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Date:	Mon, 1 Sep 2014 13:19:02 +0200
From:	Ricardo Ribalda Delgado <>
To:	Mathias Nyman <>
Cc:	Greg Kroah-Hartman <>,
	Linux USB Mailing List <>,
	LKML <>
Subject: Re: [PATCH] xhci-ring: Fix Null pointer dereference

Do you have a NEC/Renesas uPD720200 USB 3.0 Host?

If so, try with an usb gadget acting as a mass storage. That hits the
bug in my machine.


On Mon, Sep 1, 2014 at 1:12 PM, Mathias Nyman <> wrote:
> On 09/01/2014 01:26 PM, Ricardo Ribalda Delgado wrote:
>> Well, it is hard to say. rc2 without the patch showed more warnings,
>> but never crashed badly (queuecommand_lck....).
>> The sample size is not big enough. maybe rc2 also has the
>> queuecommand_lck bug, but I havent hit it.
> Ok, I won't submit it as I now know what really is going on.
> I asked for once of the devices that can trigger this bug,
> I'll know more when I can get my hands on it
> -Mathias

Ricardo Ribalda
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