PERFORCE change 149715 for review

[Hans Petter Selasky]

http://perforce.freebsd.org/chv.cgi?CH=149715

Change 149715 by hselasky at hselasky_laptop001 on 2008/09/13 16:08:28

	
	Re-introduce bypass functionality in USB TTY interface.
	Thanks to ED.

Affected files ...

.. //depot/projects/usb/src/sys/dev/usb2/serial/usb2_serial.c#10 edit

Differences ...

==== //depot/projects/usb/src/sys/dev/usb2/serial/usb2_serial.c#10 (text+ko) ====

@@ -1064,6 +1064,16 @@
 
 		buf = res.buffer;
 
+		/* first check if we can pass the buffer directly */
+
+		if (ttydisc_can_bypass(tp)) {
+			if (ttydisc_rint_bypass(tp, buf, cnt) != cnt) {
+				DPRINTF("tp=%p, data lost\n", tp);
+			}
+			continue;
+		}
+		/* need to loop */
+
 		for (cnt = 0; cnt != res.length; cnt++) {
 			if (ttydisc_rint(tp, buf[cnt], 0) == -1) {
 				/* XXX what should we do? */