From 79cba9ff7eb688cd6a61c7b906865fc209ddf3bc Mon Sep 17 00:00:00 2001
From: Brett Gordon <beretta42@gmail.com>
Date: Tue, 15 Nov 2016 20:53:54 -0500
Subject: [PATCH] coco3: drivewire: dynamic polling back-off.

---
 Kernel/platform-coco3/ttydw.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Kernel/platform-coco3/ttydw.c b/Kernel/platform-coco3/ttydw.c
index 0383681b..c9c5b2a8 100644
--- a/Kernel/platform-coco3/ttydw.c
+++ b/Kernel/platform-coco3/ttydw.c
@@ -244,14 +244,14 @@ void dw_vpoll( ){
 			min=mini( buf[1], qfree( minor ) );
 			b[2]=min;
 			if( !min ){
-				wait=1;
+				wait = MAX_WAIT;
 				break;
 			}
 			dw_transaction( b,3,tbuf, min, 0 );
 			for( i=0; i<min; i++){
 				tty_inproc( minor, tbuf[i] );
 			}
-			wait=1;
+			wait = 16 - (min >> 4);
 			break;
 		}
 		/* VWIN channel single datum */
-- 
2.34.1