Just the serial port in the first interface should control DTR and RTS 
lines. This way, the closing of the rest of the ports does not produce a 
hangup in the communication. 

Signed-off-by: Miguel Angel Alvarez  <[EMAIL PROTECTED]>
Signed-Off-By: Matthias Urlichs <[EMAIL PROTECTED]>
---

diff -ur linux-2.6.18.4_no_patched/drivers/usb/serial/option.c 
linux-2.6.18.4_patched/drivers/usb/serial/option.c
--- linux-2.6.18.4_no_patched/drivers/usb/serial/option.c       
2006-12-13 10:45:16.000000000 +0100
+++ linux-2.6.18.4_patched/drivers/usb/serial/option.c  2006-12-14 
17:03:02.000000000 +0100
@@ -622,6 +622,9 @@

       dbg("%s", __FUNCTION__);

+       if(port->number != 0)
+               return 0;
+
       portdata = usb_get_serial_port_data(port);

       if (port->tty) {

-- 
Matthias Urlichs   |   {M:U} IT Design @ m-u-it.de   |  [EMAIL PROTECTED]
Disclaimer: The quote was selected randomly. Really. | http://smurf.noris.de
 - -
You'd best be snoozin', 'cause you don't be gettin' no work done at 5 a.m.
anyway.
                -- From the wall of the Wurster Hall stairwell

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