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Date: Tue, 2 Mar 2010 15:53:53 -0800
From: Greg KH <greg@kroah.com>
To: Peter Feuerer <peter@piie.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [BUG] usb-serial / pl2302 corrupted receive
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On Mon, Mar 01, 2010 at 07:07:00PM +0100, Peter Feuerer wrote:
> Hi Greg,
> 
> I tried to flash an AVR microcontroler via an USB to serial
> converter which uses pl2302 driver. It didn't work, so I set up
> following test to reproduce the bug:
> 
> I connected two pls2302 usb-serial converters to two different
> usb-ports of my machine and connected them with a rs232-nullmodem
> cable to each other.
> 
> Terminal1:
> cat /dev/ttyUSB1
> 
> Terminal2:
> while true; do echo 123456789012345678901234567890 > /dev/ttyUSB0 ; done

cat and echo are known to not work well with usb to serial devices.  Can
you duplicate this with a "real" tty program like minicom or something
else?

thanks,

greg k-h