linux-kernel - Re: Regression due to: net/usbnet: avoid recursive locking in usbnet

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Message-Id: <201203230821.51870.oliver@neukum.org>
Date:	Fri, 23 Mar 2012 08:21:51 +0100
From:	Oliver Neukum <oliver@...kum.org>
To:	Stephen Warren <swarren@...dotorg.org>
Cc:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-usb@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
	Willy Tarreau <willy@...a-x.org>,
	Alan Stern <stern@...land.harvard.edu>
Subject: Re: Regression due to: net/usbnet: avoid recursive locking in usbnet_stop()

Am Donnerstag, 22. März 2012, 23:56:52 schrieb Stephen Warren:
> It looks like commit 4231d47e6fe69f061f96c98c30eaf9fb4c14b96d
> "net/usbnet: avoid recursive locking in usbnet_stop()" causes a problem
> for me.
> 
> When I reboot or shutdown, I see the error spew below at least 50% of
> the time. Reverting the above patch fixes this, at least for 10 reboot
> attempts.

The patch "usbnet: increase URB reference count before usb_unlink_urb" has just been
applied. Could you test whether it fixes your proble?

	Regards
		Oliver
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