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Date: Wed, 3 Mar 2010 12:14:41 +0000
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Greg KH <greg@kroah.com>
Cc: Peter Feuerer <peter@piie.net>, linux-kernel@vger.kernel.org
Subject: Re: [BUG] usb-serial / pl2302 corrupted receive
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> > 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?

That should no longer be the case. The kfifo buffering implementation
fixed all the broken internal buffering in the usb tty code - or should
have done.

Definitely worthy of more investigation if the second open/closes are
disrupting stuff.