Re: [BUG] usb-serial / pl2302 corrupted receive

[Johan Hovold <jhovold@gmail.com>]

On Wed, Mar 03, 2010 at 11:47:05AM +0100, peter@piie.net wrote:
> Quoting Greg KH <greg@kroah.com>:
> > On Mon, Mar 01, 2010 at 07:07:00PM +0100, Peter Feuerer wrote:
> >> 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?
> 
> I will try to set up a test use-case which uses kermit.
> 
> But there is a calltrace in kernel log when using cat & echo, so  
> something in the driver went wrong.
> Thus there is a bug which can be reproduced and it should be fixed,  
> don't you agree?

Not necessarily. The warning you attached to your first post is a false
one (it has been fixed in 2.6.33) and is not directly related to the
problem you describe.

/Johan