linux-kernel - Re: core: workque: workqueue recursion when unplugging usb WCDMA modem on 2.6.32 kernel

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Date:	Wed, 21 Apr 2010 11:27:47 -0700
From:	Greg KH <greg@...ah.com>
To:	YuPing Luo <YuPing.Luo@....com>
Cc:	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: core: workque: workqueue recursion when unplugging usb WCDMA
 modem on 2.6.32 kernel

On Tue, Apr 20, 2010 at 11:27:55PM -0700, YuPing Luo wrote:
> Hi,
>    I have one ARM11-based board, while upgrading the kernel from 27 to
> 32, got the workqueue recursion warning almost, and the console get
> lost. While the issue can be resolved by applying the patch "[PATCH v2]
> core: workqueue: return on workqueue recursion", and I am still
> struggling to find the root cause. 

Is your console on a usb to serial device?  Or a serial port?

if usb to serial, can you try .33-rc5 and let us know if that solves the
problem?

thanks,

greg k-h
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