realtek: Avoid empty lan mac in initial network setup

If the lan_mac cannot be found, it is still used (as empty string) in
various operations. This is not valid and other 02_network scripts checking
for a non-empty string before using it. This should also be adopted for the
realtek 02_network.

Signed-off-by: Sven Eckelmann <se@simonwunderlich.de>
Link: https://github.com/openwrt/openwrt/pull/20241
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

diff --git a/target/linux/realtek/base-files/etc/board.d/02_network b/target/linux/realtek/base-files/etc/board.d/02_network
index 79c140c32a9b6e8090cdb6bd4ea4a6a873a910d1..464ff976cfa29b87ec065cb46b9ee4f33c54afaf 100644 (file)
--- a/target/linux/realtek/base-files/etc/board.d/02_network
+++ b/target/linux/realtek/base-files/etc/board.d/02_network
@@ -97,11 +97,11 @@ realtek_setup_macs()
                ;;
        esac
 
-       ucidef_set_interface_macaddr "lan" $lan_mac
-       ucidef_set_bridge_mac "$lan_mac"
-       ucidef_set_network_device_mac eth0 $lan_mac
+       [ -n "$lan_mac" ] && ucidef_set_interface_macaddr "lan" $lan_mac
+       [ -n "$lan_mac" ] && ucidef_set_bridge_mac "$lan_mac"
+       [ -n "$lan_mac" ] && ucidef_set_network_device_mac eth0 $lan_mac
 
-       [ -z "$lan_mac_start" ] && lan_mac_start=$lan_mac
+       [ -z "$lan_mac_start" -a -n "$lan_mac" ] && lan_mac_start=$lan_mac
        realtek_setup_macs_lan "$lan_list" "$lan_mac_start" "$lan_mac_end"
 
        [ -n "$label_mac" ] && ucidef_set_label_macaddr $label_mac