1 files changed, 14 insertions, 9 deletions

diff --git a/drivers/net/wan/sdlamain.c b/drivers/net/wan/sdlamain.c
index 74e151acef3e..7a8b22a7ea31 100644
--- a/drivers/net/wan/sdlamain.c
+++ b/drivers/net/wan/sdlamain.c
@@ -57,6 +57,7 @@
 #include <linux/ioport.h>       /* request_region(), release_region() */
 #include <linux/wanrouter.h>    /* WAN router definitions */
 #include <linux/wanpipe.h>      /* WANPIPE common user API definitions */
+#include <linux/rcupdate.h>
 
 #include <linux/in.h>
 #include <asm/io.h>             /* phys_to_virt() */
@@ -1268,37 +1269,41 @@ unsigned long get_ip_address(struct net_device *dev, int option)
         
         struct in_ifaddr *ifaddr;
         struct in_device *in_dev;
+        unsigned long addr = 0;
 
-        if ((in_dev = __in_dev_get(dev)) == NULL){
-                return 0;
+        rcu_read_lock();
+        if ((in_dev = __in_dev_get_rcu(dev)) == NULL){
+                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;
+                break;
         }
 
-        return 0;
+out:
+        rcu_read_unlock();
+        return addr;
 }       
 
 void add_gateway(sdla_t *card, struct net_device *dev)