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From: Sarbojit Ganguly <unixman.linuxboy@gmail.com>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Daniel Mack <zonque@gmail.com>,
	gregkh@linuxfoundation.org, linux-usb@vger.kernel.org,
	linux-kernel@vger.kernel.org, Takashi Iwai <tiwai@suse.de>
Subject: Re: Kernel Oops while disconnecting USB peripheral (always)
Date: Mon, 23 Jul 2012 20:34:46 +0530	[thread overview]
Message-ID: <CAP2rAF_K8Zg=+ahi23U34nb+Hewh+Xaa64jfQxBxOegN3=AnyA@mail.gmail.com> (raw)
In-Reply-To: <Pine.LNX.4.44L0.1207231044380.1633-100000@iolanthe.rowland.org>

On 23 July 2012 20:17, Alan Stern <stern@rowland.harvard.edu> wrote:
> On Mon, 23 Jul 2012, Sarbojit Ganguly wrote:
>
>> Hello Daniel,
>>
>> 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?

Yes Alan, I did unmount the HDD

>
> 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.

Yes the issue is in evict() api which gets called when USB disconnect
is triggered.
>
> Alan Stern
>

Even I was confused in the beginning but after thorough check I
confirmed its presence. I reverted back to my distro's stock kernel
(3.2.0-26-generic) where the issue does not recur.

I could not analysed further (due to my limited knowledge of USB).



-- 
Regards,
Sarbojit

  parent reply	other threads:[~2012-07-23 15:04 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-23  3:42 Kernel Oops while disconnecting USB peripheral (always) Sarbojit Ganguly
2012-07-23  5:50 ` Daniel Mack
2012-07-23  6:03   ` Sarbojit Ganguly
2012-07-23 14:47     ` Alan Stern
2012-07-23 14:54       ` Daniel Mack
2012-07-23 15:05         ` Sarbojit Ganguly
2012-07-28 12:27         ` Bjørn Mork
2012-07-28 12:52           ` Daniel Mack
2012-07-28 13:25             ` Bjørn Mork
2012-07-28 13:30               ` Daniel Mack
2012-07-28 16:19             ` Alan Stern
2012-08-08  3:22               ` Sarbojit Ganguly
2012-07-23 15:04       ` Sarbojit Ganguly [this message]
2012-07-23 15:07         ` Daniel Mack
2012-07-28 11:13         ` Daniel Mack

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