[PATCH] USB: fix omninet driver bug

I introduced this way back in 2.6.13 when adding the port lock logic.
This device talks out through different "ports" all at the same time, so
the lock logic was wrong, preventing any data from ever being sent
properly.

Thanks a lot to Bernhard Reiter <bernhard@intevation.de> for being
patient and helping with debugging this.

Cc: Bernhard Reiter <bernhard@intevation.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/omninet.c

@@ -257,14 +257,14 @@ static int omninet_write (struct usb_serial_port *port, const unsigned char *buf
 		return (0);
 	}
 
-	spin_lock(&port->lock);
-	if (port->write_urb_busy) {
-		spin_unlock(&port->lock);
+	spin_lock(&wport->lock);
+	if (wport->write_urb_busy) {
+		spin_unlock(&wport->lock);
 		dbg("%s - already writing", __FUNCTION__);
 		return 0;
 	}
-	port->write_urb_busy = 1;
-	spin_unlock(&port->lock);
+	wport->write_urb_busy = 1;
+	spin_unlock(&wport->lock);
 
 	count = (count > OMNINET_BULKOUTSIZE) ? OMNINET_BULKOUTSIZE : count;
 
@@ -283,7 +283,7 @@ static int omninet_write (struct usb_serial_port *port, const unsigned char *buf
 	wport->write_urb->dev = serial->dev;
 	result = usb_submit_urb(wport->write_urb, GFP_ATOMIC);
 	if (result) {
-		port->write_urb_busy = 0;
+		wport->write_urb_busy = 0;
 		err("%s - failed submitting write urb, error %d", __FUNCTION__, result);
 	} else
 		result = count;