mediatek: filogic: avoid sub-shell invovation in netdev rename loop

Rename network devices to their label set in DT without invocation of
a sub-shell.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(cherry picked from commit 983222605ce6fabb036fbbd5797b6689ed082136)

diff --git a/target/linux/mediatek/filogic/base-files/lib/preinit/04_set_netdev_label b/target/linux/mediatek/filogic/base-files/lib/preinit/04_set_netdev_label
index f8b6f155deb64c21feb4ba21fa75bc89b4348977..110e023b962d3dfb86883d7bd840458ecece67ce 100644 (file)
--- a/target/linux/mediatek/filogic/base-files/lib/preinit/04_set_netdev_label
+++ b/target/linux/mediatek/filogic/base-files/lib/preinit/04_set_netdev_label
@@ -5,8 +5,8 @@ set_netdev_labels() {
 
        for dir in /sys/class/net/*; do
                [ -r "$dir/of_node/label" ] || continue
-               label="$(cat "$dir/of_node/label")"
-               netdev="$(basename $dir)"
+               read -r label < "$dir/of_node/label"
+               netdev="${dir##*/}"
                [ "$netdev" = "$label" ] && continue
                ip link set "$netdev" name "$label"
        done