[ "$has_kernel" = "1" ] && {
local kern_ubivol="$(nand_find_volume $ubidev kernel)"
tar xf $tar_file sysupgrade-$board_name/kernel -O | \
[ "$has_kernel" = "1" ] && {
local kern_ubivol="$(nand_find_volume $ubidev kernel)"
tar xf $tar_file sysupgrade-$board_name/kernel -O | \