treewide: sysupgrade: use $UPGRADE_BACKUP to check for backup

[openwrt/openwrt.git] / package / base-files / files / lib / upgrade / common.sh

diff --git a/package/base-files/files/lib/upgrade/common.sh b/package/base-files/files/lib/upgrade/common.sh
index 8e7866f69847953c48dce009e473a82366e75f99..0d3162d4fcf6f9ac04705b5b076443440609e9dc 100644 (file)
--- a/package/base-files/files/lib/upgrade/common.sh
+++ b/package/base-files/files/lib/upgrade/common.sh
@@ -220,7 +220,7 @@ indicate_upgrade() {
 # $(2): (optional) pipe command to extract firmware, e.g. dd bs=n skip=m
 default_do_upgrade() {
        sync
-       if [ "$UPGRADE_OPT_SAVE_CONFIG" -eq 1 ]; then
+       if [ -n "$UPGRADE_BACKUP" ]; then
                get_image "$1" "$2" | mtd $MTD_ARGS $MTD_CONFIG_ARGS -j "$UPGRADE_BACKUP" write - "${PART_NAME:-image}"
        else
                get_image "$1" "$2" | mtd $MTD_ARGS write - "${PART_NAME:-image}"