what's happening.  Here's yet another patch.
> 
> http://ifup.org/~philips/467317/pearl-alan-debug-3.log

I think I see the problem; the patch below is an attempted fix.
Hopefully it will get your system working.

Alan Stern



Index: usb-2.6/drivers/usb/host/ehci-q.c
===================================================================
--- usb-2.6.orig/drivers/usb/host/ehci-q.c
+++ usb-2.6/drivers/usb/host/ehci-q.c
@@ -1127,7 +1127,7 @@ static void start_unlink_async (struct e
 	prev->qh_next = qh->qh_next;
 	wmb ();
 
-	if (unlikely (ehci_to_hcd(ehci)->state == HC_STATE_HALT)) {
+	if (unlikely(!HC_IS_RUNNING(ehci_to_hcd(ehci)->state))) {
 		/* if (unlikely (qh->reclaim != 0))
 		 *	this will recurse, probably not much
 		 */

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