diff --git a/drivers/net/sk98lin/uboot_drv.c b/drivers/net/sk98lin/uboot_drv.c
index 8b04842..205e7d2 100644
--- a/drivers/net/sk98lin/uboot_drv.c
+++ b/drivers/net/sk98lin/uboot_drv.c
@@ -70,7 +70,7 @@
 		eth_register(dev[i]);
 	}
 
-	return numdev;
+	return ((numdev > 0) && (numdev <= SKGE_MAX_CARDS) ? 0 : -1);
 }