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Date: Tue, 19 Oct 2010 05:47:13 -0700
From: Greg KH <greg@kroah.com>
To: Raju Rameshwar Uprade <rajsingh@ncra.tifr.res.in>
Cc: linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org
Subject: Re: pl2303 ttyUSB0: pl2303_write - failed submitting write urb,
 error -22
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On Tue, Oct 19, 2010 at 10:46:51AM +0530, Raju Rameshwar Uprade wrote:
> 
> > What kernel version are you using?
> > 
> 
> I am using kernel version 2.6.25.I cann't use current linux kernel version because it
> uses the generic write function and for my application I need pl2303_write. 

Then you are really on your own here, sorry.

good luck,

greg k-h