treewide: sysupgrade: use $UPGRADE_BACKUP to check for backup
Now that $UPGRADE_BACKUP is set conditionally there is no need to check the $UPGRADE_OPT_SAVE_CONFIG anymore. All conditions can be simplified. Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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@@ -75,7 +75,7 @@ dir825b_do_upgrade_combined() {
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if [ -n "$fw_mtd" ] && [ ${fw_blocks:-0} -gt 0 ]; then
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local append=""
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[ -f "$UPGRADE_BACKUP" -a "$UPGRADE_OPT_SAVE_CONFIG" -eq 1 ] && append="-j $UPGRADE_BACKUP"
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[ -f "$UPGRADE_BACKUP" ] && append="-j $UPGRADE_BACKUP"
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sync
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dd if="$fw_file" bs=64k skip=1 count=$fw_blocks 2>/dev/null | \
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