From: Daniel Mack <zonque@gmail.com>
To: Sarbojit Ganguly <unixman.linuxboy@gmail.com>
Cc: Alan Stern <stern@rowland.harvard.edu>,
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: Sat, 28 Jul 2012 13:13:12 +0200 [thread overview]
Message-ID: <5013C948.3000802@gmail.com> (raw)
In-Reply-To: <CAP2rAF_K8Zg=+ahi23U34nb+Hewh+Xaa64jfQxBxOegN3=AnyA@mail.gmail.com>
On 23.07.2012 17:04, Sarbojit Ganguly wrote:
> 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).
>
Did you succeed in bisecting this problem down? From what I can tell,
there hasn't been any similar report on LKML yet. That makes traking the
problem on your machine even more important as you can reproduce it
reliably.
Thanks,
Daniel
prev parent reply other threads:[~2012-07-28 11:13 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
2012-07-23 15:07 ` Daniel Mack
2012-07-28 11:13 ` Daniel Mack [this message]
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