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Date: Mon, 12 Jun 2006 16:41:14 -0400
From: Mark Lord <lkml@rtr.ca>
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To: Greg KH <gregkh@suse.de>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: pl2303 ttyUSB0: pl2303_open - failed submitting interrupt urb,
 error -28
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Mark Lord wrote:
> Greg,
> 
> With 2.6.17-rc6-git2, I'm seeing this kernel message during start-up:
> 
>  pl2303 ttyUSB0: pl2303_open - failed submitting interrupt urb, error -28
> 
> The pl2303 serial port is part of a USB1.1 Hub/dock device,
> plugged into a USB2 port on my notebook.
> 
> I get the same failure again when trying to use the port with Kermit.
> This device was working fine here not long ago -- on the -rc5 kernels I 
> think.

Mmm.. no, it's broken in 2.6.17-rc5 as well.
I'll go back to 2.6.16.xx now, and see about that.

> 
> Unplugging the hub/dock does this:
> 
> kernel BUG at kernel/workqueue.c:110!
> invalid opcode: 0000 [#1]
> PREEMPT
...