PERFORCE change 123817 for review

[Peter Wemm]

http://perforce.freebsd.org/chv.cgi?CH=123817

Change 123817 by peter at peter_overcee on 2007/07/20 18:58:11

	Lower the SIO fifo trigger threshold one click.  This seems to
	stop the regular sio overflows on my amd64 box.

Affected files ...

.. //depot/projects/hammer/sys/dev/sio/sio.c#55 edit

Differences ...

==== //depot/projects/hammer/sys/dev/sio/sio.c#55 (text+ko) ====

@@ -1820,7 +1820,7 @@
 		 */
 		com->fifo_image = com->unit == siotsunit ? 0
 				  : t->c_ispeed <= 4800
-				  ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_MEDH;
+				  ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_MEDL;
 #ifdef COM_ESP
 		/*
 		 * The Hayes ESP card needs the fifo DMA mode bit set