===== drivers/net/wan/sdlamain.c 1.23 vs edited =====
--- 1.23/drivers/net/wan/sdlamain.c	2003-10-06 02:23:10 +10:00
+++ edited/drivers/net/wan/sdlamain.c	2004-08-14 15:16:40 +10:00
@@ -68,6 +68,7 @@
 #include <linux/inetdevice.h>
 
 #include <linux/ip.h>
+#include <linux/rcupdate.h>
 #include <net/route.h>
  
 #define KMEM_SAFETYZONE 8
@@ -1268,37 +1269,39 @@
 	
 	struct in_ifaddr *ifaddr;
 	struct in_device *in_dev;
+	unsigned long addr = 0;
 
+	rcu_read_lock();
 	if ((in_dev = __in_dev_get(dev)) == NULL){
-		return 0;
+		goto out;
 	}
 
 	if ((ifaddr = in_dev->ifa_list)== NULL ){
-		return 0;
+		goto out;
 	}
 	
 	switch (option){
 
 	case WAN_LOCAL_IP:
-		return ifaddr->ifa_local;
+		addr = ifaddr->ifa_local;
 		break;
 	
 	case WAN_POINTOPOINT_IP:
-		return ifaddr->ifa_address;
+		addr = ifaddr->ifa_address;
 		break;	
 
 	case WAN_NETMASK_IP:
-		return ifaddr->ifa_mask;
+		addr = ifaddr->ifa_mask;
 		break;
 
 	case WAN_BROADCAST_IP:
-		return ifaddr->ifa_broadcast;
+		addr = ifaddr->ifa_broadcast;
 		break;
-	default:
-		return 0;
 	}
 
-	return 0;
+out:
+	rcu_read_unlock();
+	return addr;
 }	
 
 void add_gateway(sdla_t *card, struct net_device *dev)