linux-kernel - Re: [PATCH 11/11] usb: core: fix a race with usb_queue_reset

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Message-ID: <Pine.LNX.4.44L0.1501211351560.1670-100000@iolanthe.rowland.org>
Date:	Wed, 21 Jan 2015 13:52:42 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Olivier Sobrie <olivier@...rie.be>
cc:	Jan Dumon <j.dumon@...ion.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	<linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>,
	<netdev@...r.kernel.org>
Subject: Re: [PATCH 11/11] usb: core: fix a race with usb_queue_reset_device()

On Wed, 21 Jan 2015, Olivier Sobrie wrote:

> I tested your patch. It also fixes the problem I observed.
> You can drop mine.
> 
> For your info:
> 
> My test consists in powering down a usb hso modem while one of its
> serial port is opened. It leads to two URB failures, each urb callback
> queues a reset.
> Without your fix (or without the one I sent), a crash happens after
> less than ~20 power up/down sequences. With your fix, after more than
> 1000 power up/down I don't see any crash.

Okay, I'll submit the patch.  Thanks for testing it.

Alan Stern

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