Re: "clear_halt for a busy endpoint" from USB printers.

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On Mon, 6 Feb 2012, Dave Jones wrote:

> We've had a few reports of the "clear_halt for a busy endpoint" WARN
> from ehci_endpoint_reset().
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=749907
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=781762
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=787533
> 
> The common theme seems to be that they all have usblp loaded.
> 
> What can we do to help diagnose these ?

Have the bug reporters collect a usbmon trace, following the
instructions in Documentation/usb/usbmon.txt.

Alan Stern

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