linux-kernel - Re: Kernel Oops while disconnecting USB peripheral (always)

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Message-ID: <CAP2rAF8Kk7CfDeg2dAqK_oZdUzuWDm1+Rd=uoKS5GVw0ssDpfw@mail.gmail.com>
Date:	Mon, 23 Jul 2012 20:35:53 +0530
From:	Sarbojit Ganguly <unixman.linuxboy@...il.com>
To:	Daniel Mack <zonque@...il.com>
Cc:	Alan Stern <stern@...land.harvard.edu>, gregkh@...uxfoundation.org,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	Takashi Iwai <tiwai@...e.de>
Subject: Re: Kernel Oops while disconnecting USB peripheral (always)

On 23 July 2012 20:24, Daniel Mack <zonque@...il.com> wrote:
> On 23.07.2012 16:47, Alan Stern wrote:
>> On Mon, 23 Jul 2012, Sarbojit Ganguly wrote:
>>> That is why I provided two stacks,
>>>
>>> 1st one is when I tried to remove the USB hub (which connects a webcam
>>> + microphone)
>>> 2nd one is when I tried to remove an USB powered external HDD.
>>>
>>> Just to make sure whether the problem is with USB sound or the USB subsystem.
>>
>> Do you stop all the programs that are using the USB devices before
>> unplugging the hub?  Do you unmount the USB HDD first?
>>
>> The first crash shows a problem in the snd-usb-audio driver.
>>
>> The second crash shows a problem in the VFS layer or in ext3, not in
>> the USB stack.
>
> I dare to doubt there are two severe bugs of that kind that are 100%
> reproducible. I haven't had a  hotplug crash in any of the two drivers
> for a long time, and I use both of them extensively.
>
> I rather assume there's something else failing, probably some host
> controller issue that corrupts mempory? Can anyone else reproduce this
> maybe?
>
>
>
> Daniel
>

I will be happy to provide my .config if that is required. I think
that might help in narrowing down the bug

-- 
Regards,
Sarbojit
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