Update tulip net driver to indicate link beat to system,

via netif_carrier_{on,off}.  Some placeholders to do this were
already in the code, making this an even easier and more obvious patch.

Also, decrease time until next link beat check, if link beat
is not present.  (previously the code would wait 60 seconds until
next check, regardless of current link state)

Contributor: Stefan Rompf, with changes from me

drivers/net/tulip/21142.c

@@ -39,8 +39,13 @@ void t21142_timer(unsigned long data)
 		printk(KERN_INFO"%s: 21143 negotiation status %8.8x, %s.\n",
 			   dev->name, csr12, medianame[dev->if_port]);
 	if (tulip_media_cap[dev->if_port] & MediaIsMII) {
-		tulip_check_duplex(dev);
+		if (tulip_check_duplex(dev) < 0) {
+			netif_carrier_off(dev);
+			next_tick = 3*HZ;
+		} else {
+			netif_carrier_on(dev);
 			next_tick = 60*HZ;
+		}
 	} else if (tp->nwayset) {
 		/* Don't screw up a negotiated session! */
 		if (tulip_debug > 1)

drivers/net/tulip/ChangeLog

+2002-01-28  Stefan Rompf  <srompf@isg.de>,
+            Jeff Garzik  <jgarzik@mandrakesoft.com>
+
+        * 21142.c (t21142_timer):  Use return value of
+        tulip_check_duplex() to indicate to system whether or not
+        carrier is present.  Use carrier presence/absence to determine
+        when next the 21142 media timer should check for link beat.
+
+        * timer (tulip_timer):  Un-comment-out calls to
+        netif_carrier_{on,off}, as there is now value in
+        reporting link beta information to userspace.
+
 2002-01-28  Pavel Roskin  <proski@gnu.org>
 
 	* tulip_core.c (tulip_init_one): Use tp->eeprom instead of

drivers/net/tulip/timer.c

@@ -83,10 +83,10 @@ void tulip_timer(unsigned long data)
 					       medianame[mleaf->media & MEDIA_MASK]);
 				if ((p[2] & 0x61) == 0x01)	/* Bogus Znyx board. */
 					goto actually_mii;
-				/* netif_carrier_on(dev); */
+				netif_carrier_on(dev);
 				break;
 			}
-			/* netif_carrier_off(dev); */
+			netif_carrier_off(dev);
 			if (tp->medialock)
 				break;
 	  select_next_media:
@@ -110,11 +110,13 @@ void tulip_timer(unsigned long data)
 		}
 		case 1:  case 3:		/* 21140, 21142 MII */
 		actually_mii:
-			if (tulip_check_duplex(dev) < 0)
-				{ /* netif_carrier_off(dev); */ }
-			else
-				{ /* netif_carrier_on(dev); */ }
+			if (tulip_check_duplex(dev) < 0) {
+				netif_carrier_off(dev);
+				next_tick = 3*HZ;
+			} else {
+				netif_carrier_on(dev);
 				next_tick = 60*HZ;
+			}
 			break;
 		case 2:					/* 21142 serial block has no link beat. */
 		default: