linux-kernel - Re: [REGRESSION] "USB: use kfifo to buffer usb-generic serial writes" causes gobi

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Message-Id: <201002212337.53470.anssi.hannula@iki.fi>
Date:	Sun, 21 Feb 2010 23:37:53 +0200
From:	Anssi Hannula <anssi.hannula@....fi>
To:	Oliver Neukum <oliver@...kum.org>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	Matthew Garrett <mjg59@...f.ucam.org>, dvomlehn@...co.com,
	gregkh@...e.de, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [REGRESSION] "USB: use kfifo to buffer usb-generic serial writes" causes gobi_loader to hang

On lauantai 20 helmikuu 2010 20:19:10 Oliver Neukum wrote:
> Am Samstag, 20. Februar 2010 17:03:41 schrieb Anssi Hannula:
> > > But something must kill your last URB.
> > > You are not using autosuspend are you?
> > 
> > Don't know, usbcore has autosuspend=2 and the gobi device has
> > autosuspend=2 and supports_autosuspend=1.
> 
> What is the content of "level"?

"on"

> > > Can load usbserial with "debug=1"?
> > 
> > Here's the end of dmesg when running with that option:
> > http://stuff.onse.fi/gobi2000/gobi-regression.dmesg.log
> > 
> > This is again with the gobi_loader with extra sleep added in the
> > beginning. Otherwise it hangs (which is the actual original problem).
> 
> That log makes sure that the final cancellation comes from closing
> the file. Is that a log of a working run?

No.

-- 
Anssi Hannula
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