---------- Forwarded message ----------
From: Chetan Karia <[EMAIL PROTECTED]>
Date: 20 Feb 2008 10:35
Subject: Question regarding usb-serial based driver.
To: linux-usb@vger.kernel.org
Hello,
I am kernel newbie and I have a question about usb serial driver. I
have a usb to serial driver which exposes 3 virtual serial ports
ttyUSB0, ttyUSB1 and ttyUSB2. The endpoint to virtual serial port
mapping is like this
ep0 ==> ttyUSB0
ep1 ==> ttyUSB1
ep2 ==> ttyUSB2.
All I want to do is create another virtual serial port ttyUSB3 (easy)
and setup its endpoint address (bulk in and bulk out) to same as
ttyUSB1 that is ep1. I do this in attach function of the driver and I
want to know will there be any race condition if ttyUSB1 and ttyUSB3
are used simultaneously? Is there any way to overcome that race
condition or its simply not correct way to go.
My sole intention for doing that is ttyUSB1 and ttyUSB3 should be able
to read/write from/to same endpoint (ep1) concurrently. Is that
possible?
I am using kernel version 2.6.22. There are no interrupt endpoints,
only 3 bulk in and 3 bulk out endpoints.
Thank you for your time and looking forward to your reply,
Chetan Karia
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