[AX25]: Fix cb lookup

Ax AX.25 connection is identified only by it's source and destination,
not by the device it's routed through, so fix the connection block
lookup to ignore the device of a connection.  This fixes dying connections
in case of an AX.25 routing flap.
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ax25/af_ax25.c

@@ -207,16 +207,8 @@ ax25_cb *ax25_find_cb(ax25_address *src_addr, ax25_address *dest_addr,
 			continue;
 		if (s->ax25_dev == NULL)
 			continue;
-		if (ax25cmp(&s->source_addr, src_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->ax25_dev->dev == dev) {
-			if (digi != NULL && digi->ndigi != 0) {
-				if (s->digipeat == NULL)
-					continue;
-				if (ax25digicmp(s->digipeat, digi) != 0)
-					continue;
-			} else {
-				if (s->digipeat != NULL && s->digipeat->ndigi != 0)
-					continue;
-			}
+		if (ax25cmp(&s->source_addr, src_addr) == 0 &&
+		    ax25cmp(&s->dest_addr, dest_addr) == 0) {
 			ax25_cb_hold(s);
 			spin_unlock_bh(&ax25_list_lock);